Support for Reinstatement of P2 as a Runoffs Class
#39212 from Chris Vian · Taken care of · Minutes (2025-12 Fastrack)
We appreciate your perspective and feedback. Please see letter #39293 in current Fastrack.
BoP Lab / Drivers / Chris Vian
Chris Vian 4 letters to Fastrack
Against the front of the class, by track and class
| Track | Class | Sessions | Typical gap to class best | Closest |
|---|---|---|---|---|
| Buttonwillow Raceway Park (2.92 mi) | P1 | 5 | +8.035s (8.46%) | +6.644s (6.99%) |
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.
Buttonwillow Raceway Park (2.92 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cal Club 2024 | Grp 6 FX,FA,FC,FE2,P1,P2 Race 2 | P1 | 49 | Elan DP02 | 4/6 | 1:45.184 | 1:35.782Jim Devenport | +9.402s (9.82%) | 126.76/6 | 136.2Jim Devenport | -9.5 mph (-7.0%) |
| Cal Club 2024 | Grp 6 FX,FA,FC,FE2,P1,P2 Race 1 | P1 | 49 | Elan DP02 | 6/7 | 1:43.024 | 1:34.989Chip Romer | +8.035s (8.46%) | 127.17/7 | 138.2Aaron Bailey | -11.2 mph (-8.1%) |
| Cal Club 2024 | Grp 6 FX,FA,FC,FE2,P1,P2 Qual 2 | P1 | 49 | Elan DP02 | 6/6 | 1:42.096 | 1:33.133Chip Romer | +8.963s (9.62%) | 126.56/6 | 137.3Aaron Bailey | -10.8 mph (-7.9%) |
| Cal Club 2024 | Grp 6 FX,FA,FC,FE2,P1,P2 Qual 1 | P1 | 49 | Elan DP02 | 7/7 | 1:42.374 | 1:34.964Chip Romer | +7.410s (7.80%) | 123.67/7 | 137.8Aaron Bailey | -14.2 mph (-10.3%) |
| Cal Club 2024 | Grp 6 FX,FA,FC,FE2,P1,P2 Prac | P1 | 49 | Elan DP02 | 5/5 | 1:41.659 | 1:35.015Jim Devenport | +6.644s (6.99%) | 125.95/5 | 138.5Chip Romer | -12.6 mph (-9.1%) |
Letters to Fastrack
I support Letter #36742
#36894 from Chris Vian · No action required · Minutes (2024-11 Fastrack)
Thank you for your letter. The Club Racing Board appreciates your comments. Please reference our response to letter #36742
in this Fastrack.
P1 Elan DP02 Sealed Engine
#31168 from Chris Vian · Not recommended · Minutes (2021-11 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The sealed engines are no longer viable
because they have not been used by IMSA for several years and SCCA cannot ensure that power would remain at the level that
previously allowed them to run without an inlet restrictor in P1. While new seals conceivably could be applied after engine
rebuilds, the Club Racing Board and Tech officials would have no means of verifying that the proprietary parts that originally
allowed the engines to run without an inlet restrictor were used during each rebuild. Moreover, even if it were possible to
confirm that the proper parts were used, this would not eliminate the sealed engines' inherent problem. DP02s with sealed
engines are outside the P1 performance envelope – when they were legal in P1, the data showed that their trap speeds were 12-
15 mph slower than the trap speeds of other cars in the class. As a result, DP02s with sealed engines were rarely entered when
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they were legal in P1. For all these reasons, the best option for the class is to do what other DP02 owners have done since 2017:
upgrade the engine components and install the required 30mm SIR, which balances power with much greater precision than
could be achieved by attempting to prescribe allowable parts and modifications for individual engine applications.
P1 2.3L sealed engine
#30057 from Chris Vian · Not recommended · Minutes (2021-02 Fastrack)
Thank you for your letter. The Club Racing Board does not recommend this change. The requirements for 2.3L engines have not
been changed for 2021. The rules have required all 2.3L engines to use a single inlet restrictor (SIR) since the sealed 2.3L engine
was eliminated at the end of 2017. Please see the responses to letter #22614 in the October 2017 Fastrack Technical Bulletin,
letter #23875 in the March 2018 Fastrack Technical Bulletin, and letter #28018 in the February 2019 Fastrack Minutes. Members
may continue to run 2.3L engines in compliance with Spec Line G of the engine table.