In our results from 2015-09-19 to 2026-09-28.
Wording removed by a change is shown struck through, as in the original. 47 changes, 55 other letters.
#37187 from Marvin Hodges · Rule change · TB 24-12 (2024-12 Fastrack)
In P2 Engine Table, Line E Note 2, add the following:
"8. Minimum weight 1335 lbs."
#35835 from Bart Wolf · Rule change · TB 24-05 (2024-05 Fastrack)
In P2 Engine Table, Spec Line E, change the notes as follows:
"No engine modifications except for dry sump oil system, ECU mapping, and exhaust system the following: oil system, ECU, and
exhaust are unrestricted."
#35900 from Club Racing Board · Rule change · TB 24-05 (2024-05 Fastrack)
In P2 Table 1, FIA Group CN spec line, change the notes as follows:
"FIA Group CN homologated chassis, brake calipers and discs, hub carriers, and suspension components are required. V de
V European Proto Endurance Series Challenge permitted bodywork, rear diffuser, wing, wheels, and assisted
shifting are allowed. Car M must comply with all other P2 requirements. Competitors must have copies of FIA Group CN
Technical Regulations and V de V European Proto Endurance Series Challenge Sporting and Technical Regulations in theirpossession and present them upon request are available here: https://www.scca.com/pages/technical-forms-and-downloads."
#35225 from Club Racing Board · Rule change · TB 24-01 (2024-01 Fastrack)
In P2 Table 1, change as follows:
P2 Table 1 (Spec Line Cars)
A specification table follows in the original; it is not shown here.
#35340 from Michael A Reupert · Rule change · TB 24-01 (2024-01 Fastrack)
In P2 Engine Table, Spec Line B.1, add to notes as follows:
"No modifications allowed on engines manufactured after 2008 model year. 2007-2008 Suzuki GSX-R1000 crankcase part
#11300-21860 may be replaced with 2016-2019 Suzuki GSX-S1000 crankcase part #11301-04840."
#35182 from Formula/Sports Racing Committee · Rule change · TB 23-12 (2023-09 Fastrack)
In P2 Table 1, change as follows:
P2 Table 1 (Spec Line Cars)
A specification table follows in the original; it is not shown here.
#34143 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)
In P2, GCR section 9.1.8.C.D.6, change as follows:
"As viewed from the side, T the outermost surface of side pods body between the front and rear wheel openings and above the
floor must have a minimum height equal to the height of the front axle centerline."
#34144 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)
In P2, GCR section 9.1.8.C.C, add a section as follows:
"4. Closed cockpit single seat cars are not permitted unless specifically allowed by a spec line in Table 1."
#34012 from Club Racing Board · Rule change · TB 23-04 (2023-04 Fastrack)
In P2 Engine Table, Spec Line B.1, change as follows:
#34038 from Club Racing Board · Rule change · TB 23-04 (2023-04 Fastrack)
In P2, GCR section 9.1.8.C.D.2, change as follows:
"Height: No part of the vehicle having special or significant aerodynamic function shall exceed a height of 115cm (45.275 inches)
above the ground with the car in normal racing trim, driver aboard."
In P2, GCR section 9.1.8.C.D.3, change as follows:
"However, no portion shall extend more than 10cm (3.937 inches) beyond a plane tangent to the outer face of the front and rear
wheels with tires."
P2 Engine Table
Spec
Line Engine Series
A specification table follows in the original; it is not shown here.
#33378 from Benjamin Cooper · Rule change · TB 23-01 (2023-01 Fastrack)
In P2 Table 1, change as follows:
P2 Table 1 (Spec Line Cars)
Marque
Wheelbase inches
max/ Track Max
inches
Weight Displacement Engine Restrictor Notes
A specification table follows in the original; it is not shown here.
#33485 from Jeff Barrow · Rule change · TB 23-01 (2023-01 Fastrack)
In P2 Table 1, Radical SR3/SR4 spec line, make the following change:
P2 Table 1 (Spec Line Cars)
A specification table follows in the original; it is not shown here.
#33519 from Club Racing Board · Rule change · TB 23-01 (2023-01 Fastrack)
In P2, GCR section 9.1.8.A.1, change as follows:
"Chassis fully composed of composite structural materials or chassis partially composed of composite materials that is notcapable of rolling on its wheels without the composite materials being installed."
In P2, GCR section 9.1.8.C.C.1, change as follows:
"Allow for any form of chassis construction except fully composite chassis incorporating composite structural materials. A chassispartially composed of composite materials must satisfy the requirements of section 9.4.5.A, B, C, E, F, and be capable of rollingon its wheels without the composite materials being installed. Both tube frame and aluminum or steel monocoque chassis
construction are allowed.”
In P2, GCR section 9.1.8.C.2, change as follows:
"Anti-intrusion panels are allowed anywhere on the sides of the chassis. Materials and attachmentare is unrestricted. Attachment points must be at least 15cm (5.906 inches) apart center to center using fasteners no larger than
6.5mm (0.256 inches) diameter.”
In P2 Table 1, add the following:
P2 Table 1 (Spec Line Cars)
A specification table follows in the original; it is not shown here.
#33608 from Club Racing Board · Rule change · TB 23-01 (2023-01 Fastrack)
In P2 Engine Table, Spec Line B.1, change as follows:
#32469 from Club Racing Board · Rule change · TB 22-05 (2022-04 Fastrack)
In P2, GCR section 9.1.8.C.A.1, add the following:
"Chassis fully composed of composite structural materials or chassis partially composed of composite materials that is not
capable of rolling on its wheels without the composite materials being installed."
In P2, GCR section 9.1.8.C.C.1, add the following:
"Allow for any form of chassis construction except fully composite chassis. A chassis partially composed of composite materials
must satisfy the requirements of section 9.4.5.A, B, C, E, F and be capable of rolling on its wheels without the composite materials
being installed."
#32525 from Formula/Sports Racing Committee · Rule change · TB 22-05 (2022-04 Fastrack)
In P2, GCR section 9.1.8.C, change as follows:
"PROTOTYPE 2 (P2) CLASSIFICATION"
In GCR CONTENTS, change as follows:
"PROTOTYPE 2 (P2) CLASSIFICATION"
#32373 from Club Racing Board · Rule change · TB 22-04 (2022-04 Fastrack)
In F500, GCR Section 9.1.1.D.15.D., change as follows:
"Stand-alone after market aftermarket ECUs are not permitted."
In P2, GCR Section 9.1.8.F.3.a., change as follows:
"As manufactured and ground by Oldsmobile or by an after after market aftermarket cam manufacturer to Oldsmobile factory
specifications for Vin.A (W41) or Mantapart #OP 1149."
In P2, GCR Section 9.1.8.F.3.b., change as follows:
"As manufactured and ground by Oldsmobile or by an after market aftermarket cam manufacturer to Oldsmobile factory profile
Vin. D or Mantapart #OP 1148."
#32147 from Formula/Sports Racing Committee · Rule change · TB 22-03 (2022-03 Fastrack)
In P2 Table 1, add a spec line as follows:
P2 Table 1 (Spec Line Cars)
A specification table follows in the original; it is not shown here.
#32148 from Formula/Sports Racing Committee · Rule change · TB 22-03 (2022-03 Fastrack)
In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 spec line, change the notes as follows:
"Wings up to 16.5in cord chord of single or dual element;"
In P2 Table 1, AMAC-AM5, Fox-2-Seater, Zephyrus, Decker 1/2 spec line, change the notes as follows:
"Wings up to 16.5in cord chord of single or dual element;"
In P2 Table 1, Bobsy spec line, change the notes as follows:
"Wings up to 16.5in cord chord of single or dual element only;"
In P2 Table 1, Jondal spec line, change the notes as follows:
"Wings up to 16.5in cord chord of single or dual element only;"
#32196 from Formula/Sports Racing Committee · Rule change · TB 22-03 (2022-03 Fastrack)
In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 cars spec line, change the marque as follows:
"AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F500 cars see notes"
In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 cars spec line, change the notes as follows:
"Converted F500 cars must retain suspension compliant with F500 requirements and meet all P2 non-spec line requirements
except minimum width is 55 inches."
#31969 from Formula/Sports Racing Committee · Rule change · TB 22-02 (2022-02 Fastrack)
In P2, GCR section 9.1.8.D.L.c.1, change as follows:
"SCCA approved production based motorcycle engines with a maximum of 4 cylinders and with a maximum displacement
of 1500 1505cc."
In P2, GCR section 9.1.8.D.L.d, change as follows:
"Two Stroke Engine: 2 stroke engines with a maximum displacement of 1200 1205cc and a maximum of 4 cylinders."
In P2, GCR section 9.1.8.D.L.h.1, change as follows:
"Automotive engine based cars use a minimum weight of 1300 1350 lbs. unless otherwise stated in the tables."
#31783 from Formula/Sports Racing Committee · Rule change · TB 22-01 (2022-01 Fastrack)
In P2, GCR section 9.1.8.D.E, change as follows:
"This "Control Area" is located within the plan view rectangular area defined by the rear edge of the front tires, the front edge of
the rear tires, and the entire width of the car's lower surface facing the ground, which includes but is not limited to the floor andany extensions of the floor or aerodynamic attachments to the floor, whether fastened to the bottom or top side of thefloor. Vertical structures such as "turning vanes" or "fins" that are attached to the car anywhere within the "Control Area" toenhance aerodynamics are prohibited."
#31538 from Formula/Sports Racing Committee · Rule change · TB 21-12 (2021-12 Fastrack)
In P2 Engine Table, Spec Line B.1, change as follows:
#31539 from Formula/Sports Racing Committee · Rule change · TB 21-12 (2021-12 Fastrack)
In GCR section 9.1.8.D.E, change as follows:
"This "Control Area" is located within the plan view rectangular area defined by the rear edge of the front tires, and the front
edge of the rear tires, and the entire width of the body of the car’s lower surface facing the ground, which includes but is not
limited to the floor and any extensions of the floor or aerodynamic attachments to the floor, whether fastened to the bottom or
top side of the floor. Vertical structures such as "turning vanes" or "fins" that are attached to the car anywhere within the
"Control Area" to enhance aerodynamics are prohibited."
#31000 from Jeff Shafer · Rule change · TB 21-09 (2021-09 Fastrack)
In P2 Engine Table, Spec Line E, change the notes as follows:
"Must use stock Honda OEM parts as listed in CN Honda K20A-FD2 Parts List found here:
https://www.scca.com/pages/technical-forms-anddownloads. No machining allowed. Balancing, porting, and polishing are
prohibited. Engine rebuilds that include valve jobs and/or cylinder honing must strictly adhere to published factory service
procedures."
#30856 from Club Racing Board · Rule change · TB 21-08 (2021-08 Fastrack)
In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 cars spec line, change the notes as follows:
"Converted F5 cars must retain suspension compliant with F5 requirements and meet all P2 non-spec line requirements except
minimum width is 55 inches."
#30859 from Formula/Sports Racing Committee · Rule change · TB 21-08 (2021-08 Fastrack)
In P2, GCR section 9.1.8.D.D.3, add the following:
"The minimum body width between the front and rear wheels as viewed from above shall not extend inwards beyond a vertical
plane connecting the centerlines of the front and rear tires."
Ralt RT40, Ralt RT41, Swift 008, and Swift 014
A specification table follows in the original; it is not shown here.
#30459 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)
In P2, GCR section 9.1.8.D.D.7.c, make changes as follows:
"Allowed equipment would include batteries, ballast, fire bottles, data recording devices, and cool suit
equipment, providing provided such equipment is securely attached to the car. Tonneau covers are allowed in order to meetminimum dimensions."
#30468 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)
In P2 Table 1, AMAC, Asteck, Cheetah, Decker, Fox, LeGrand, Converted F5 spec line, change as follows:
"Effective 01/01/2021"
In P2 Table 1, AMAC-AM5, Fox-2-Seater, Zephyrus, Decker 1/2 spec line, change as follows:
"Effective 01/01/2021"
In P2 Table 1, FIA Group CN non-composite chassis spec line, change as follows:
"Effective 01/01/2021"
#30560 from Formula/Sports Racing Committee · Rule change · TB 21-05 (2021-05 Fastrack)
In P2 Engine Table, Spec Line B.1, add the maximum valves per cylinder as follows:
"4"
In P2 Engine Table, Spec Line B.2, add the maximum valves per cylinder as follows:
"4"
In P2 Engine Table, Spec Line B.3, add the maximum valves per cylinder as follows:
"4"
#30272 from Formula/Sports Racing Committee · Rule change · TB 21-03 (2021-03 Fastrack)
In P2 Engine Table, add a new spec line as follows:
A specification table follows in the original; it is not shown here.
#29822 from Formula/Sports Racing Committee · Rule change · TB 20-12 (2020-12 Fastrack)
In P2 Engine Table, Spec Line B.1, effective 01-01-2021 change restrictors as follows:
In P2 Engine Table, Spec Line E, effective 01-01-2021 change notes as follows:
"Group CN non-composite chassis with stock Honda K20A-FD2 must use stock Honda intake manifold with 64mm single throttle
body with 55 50mm flat plate intake restrictor at 1500 lbs. minimum weight."
In P2 Table 1, FIA Group CN non-composite chassis spec line, effective 01-01-2021 change restrictor as follows:
P2 Engine Table
Spec
Line Engine Series Max. Displ. (cc)
A specification table follows in the original; it is not shown here.
#29205 from Formula/Sports Racing Committee · Rule change · TB 20-09 (2020-09 Fastrack)
In P2, GCR section 9.1.8.D.E.2, make changes as follows:
"A rear wing is allowed. Wing of single or dual element of any shape or chord length is permitted. As viewed from the side, the
wing and all attached elements (Gurney flaps or any other aerodynamic attachments) must, along its full length and at any
individual measurement point, be fully contained by a rectangle measuring 6 inches by 12 inches. This measurement is to be
made approximately parallel to the centerline of the chassis; the measurement rectangle is not required to be parallel to the
ground. Wing support posts that serve no other purpose shall be exempt from this measurement. to fit in a rectangle of 6 inchheight by 12 inch length a As viewed from the side., end plates must fit in be able to pass through a box 14-inches square. This
measurement is to be made approximately parallel to the centerline of the chassis; the measurement square is not required to be
parallel to the ground.as viewed from the side. The maximum width of any wing shall not be wider than the bodywork maximumwidth specified in d.3 above. Wing may be positioned anywhere behind the main roll hoop.
An alternate wing specification is permitted to allow previously legal "1 meter" wings as used on C converted F formula cars.
The alternate wing is limited to 110cm in width, and must may be single or dual element design of any shape or chord length. As
viewed from the side, the wing and all attached elements (Gurney flaps or any other aerodynamic attachments) must, along its
full length and at any individual measurement point, be fully contained by a rectangle measuring to fit in a rectangle of 9
inches height by 18 inches length as viewed from the side;. This measurement is to be made approximately parallel to the
centerline of the chassis; the measurement rectangle is not required to be parallel to the ground. As viewed from the side, end
plates height is restricted to must be able to pass through a rectangle 14 inches height by 18 inches length. This measurement is
to be made approximately parallel to the centerline of the chassis; the measurement rectangle is not required to be parallel to
the ground.
Note: If a square or rectangular measurement fixture is used to determine compliance of wing or end plate size, the fixture must
be flat and the material thickness must not exceed 0.060 inches.
The maximum width of a wing shall not be wider than the maximum width specified for the body in D.3 above. A wing may be
positioned anywhere behind the main roll hoop. The wing and end plates are to be measured as raced. Wing end plates may not
be attached to the bodywork. Anything attached to or through a wing end plate is considered part of the end plate and thus must
meet applicable dimensions."
#28812 from Formula/Sports Racing Committee · Rule change · TB 20-06 (2020-06 Fastrack)
In P2 Table 1, classify the Elan NP01 as follows:
P2 Table 1 (Spec Line Cars)
A specification table follows in the original; it is not shown here.
#28669 from Mike Davies · Rule change · TB 20-05 (2019-05 Fastrack)
In GCR section 9.1.8.H.7.a, add a new part and renumber the section accordingly:
"15. 55mm flat plate intake restrictor Part # WM303013 as supplied by Enterprises"
In P2 Table 1, Enterprises Sports Racer spec line, change as follows:
"See ESR rules in GCR section 9.1.8. for complete specifications. Effective 4/1/2020, the ESR 2.3L enginemust have either an SIR or a Flat Plate restrictor fitted that meets the peak horsepower specified by theSCCA. The SIR or Flat Plate restrictor must be sized in whole or 0.5mm increments. Dyno data also mustbe submitted for restrictors 1.0 and 2.0mm on either side of the restrictor size that permits the engineto meet the specified peak horsepower."
#27869 from Formula/Sports Racing Committee · Rule change · TB 20-01 (2020-01 Fastrack)
In P2 Table 1, Enterprise Sports Racer line, add to the notes the following:
"Effective 4/1/2020, the ESR 2.3L engine must have either an SIR or a Flat Plate restrictor fitted that
meets the peak horsepower specified by the SCCA. The SIR or Flat Plate restrictor must be sized in whole
or 0.5mm increments. Dyno data also must be submitted for restrictors 1.0 and 2.0mm on either side of
the restrictor size that permits the engine to meet the specified peak horsepower."
#28247 from Greg Bell · Rule change · TB 20-03 (2020-03 Fastrack)
In GCR section 9.1.8.D.L.g, make changes as follows:
"Electronic throttle control (ETC, Fly-by-wire, Drive-by-wire)-: Engines utilizing using stock ECUs with
Drive-By-Wire systems are permitted as long as the throttle pedal activates the original throttle shaft
activation mechanism of the production system."
#27821 from Keith Carter · Rule change · TB 20-01 (2020-01 Fastrack)
In P2 Engine Table, Line B.1, add the following:
"4 cycle Motorcycle-based Kawasaki, Suzuki, Yamaha, Honda, BMW"
#27414 from Formula/Sports Racing Committee · Rule change · TB 19-10 (2019-10 Fastrack)
In the P2 Engine Table, Line E, change the notes as follows:
"Group CN non-composite chassis with stock Honda K20A-FD2 must use stock Honda intake manifold
with 64mm single throttle body with 55mm flat plate intake restrictor at 1500 lbs. minimum
weight (restrictor implementation effective 3/1/2019)."
#27254 from Formula/Sports Racing Committee · Rule change · TB 19-09 (2019-09 Fastrack)
changes
In the P2 engine table, make changes as follows:
A specification table follows in the original; it is not shown here.
#27006 from Formula/Sports Racing Committee · Rule change · TB 19-07 (2019-07 Fastrack)
In P2, GCR section 9.1.8.D.J, add the following:
"7. Power shall not be applied to more than two (2) wheels."
#26246 from AJ Snyder · Rule change · TB 19-04 (2019-04 Fastrack)
In GCR section 9.1.8.H.15, change the weight as follows:
“The car shall weigh 1350 1375 lbs. minimum, including the driver.”
Note from the CRB: Effective 6/1/2019, Enterprises shall reduce the peak horsepower of the
sealed ESR engine (GCR section 9.1.8.H.7.a) to the number specified by the CRB, consistent
with the practice of maintaining all competitors’ horsepower and torque numbers in confidence.
Enterprises shall supply dyno data to the CRB prior to 6/1/2019 to allow review for compliance.
#25777 from Formula/Sports Racing Committee · Rule change · TB 19-01 (2019-01 Fastrack)
restrictors and min. weight
In the P2 Engine Table, effective 3/1/2019, make changes as follows:
Line B.1, stock engine:
Restrictor: 36.5mm 35.0mm
Weight: 1000 1025
Line B.1, modified engine:
Restrictor: 37.5mm 34.0mm
Weight: 1100 1125
Line B.5:
Restrictor: 37.5mm 33.0mm
Weight: 1160 1185
Note from the CRB:
When the P1 and P2 classes were inaugurated in 2014, they were intended to occupy
different spheres of competition, with P1 conceived as the premier class promoting advanced
technology and innovation, and P2 envisioned as a lower-cost alternative through restrictions
on chassis materials, engine power, and vehicle aerodynamics, but the contrasting class
philosophies have not translated into the expected difference in lap times. Despite making
various adjustments to specifications over the past five seasons, the front-running P2 cars
remain capable of producing lap times that to most observers are essentially indistinguishable
from the lap times of P1 cars. Accordingly, effective March 1, 2019, additional changes are
being made to the leading P2 platforms to achieve an appropriate lap-time gap between the
P1 and P2 classes, while leaving the specifications of the P2 spec line cars unchanged to
promote more equal competition between the different types of P2 cars. The CRB will continue
to monitor class performance and make further adjustments as necessary.
#26429 from Formula/Sports Racing Committee · Rule change · TB 19-03 (2019-03 Fastrack)
In P2 Engine Table, Line A.1, change the restrictor as follows:
“40 38mm”
#25595 from Paul Decker · Rule change · TB 19-01 (2019-01 Fastrack)
In P2, Table 1 (Spec Line Cars), add engines as follows:
Marque
Wheelbase inches
max/ Track Max
inches
Weight
Displacement Engine Restrictor Notes
A specification table follows in the original; it is not shown here.
#25816 from Formula/Sports Racing Committee · Rule change · TB 19-01 (2019-01 Fastrack)
In P2 Engine Table, Line E, change the notes as follows:
“Approved engines list: MZR/Duratec, Honda K20A-FD2, Ford Zetec Pinto. For Pinto see line
E, note 2 below. Group CN non-composite chassis with stock Honda K20A-FD2 may must
use stock Honda intake manifold with 64mm single throttle body with 55mm flat plate intake
restrictor at 1500 lbs. minimum weight (restrictor implementation effective 1/1/2019 3/1/2019).”
In P2 Table 1, FIA Group CN non-composite chassis line, change the restrictor as follows:
“Stock 64mm single throttle body with 55mm flat plate restrictor (restrictor implementation
effective 1/1/2019 3/1/2019).”
#25950 from Formula/Sports Racing Committee · Rule change · TB 19-01 (2019-01 Fastrack)
In P2 Engine Table, Line E, change the notes as follows:
“Approved engines list: MZR/Duratec, HondaK 20A-FD2, Ford Zetec Pinto. For Pinto see line
E, note 2 below. Group CN non-composite chassis with stock Honda K20A-FD2 may must
use stock Honda intake manifold with 64mm single throttle body with 55mm flat plate intake
restrictor at 1500 lbs. minimum weight (restrictor implementation effective 1/1/2019). No engine
modifications except for dry sump oil system, ECU mapping, and exhaust system. Must use
stock Honda OEM parts as listed in CN Honda K20A-FD2 Parts List found here: https://www.
scca.com/pages/technical-forms-and-downloads No machining allowed.”
#40356 from Eric O'Brien · Not recommended · Minutes (2026-10 Fastrack)
The Road Racing Competition Committee does not recommend removing the intake restrictors from older spec line cars with
1005 cc engines or increasing the restrictor size for older spec line cars with 1345 cc engines at this time. It would be premature
to make the requested changes in the absence of AiM data to compare the performance capabilities of older spec line cars with
those of other cars in the P2 class. The SCCA Power Factor formula and the collection of on-track data for use with a Balance of
Performance standard have allowed SCCA to fine-tune performance levels in the class. While this system is not perfect, the data
collected at U.S. Majors Tour, Hoosier Super Tour, and Runoffs events has resulted in a good balance among the P2 cars from
which data has been collected. The RRCC encourages members of the P2 community, especially those who race older spec line
cars, to continue to participate in U.S. Majors and Hoosier Super Tour events so that data may be collected and adjustments
made to bring cars to a more competitive position. The RRCC also invites competitors who are unable to attend U.S. Majors
Tour, Hoosier Super Tour, or Runoffs-level events to contact the RRCC to arrange for the shipment and installation of SCCA AiM
data boxes at other types of events. In addition, the RRCC is exploring alternative BoP methodologies that may be appropriate
for P2, such as using full-lap analysis to allow the consideration of metrics such as braking and cornering in addition to straight-
line acceleration in the BoP process. This approach would potentially allow for the collection of data at tracks that are not
currently used for the BoP process due to a lack of suitable straight-line acceleration zones. Comparative data will be analyzed
and the RRCC will make appropriate changes where warranted. Thank you for your continuing interest in the P2 class.
#39776 from Brian Lindstrand · Not recommended · Minutes (2026-03 Fastrack)
The Road Racing Competition Committee does not recommend the underlying request to allow assisted shifting systems on P2
cars that were not originally built with them. To be clear, the P2 rules do not disallow paddle shifters themselves, nor do they
disallow flat shifters that use vacuum-activated throttle blippers. The class rules state that "[d]evices that interact with the
throttle, ignition, or fuel system during a shift operation (for example: ignitions cuts, flat shifters, blippers) are permitted, but no
such devices shall remove the driver's control of the gear change initiation, gear selection or completion." A vacuum-activated
blipper interacts with the throttle, not the transmission; it does not "remove the driver's control of the gear change initiation,
gear selection or completion." The Flatshifter Max system described, however, is an assisted shifting system that actuates gear
changes by electronic (and not mechanical) means. The P2 rules state that "[o]nly mechanical gearshifting mechanisms are
allowed except as permitted by Table 1 Spec Line Cars. This may include cables, rods, or other mechanical linkage systems." The
class rules go on to note that "[t]his prohibition is intended to eliminate the use of electric solenoid shifters . . . and other
devices not mechanically actuated and controlled completely by the driver." Based upon information obtained by the advisory
committee, the RRCC believes that the Flatshifter Max system could be converted to a P2-compliant system by purchasing a
wiring harness and load sensor for the original mechanical linkage and reprogramming the Flatshifter control box. As the rules
state, P2 is intended to be a relatively low-cost sports racing class, and given the relatively low cost of converting the Flatshifter
Max system to a P2-compliant system, the RRCC does not recommend allowing high-cost assisted shifting systems and adding a
weight penalty to offset their advantage, because such a change would likely lead other drivers to believe they need a similar
system to be competitive and would thereby increase the cost to race in P2.
#39435 from Brian Lindstrand · No action required · Minutes (2026-03 Fastrack)
Thank you for your feedback. Please see the response to letter #39776 in the current Fastrack.
#39538 from John MacIntyre · No action required · Minutes (2026-02 Fastrack)
Please see the response to letter #39528 in the current Fastrack.
#39536 from William Niemeyer Jr · No action required · Minutes (2026-02 Fastrack)
Please see the response to letter #39528 in the current Fastrack.
#39535 from Brian Lindstrand · No action required · Minutes (2026-02 Fastrack)
Please see the response to letter #39528 in the current Fastrack.
#39534 from Eric O'Brien · No action required · Minutes (2026-02 Fastrack)
Please see the response to letter #39528 in the current Fastrack.
#39533 from TIMOTHY DAY · No action required · Minutes (2026-02 Fastrack)
Please see the response to letter #39528 in the current Fastrack.
#39528 from Jason Hohmann · Not recommended · Minutes (2026-02 Fastrack)
The Club Racing Board does not recommend these changes at this time. The CRB is aware of concerns about the performance
levels of these platforms and will gather data during the 2026 season to determine if adjustments are warranted.
#39293 from Club Racing Board · Recommended to the Board · Minutes (2025-12 Fastrack)
In GCR, Section 9.1.8.C., change heading as follows:
"C. PROTOTYPE 2 (P2) CLASSIFICATION (Regional Class Only)"
In P2 Spec Lines, P2 Engine Table, change Header as follows:
"P2 Engine Table (Regional Class Only)"
In P2 Spec Lines, Table 1 (Spec Line Cars), change Header as follows:
"Table 1 (Spec Line Cars) (Regional Class Only)"
#38941 from Club Racing Board · Recommended to the Board · Minutes (2025-09 Fastrack)
Effective 1/1/26, in SPORTS RACING CATEGORY, GCR section 9.1.8.C, change the index as follows:
"PROTOTYPE 2 (P2) CLASSIFICATION (Regional Class Only) 602"
Effective 1/1/26, in SPORTS RACING CATEGORY CLASSES, GCR section 9.1.8, change as follows:
"Prototype 2 (P2) Regional Class"
Effective 1/1/26, in SPORTS RACING CATEGORY, GCR section 9.1.8., change as follows:
"Sports racing cars shall be classified into classes as follows:
• A Sports Racing (ASR) Regional Status Only (Former Can-Am and F-5000 allowed if registered prior to 01/01/2003)
• Prototype (P)
• Prototype 2 (P2) Regional Status Only
• Spec Racer Ford (SRF) Regional Status Only
• Spec Racer Ford 3 (SRF3)
• Prototype Electric (PEV) Regional Status Only
• Radical (SR) Regional Status Only"
Effective 1/1/26, in PROTOTYPE 2 (P2), GCR section 9.1.8.C, change the header as follows:
"(Regional Class Only)"
#35836 from Bart Wolf · Not recommended · Minutes (2024-05 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. In the P2 class, Balance of Performance
(BoP) adjustments are not used to equalize top-speed performance, which is heavily affected by the balance of aerodynamic
efficiency versus the downforce package chosen by the driver. If top-speed performance were a basis for BoP adjustment in P2,
no change would be needed: race performance data obtained in several recent events from the subject CN platform and various
cars using motorcycle engine-based platforms does not indicate that the CN platform has a top-speed performance
disadvantage. In P2, the criterion for a BoP adjustment is limited to the analysis of a car's longitudinal acceleration rate in a
speed range before aerodynamic drag has a significant effect—typically between 60 and 100 mph. The data does not
indicate that the CN platform has a performance disadvantage in its acceleration rate, so no justification exists for changing the
size of the CN platform's flat plate intake restrictor at this time.
#35834 from Bart Wolf · No action required · Minutes (2024-05 Fastrack)
Thank you for your letter. The Group CN spec line does not require the original airbox. There are no restrictions on the intake
system upstream of the 64mm single throttle body and 50mm flat plate intake restrictor.
#35833 from Bart Wolf · No action required · Minutes (2024-05 Fastrack)
Thank you for your letter. The Group CN spec line allows competitors to use bodywork permitted in the V de V European Proto
Endurance Challenge series, and the regulations for that series permit the use of carbon fiber bodywork.
#34947 from Eric OBrien · Not recommended · Minutes (2023-12 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The SCCA Power Factor formula and the
collection of on-track data for use with a Balance of Performance (BoP) standard have allowed the CRB to fine-tune performance
levels in the P2 class in recent years. While this system is not perfect, it has helped to maintain parity between the types of cars
from which data has been collected. The current rules have resulted in a good balance among the cars that participate in U.S.
Majors Tour events and at the Runoffs level. The request to eliminate flat plate intake restrictors on 1005 cc and smaller engines
for all Spec Line Cars to improve their top-speed performance relative to other cars would require the CRB to disregard the SCCA
Power Factor formula and the BoP standard, which focuses on balancing performance at speeds where aerodynamic loads have
not yet begun to dominate acceleration rate — namely in the 60-100 mph range. Because aerodynamics can be changed on a
chassis from track to track and, indeed, from session to session, balancing performance in higher speed ranges would result in
data that varies with the aerodynamic tune of a chassis. When the data varies, the primary performance measurement that the
CRB has successfully used in the performance-parity process loses its ability to make accurate comparisons between cars. The
BoP standard is used in P2 to equalize, as closely as possible, acceleration rate between 60 and 100 mph, and the current
restrictors provide that balance for cars in the P2 class, including for Spec Line Cars with engine sizes 1005 cc and less. In order to
make adjustments to the restrictor size and/or weight of a specific car/engine combination, the CRB needs to have on-track data
to be able to make accurate comparisons. If a competitor believes a particular car/engine combination is out of line with the
class BoP standard, it is incumbent upon the competitor to contact the CRB in advance of entering and competing in a U.S.
Majors Tour or Hoosier Super Tour event to allow the CRB an opportunity to gather the relevant data and make appropriate
adjustments if warranted.
#33525 from Armen Megregian · No action required · Minutes (2023-01 Fastrack)
Thank you for your letter. The P2 class was not intended to be structured around Sports 2000 cars, because it was unrealistic if
not impossible to slow the former DSR cars to the performance level of S2000 cars. Instead, the intent of P2 was to allow S2000
owners to improve the performance of their cars by upgrading them to the European Sports 2000 spec, with wings and
upgraded engines. S2000 owners were given an opportunity to update their cars along these lines, but most chose not to do so,
and participation of the cars in the P2 class continued at a level similar to that which led to consolidation of S2000 into P2 from
2014 onward. The SCCA Power Factor of the Group CN cars is in line with that of motorcycle-engine cars in P2, and the on-track
AiM data obtained by the Club Racing Board has consistently shown that two-seat CN cars are at no disadvantage to other cars
in the class.
#33492 from Mark Uhlmann · No action required · Minutes (2023-01 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments.
#33195 from Jason Stine · Not recommended · Minutes (2022-12 Fastrack)
Thank you for your suggestion. The Club Racing Board does not recommend this change. The S2000 class was consolidated into
P2 when it failed to maintain acceptable levels of participation. Despite the great turnouts that S2000 experiences in "one off"
events such as the Mitty, there is no evidence before the SCCA that re-introduction of this class would result in sufficient entries
in U.S. Majors events to meet the 4.0 cars per event participation average in GCR section 3.7.4.C. S2000 cars remain eligible for
competition in P2, although some cars may require certain modifications.
#31861 from JOHN MACINTYRE · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend these changes. P2 is intended to be a relatively low-cost
sports racing class that avoids the use of expensive technology, while P1 is considered to be the premier sports racing class that
promotes advanced technology in design and innovation. One of the purposes of the differing class philosophies is to maintain a
performance gap sufficient to justify having two classes. Carbon fiber chassis springs and composite polymer shock absorbers
are outside the P2 class philosophy.
#31719 from MICHAEL DEVINS · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter. Please see the response to letter #31783 in this Fastrack's Technical Bulletin.
#31702 from Craig Farr · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter. Please see the response to letter #31783 in this Fastrack's Technical Bulletin.
#31686 from Vaughan Scott · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter. Please see the response to letter #31783 in this Fastrack's Technical Bulletin.
#31476 from JOHN MACINTYRE · No action required · Minutes (2021-12 Fastrack)
Thank you for your letter. Please see the response to letter #31539 in this Fastrack's Technical Bulletin.
#31456 from Armen Megregian · Not recommended · Minutes (2021-12 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The statement that there was no data box
on either Ligier at the 2020 Runoffs is incorrect. In fact, AiM on-track data was obtained from a Ligier at the 2020 Runoffs as well
as from both Ligiers at the 2020 June Sprints. The restrictor change effective 1/1/21 was fully supported by the acceleration rate
data obtained at these events. The Club Racing Board will continue to monitor class performance and will make additional data-
based adjustments if needed.
#31015 from Jason Miller · Not recommended · Minutes (2021-09 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The 1205cc two-cycle engine has not
regularly competed in U.S. Majors Tour events, and the Club Racing Board does not have current on-track data for the platform.
If a member interested in running the engine enters and competes in a U.S. Majors Tour event, the Club Racing Board will
arrange to obtain on-track data to assess the platform’s performance potential and make appropriate, data-based adjustments
to the minimum weight. Please see the response to letter #29902 in the January 2021 Fastrack Minutes.
#30536 from Lucas Joslin · Not recommended · Minutes (2021-05 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. P2 is intended to be a relatively low cost
sports racing class, and certain technologies are restricted to further this goal. While the cost of manufacturing aluminum alloy
suspension parts may be somewhat lower now than at the class's inception, revising the rules to allow them would set the
standard and create a perception that they are necessary to reach minimum weight and be competitive, which would ultimately
raise the cost of participation for all competitors in the class. In addition, the Club Racing Board is not aware of any potential
conversion cars that are being excluded from the P2 class by requiring suspension parts such as control arms to be made of steel
or ferrous material.
#30142 from David O’Leary · Not recommended · Minutes (2021-02 Fastrack)
Thank you for your letter. This change is not recommended. The Club Racing Board recently made balance of performance
adjustments to various platforms in the P2 class effective 01/01/2021, including the 2008 and older modified 1.0 liter
motorcycle engine. Please see the response to letter #29822 in the December 2020 Fastrack Technical Bulletin. Time needs to be
afforded these changes to evaluate their effectiveness in improving competition and class participation. The Club Racing Board
will continue to monitor class performance during the 2021 season and will make additional data-based adjustments if needed.
#29902 from Jason Miller · Not recommended · Minutes (2021-01 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change at this time. The 1205cc two-cycle engine
platform has not regularly competed in U.S. Majors Tour events, and as a result the Club Racing Board does not have current on-
track data for the platform. If members interested in running the 1205cc two-cycle engine enter and compete in U.S. Majors
Tour events during the 2021 season, the Club Racing Board will arrange to obtain on-track data to assess the platform’s
performance potential and make adjustments to the minimum weight warranted by the data.
#29871 from Thomas Kaufman · Taken care of · Minutes (2021-01 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments. Please see the responses to letters #29852 and
#29862 in this Fastrack and letter #29822 in the December 2020 Fastrack Technical Bulletin. The Club Racing Board will continue
to monitor class performance during the 2021 season and will make additional data-based adjustments if needed.
#29862 from Greg Gyann · Taken care of · Minutes (2021-01 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments. Please see the responses to letter #29852 in this
Fastrack and letter #29822 in the December 2020 Fastrack Technical Bulletin. Adjustments have been made effective 01-01-2021
to the flat plate intake restrictors on the CN car's stock Honda K20A engine and stock 1.0 liter motorcycle engines manufactured
before the 2009 model year. Time needs to be afforded these changes to evaluate their effectiveness in improving competition
and class participation. The Club Racing Board will continue to monitor performance during the 2021 season and will make
additional data-based adjustments if needed.
#29852 from John Gyann · Not recommended · Minutes (2021-01 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. CN cars use assisted shifting in their original
series, the V de V Challenge Endurance Proto. The intent of the CN spec line is to allow the cars to run in P2 as they ran in the V
de V championship, and to control their performance in P2 with an appropriately-sized flat plate intake restrictor, as determined
by acceleration rate data. The Club Racing Board has made such an adjustment to the CN car's intake restrictor effective 01-01-
2021 and will continue to monitor class performance during the 2021 season. Please see the responses to letter #29822 in the
December 2020 Fastrack Technical Bulletin and letter #28072 in the March 2020 Fastrack Minutes.
#29811 from Robert Kazen · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter. Please see the response to letter #29822 in this Fastrack's Technical Bulletin.
#29793 from Paul Decker · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter. Please see the response to letter #29822 in this Fastrack's Technical Bulletin.
#29792 from Eric O'Brien · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter. Please see the response to letter #29822 in this Fastrack's Technical Bulletin.
#29775 from Keith Carter · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter. Please see the response to letter #29822 in this Fastrack's Technical Bulletin.
#29770 from Vaughan Scott · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter. Please see the response to letter #29822 in this Fastrack's Technical Bulletin.
#29764 from Tim Day Jr. · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter. Please see the response to letter #29822 in this Fastrack's Technical Bulletin.
#29746 from Craig Farr · No action required · Minutes (2020-12 Fastrack)
Thank you for your letter. Please see the response to letter #29822 in this Fastrack's Technical Bulletin.
#29685 from Keith Carter · Not recommended · Minutes (2020-12 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The P2 class is intended to be a relatively
low cost sports racing class, and certain technologies are restricted to further this goal. While the cost of these technologies may
be somewhat lower now than at the inception of the class, revising the rules to allow them would set the standard and create a
perception that they are necessary in order to be competitive, which would ultimately raise the cost of participation for all
competitors in the class.
#28432 from Mike Reupert · Not recommended · Minutes (2020-04 Fastrack)
Thank you for your letter. This change is not recommended at this time. The Club Racing Board will
continue to monitor class performance and will make appropriate, data-based adjustments as
necessary.
#28072 from GREG GYANN · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The Group CN spec
line divides equipment into two categories: (1) certain listed components of the original FIA
homologation that competitors are required to use; and (2) certain listed components permitted by the
premier V de V Endurance Series that competitors are allowed to use. The shifting system is not one of
the original FIA-homologated components that competitors are required to use, but assisted shifting is
one of the components permitted by the V de V Endurance Series that competitors are allowed to use.
The intent of the spec line is to allow CN cars to run in P2 as they run in the V de V Endurance Series, and
to control the cars’ performance in P2 by the use of an appropriately-sized flat plate intake restrictor, as
determined by rate-of-acceleration data obtained by the SCCA. The Club Racing Board will continue to
monitor class performance and will make appropriate, data-based adjustments as necessary.
#27913 from Tim Day Jr · No action required · Minutes (2020-01 Fastrack)
Thank you for your letter. Please see the responses to letter #27815 in this Fastrack and letter #27869 in
this Fastrack's Technical Bulletin.
#27815 from Chuck Bona · No action required · Minutes (2020-01 Fastrack)
Thank you for your letter. The P1 and P2 classes were intended to occupy different spheres of
competition, with P1 conceived as the premier class promoting advanced technology and innovation,
and P2 envisioned as a lower-cost alternative through restrictions on chassis materials, engine power,
and vehicle aerodynamics. One of the purposes of the differing class philosophies was to maintain a
performance gap sufficient to justify having two classes. The Club Racing Board uses an SCCA-developed
Power Factor formula (PF = Weight/Peak HP + Peak Torque/2) to set the weight and power parameters
for classes such as P1 and P2, and periodically collects on-track data to confirm that cars in the same
class have similar rates of longitudinal acceleration from approximately 60 to 100 mph, before a
significant impact from aerodynamic drag comes into play.
The Power Factor numbers developed for P1 and P2 initially provided a sufficient performance gap
between the classes, but over time this gap eroded, and in late 2018 the Club Racing Board announced
adjustments to several P2 platforms to restore a proper gap between the classes. This was the first
significant adjustment since the P2 class was inaugurated in 2014. Before announcing and implementing
these adjustments, the FSRAC and the CRB arranged for the motorcycle engine builder who developed
the P2 restrictor for the SCCA to test the new smaller restrictors and build ECU maps for the proposed
changes. A comparison of the P1 and P2 lap times at the 2019 Runoffs shows that the adjustments have
had their intended effect, and there is currently no plan to make a further across-the-board
performance envelope change to the P2 class.
An individual adjustment to the stock 1.0 liter platform is not warranted at this time. There have been
no creditable stock 1.0 liter efforts in several years, and the available dyno data fully supports the
current restrictor size and minimum weight for this platform. If a competitor fields a representative
stock 1.0 liter effort during the 2020 season, the Club Racing Board will collect on-track data to assess
the car's rate of longitudinal acceleration relative to other P2 cars and, if warranted, make appropriate
adjustments to the platform. Likewise, an adjustment to alter the balance of performance between cars
with automotive-based engines and those with motorcycle-based engines is not supported by the data
collected during the 2019 Runoffs, where the leading examples of each type of car were closely grouped
both on track and in terms of their rates of longitudinal acceleration below 100 mph. The Club Racing
Board will continue to monitor class performance and will make individual changes based on credible
performance data.
#27696 from Thomas Kaufman · No action required · Minutes (2019-12 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments. Please see the response
to letter #27650 in this Fastrack.
#27650 from Craig Farr · Not recommended · Minutes (2019-12 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. A review of the
available P2 Stock 1L motorcycle engine data supports the restrictor size at the current minimum
weight. The CRB will continue to monitor the class to collect data from current competitive Stock 1L
motorcycle engined cars running at or near the minimum weight for the restrictor size.
#26968 from Armen Megregian · Not recommended · Minutes (2019-07 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The
Club Racing Board considered the points you raise in reaching a solution to a supply
problem with the original engines. Please see the response to letter #25595, January
2019 Fastrack Technical Bulletin. The Club Racing Board will continue to monitor class
performance and will make appropriate adjustments as necessary.
#26616 from Formula/Sports Racing Committee · Member advisory · Minutes (2019-04 Fastrack)
balance of performance
Thank you for your letter. P2 competitors are advised that as data is collected on additional
P2 engine platforms this data will be used to continue the process of adjusting the P1-P2
performance gap and balancing performance within the P2 class.
#26375 from Michael Reupert · Taken care of · Minutes (2019-03 Fastrack)
Thank you for your letter. Please see the response to letter #26429, March Technical Bulletin.
#26110 from Vaughan Scott · Not recommended · Minutes (2019-02 Fastrack)
Thank you for your letter. The CRB does not recommend these changes at this time. The CRB
will continue to monitor class performance and will make further adjustments as necessary.
#25933 from John Bosso · Taken care of · Minutes (2019-01 Fastrack)
Thank you for your letter. Please see the response to letter #25595, Technical Bulletin.
#25918 from George Dean · Taken care of · Minutes (2019-01 Fastrack)
Thank you for your letter. Please see the response to letter #25595, Technical Bulletin.
#25701 from Bill Crowley · Taken care of · Minutes (2019-01 Fastrack)
Thank you for your letter. Please see the responses to letter #25257, and letters #25777 and
#25816, Technical Bulletin.
#25566 from Armen Megregian · Taken care of · Minutes (2019-01 Fastrack)
Thank you for your letter. Please see the responses to letter #25257, and letters #25777 and
#25816, Technical Bulletin.
#25404 from Armen Megregian · Taken care of · Minutes (2019-01 Fastrack)
Thank you for your letter. Please see the responses to letter #25257, and letters #25777 and
#25816, Technical Bulletin.
#25257 from Armen Megregian · Not recommended · Minutes (2019-01 Fastrack)
Thank you for your letter. The CRB does not recommend this change. Please see the
responses to letters #25777 and #25816, Technical Bulletin.