STU STU TCR GT3U Solution.
#39147 from Eric Heinrich · Not recommended · Minutes (2026-01 Fastrack)
TCR cars are no longer in STU. Adjustments have been made and will continue to be made throughout the year.
BoP Lab / Drivers / Eric Heinrich
Eric Heinrich 45 letters to Fastrack
Against the front of the class, by track and class
| Track | Class | Sessions | Typical gap to class best | Closest |
|---|---|---|---|---|
| Summit Point Raceway (2.00 mi) | STU | 1 | +0.000s (0.00%) | +0.000s (0.00%) |
| Daytona International Speedway (3.56 mi) | STU | 5 | +0.000s (0.00%) | +0.000s (0.00%) |
Gap is the driver's best lap in a session against the fastest lap in their class in that same session (zero is fastest in class), shown as time lost and as a share of the lap, so conditions cancel out and tracks can be compared. Typical is the median session.
Summit Point Raceway (2.00 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Majors Apr 2016 | All hardship | STU | 7X | NER | 1/1 | 1:59.062 | 1:59.062you | +0.000s (0.00%) |
Daytona International Speedway (3.56 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Runoffs 2015 | STU Race | STU | 10 | NER | 17/17 | 2:06.756 | 2:06.756you | +0.000s (0.00%) | |||
| Runoffs 2015 | GT3/STU/T2 Qualifying 4 | STU | 10 | NER | 2/16 | 2:08.464 | 2:08.111John Schmitt | +0.353s (0.28%) | |||
| Runoffs 2015 | GT3/STU/T2 Qualifying 3 | STU | 10 | NER | 14/13 | 2:21.502Ian Girvan | |||||
| Runoffs 2015 | GT3/STU/T2 Qualifying 2 | STU | 10 | NER | 12/11 | 2:09.153John Schmitt | |||||
| Runoffs 2015 | GT3/STU/T2 Qualifying 1 | STU | 10 | NER | 1/16 | 2:05.494 | 2:05.494you | +0.000s (0.00%) |
Letters to Fastrack
STU Traditional STU Cars - Dashboards
#39061 from Eric Heinrich · Not recommended · Minutes (2025-12 Fastrack)
We appreciate your perspective and feedback. Your request is not within class philosophy.
STU Cars Unable to Make Weight in STU
#38590 from Eric Heinrich · No action required · Minutes (2025-09 Fastrack)
Thank you for your letter.
STU TCR cars in STU
#38589 from Eric Heinrich · Taken care of · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see letter #38723 in current Fastrack.
STU Re #38007: 275 Tires in STU
#38588 from Eric Heinrich · No action required · Minutes (2025-09 Fastrack)
Thank you for your letter.
STU Drivetrain Error Correction/Language Cleanup
#37991 from Eric Heinrich · Recommended to the Board · Minutes (2025-05 Fastrack)
In GCR, Section 9.1.4.L.6., change as follows:
"(Effective 6/1/2025) 6. Any limited-slip or locking differential is permitted"
STL/STU Fender Flare Language Revisited
#37088 from Eric Heinrich · Not recommended · Minutes (2024-12 Fastrack)
Thank you for your letter. Rule language is adequate, no action required.
GT3 Merge - with T2 instead?
#37072 from Eric Heinrich · No action required · Minutes (2024-12 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments.
GT3 Merge - with T2 instead?
#37071 from Eric Heinrich · No action required · Minutes (2024-12 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments (really!)
More Info on Tire Equivalency and Weights STU-GT3
#37063 from Eric Heinrich · No action required · Minutes (2024-12 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments and information, which will be considered as this
merger proceeds.
RE Letter 36958 (STU-GT3 merge) in October Fastrack
#37034 from Eric Heinrich · No action required · Minutes (2024-12 Fastrack)
Thank you for your letter. CRB carefully considered five years of HST and runoffs race data and results. It does remain to be
determined if the changes (starting 2025) will need adjustment for BoP.
CRB, and SCCA intend to have equal GT3/STU BoP parity before it becomes one class in 2026. Data will be collected starting early
2025 and CRB intends to make quick changes when supported by DATA (and race observation and results).
Many possibilities exist to create parity between STU and GT3 (if warranted) including more weight on GT3 cars, less penalty for
STU advanced aero option etc. CRB tries to suggest relatively low cost options (if possible) to promote participation.
CRB understands that some STU cars will have difficulty reaching the allowed 4.0 percent weight reduction. CRB (and STAC) are
currently discussing options that help with weight reduction including composite front fenders, change stock dash requirement
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and more. Again, hopefully relatively low cost changes.
STU /GT3 merge (duplicate of letter #36908 sent to ST committee)
#36909 from Eric Heinrich · No action required · Minutes (2024-12 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments.
STU/GT3 merge
#36908 from Eric Heinrich · No action required · Minutes (2024-12 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments. The AC and CRB liaisons will be considering your
input as changes are implemented.
Penalties for Contact
#35893 from Eric Heinrich · Not recommended · Minutes (2024-07 Fastrack)
Thank you for your letter. Due to the diverse racing in SCCA, a one-size-fits-all penalty structure is not necessarily
appropriate for all situations. Driver history is now being tracked, and SCCA stewards are stressing consistency across
events.
STU E&O STU NA Weight Chart.
#33737 from Eric Heinrich · Rule change · TB 23-03 (2023-03 Fastrack)
In STU, GCR Section 9.1.4.1.H.1. chart, Factory Engine Displacement (cc) Minimum Weight (lbs), change as follows:
"2450 2596 2595"
"2600 2860 2710"
Request to clean up the racing : start using modified 13/13
#32664 from Eric Heinrich · Not recommended · Minutes (2022-09 Fastrack)
Thank you for your letter regarding on track driving behavior and suggestions on consequences. Obviously, this is a serious
problem and the Green-To-Checker initiative is drawing attention to and giving voice to the problem. The CRB is making some
changes in consequences and believes there are currently sufficient rules to properly address these issues; many of the
problems can be addressed with more assertive application of existing rules by stewards, by participants' willingness to become
engaged through the protest process and drivers taking more responsibility for not overdriving leading to incidents that impact
track time. Again thank you for taking the time to provide your thoughts.
STU 32393 Response - Overly Favors MX-5
#32470 from Eric Heinrich · Not recommended · Minutes (2022-04 Fastrack)
Thank you for your letter. The change was made based on collected data and we will continue to monitor data and adjust as
necessary.
STU Letter #31449 NA Engine Weight Breaks
#31664 from Eric Heinrich · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
STU Request to Remove 9 Inch Wheels
#31650 from Eric Heinrich · Not recommended · Minutes (2022-01 Fastrack)
Thank you for your letter. In the interest of class stability, your request is not recommended.
STU Request to Adjust Weight Adders for Large Displacement NA Engines
#31649 from Eric Heinrich · Taken care of · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see letter #31449 in current Fastrack.
STL Approve BMW N45B20 2.0L 11:1 Non-USDM Engine for STL
#31648 from Eric Heinrich · Not recommended · Minutes (2022-01 Fastrack)
Thank you for your letter. Please see 9.1.4.G.2. which provides a very specific list of information (VTS, shop manual etc) which
must be provided to request a non USDM engine for consideration.
STU Request to Remove BMW S54B32 OEM from STU Table B
#31647 from Eric Heinrich · Not recommended · Minutes (2022-02 Fastrack)
Thank you for your letter. At this time it is not recommended.
STL/STU Request for Intake Porting Clarification
#31646 from Eric Heinrich · No action required · Minutes (2022-01 Fastrack)
Thank you for your letter. Please see letter #31323 in current Fastrack.
Request to Create a LS3 class
#31447 from Eric Heinrich · Not recommended · Minutes (2021-12 Fastrack)
Thank you for your letter. This request is best handled within your region. Regions have the ability to create new classes and
rulesets.
Hardship vs Warm Up Laps
#30430 from Eric Heinrich · Rule change · TB 21-05 (2021-05 Fastrack)
In GCR, Appendix F. Technical Glossary, add the following:
"Hardship Lap – The driver does not take a complete lap. The driver enters the track at Pit Out and exits the track at Pit In without
making a complete lap."
"Warmup Session – A warmup session is a time certain session of laps that are intended to allow drivers to test their vehicles
prior to race sessions."
Request Trailing Arm clarification
#30030 from Eric Heinrich · No action required · Minutes (2021-02 Fastrack)
Thank you for your letter. Rules are adequate as written, rules from Road Racing do not cross over to Time Trials. If you are
requesting a compliance review, please see GCR 8.1.4.
STU Re WDYT #26402 ITB's
#29972 from Eric Heinrich · No action required · Minutes (2021-02 Fastrack)
Thank you for your letter. We will take your suggestions into consideration.
STU RE: STU WDYT #26402 FPR's
#29971 from Eric Heinrich · No action required · Minutes (2021-02 Fastrack)
Thank you for your letter. We will take your suggestions into consideration.
STL/STU Re: #27532 tire widths - smart call, support response
#28549 from Eric Heinrich · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter.
STU Request to classify 12-15 Audi S5 Supercharged in STU
#28504 from Eric Heinrich · Not recommended · Minutes (2020-06 Fastrack)
Thank you for your letter. After a discussion on 3 separate calls, it has been determined it is too much
for STU.
STL/STU Request to allow polycarbonate for sunroof replacement
#28188 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. Sun roof replacement rules are adequate as written.
STU Request BoP on the Lotus
#27637 from Eric Heinrich · Rule change · TB 20-04 (2020-04 Fastrack)
In STU, Lotus Elise Cup R Spec Lines, change weight as follows:
"2200 2300"
In STU, Lotus Elise SC/ LotusExige SC Spec Lines, change weights as follows:
"2200 2300"
"2400 2500"
STU Request to fix the TIR chart errors
#27636 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The CRB does not believe STU FWD weights need to be adjusted. The CRB will
continue to monitor performance.
STU Request FWD weight adjustment
#27635 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The CRB does not believe STU FWD weights need to be adjusted. The CRB will
continue to monitor performance.
STU Request a mid-engine placement adjuster
#27634 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The CRB does not believe STU mid engines chassis need to be adjusted. The
CRB will continue to monitor performance.
STU Request advanced aero changes
#27633 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. Current advanced aero rules are adequately written.
STU Request small displacement NA engines intake/tb
#27632 from Eric Heinrich · No action required · Minutes (2020-03 Fastrack)
Thank you for your letter. STU aftermarket intake manifolds are approved on a case by case basis.
STU Request to adjust NA chart to graduated
#27631 from Eric Heinrich · Not recommended · Minutes (2020-04 Fastrack)
Thank you for your letter. The current STU weight chart is sufficient as written.
STU Request small displacement NA engines need help
#27630 from Eric Heinrich · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The CRB does not believe STU small displacement engines need to be
adjusted. The CRB will continue to monitor performance.
T2/T3/T4 Review roll cage standards
#27099 from Eric Heinrich · No action required · Minutes (2019-08 Fastrack)
Thank you for your letter. Your input is noted and appreciated.
T2/T3/T4 Request for Audi S4/S5 Brakes
#27061 from Eric Heinrich · Recommended to the Board · Minutes (2019-09 Fastrack)
In T2, Audi S4 (12-14), make changes to the notes as follows:
"S tronic transmission permitted at 3650 lbs. Ratios: 3.88, 2.24, 1.56, 1.18, 0.92, 0.75, 0.62. Max spring
rate 1100#/in. front and rear. F sway bar 30mm, rear sway bar 24mm SPC front upper arms 81360.
Brembo brake Kit PN: 3K2.8032A permitted. Q5 OEM brake calipers, part #8R0615107G and
8R0615108G permitted. 2-Piece rotors max diameter 345 mm permitted, B Separate coolant reservoir
for the water to air intercooler permitted. 60mm flat plate restrictor required."
In T2, Audi S5 (13-14), make changes to the notes as follows:
"S tronic transmission permitted at 3650 lbs. Ratios: 3.88, 2.24, 1.56, 1.18, 0.92, 0.75, 0.62. Max spring
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rate 1100#/in. front and rear. F sway bar 30mm, rear sway bar 24mm SPC front upper arms 81360.
Brembo brake Kit PN: 3K2.8032A permitted. Q5 OEM brake calipers, part #8R0615107G and
8R0615108G permitted. 2-Piece rotors max diameter 345 mm permitted, Separate coolant reservoir for
the water to air intercooler permitted. 60mm flat plate restrictor required."
In T3, Audi S4 (12-14), make changes to the notes as follows:
"40mm flat plate restrictor required. S tronic transmission permitted at 3725 lbs. Ratios: 3.88, 2.24, 1.56,
1.18, 0.92, 0.75, 0.62. Max spring rate 800#/in. front and rear. F sway bar 30mm, rear sway bar 24mm
SPC front upper arms 81360. Brembo brake Kit PN: 3K2.8032A permitted. 2-Piece rotors max diameter
345 mm permitted, 19x10 wheels allowed + 100 lbs. Q5 OEM brake calipers, part #8R0615107G and
8R0615108G permitted. Brake dust shields L&R part #3D0615311C and #3D0615312C are permitted. Air
guide L&R part #3D0615447E and #3D0615448E are permitted."
In T3 Audi S5 (13-14), make changes to the notes as follows:
"40mm flat plate restrictor, 800 max F&R spring rate. F sway bar 30mm, rear sway bar 24mm SPC front
upper arms 81360 S tronic transmission permitted at 3725 lbs. Ratios: 3.88, 2.24 ,1.56, 1.18, 0.92, 0.75,
0.62. Brembo brake Kit PN: 3K2.8032A permitted. 2-Piece rotors max diameter 345 mm
permitted, 19x10 wheels allowed + 100 lbs. Q5 OEM brake calipers, part #8R0615107G and 8R0615108G
permitted. Brake dust shields L&R part #3D0615311C and #3D0615312C are permitted. Air guide L&R
part #3D0615447E and #3D0615448E are permitted."
Note from the CRB: Please run this car prior to making any more requests.
STU Adapting Rules to Attract
#27013 from Eric Heinrich · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter.
Address On Track Behavior
#26938 from Eric Heinrich · No action required · Minutes (2019-07 Fastrack)
Thank you for your letter. Please refer to letter #26270 posted in July 2019 Fastrack.
T2/T3/T4 Response to Roll cages
#26812 from Eric Heinrich · No action required · Minutes (2019-06 Fastrack)
Thank you for your letter. The Touring Advisory Committee and Club Racing Board are working on changes.
STU Request to remove S54 spec line from STU
#26681 from Eric Heinrich · Taken care of · Minutes (2019-05 Fastrack)
Thank you for your letter. The Club Racing Board will continue to monitor class performance.