GT2 Follow Up to Letter #37763
#38275 from Michael Quattlebaum · Not recommended · Minutes (2025-07 Fastrack)
Thank you for your letter. Please see response to letter #37763 in June Fastrack.
BoP Lab / Drivers / Michael Quattlebaum
Michael Quattlebaum 3 letters to Fastrack
Against the front of the class, by track and class
| Track | Class | Sessions | Typical gap to class best | Closest |
|---|---|---|---|---|
| Road America (4.05 mi) | GT2 | 15 | +5.106s (3.72%) | +3.012s (2.23%) |
| Road America | GT2 | 1 | +33.389s (25.26%) | +33.389s (25.26%) |
| Hallett Motor Racing Circuit (1.80 mi) | GT2 | 11 | +0.464s (0.59%) | +0.000s (0.00%) |
| NOLA Motorsports Park (2.74 mi) | GT2 | 11 | +4.690s (4.58%) | +0.000s (0.00%) |
| Virginia International Raceway (3.27 mi) | GT2 | 1 | +1.803s (1.60%) | +1.803s (1.60%) |
| Unknown track (3.27 mi) | GT2 | 8 | +4.370s (3.87%) | +2.407s (2.15%) |
| Circuit of the Americas (3.41 mi) | GT2 | 4 | +3.108s (2.29%) | +2.680s (1.96%) |
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.
Road America (4.05 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Runoffs 2025 | GT2 National Championship Race | GT2 | 22 | Chevrolet Corvette | 15/13 | 2:13.447John Atwell | |||||
| Runoffs 2025 | GT2 Qual 2 | GT2 | 22 | Chevrolet Corvette | 11/16 | 2:19.009 | 2:11.807Brad McAllister | +7.202s (5.46%) | 157.611/16 | 161.4Brad McAllister | -3.7 mph (-2.3%) |
| Runoffs 2025 | GT2 Qual 1 | GT2 | 22 | Chevrolet Corvette | 11/16 | 2:18.863 | 2:12.167John Atwell | +6.696s (5.07%) | 150.715/16 | 160.4Charlie Peter | -9.8 mph (-6.1%) |
| Runoffs 2025 | Wed Grp 10 GT1 GT2 T1 Run 2 | GT2 | 22 | Chevrolet Corvette | 9/12 | 2:45.581 | 2:12.192Jonathan Start | +33.389s (25.26%) | 128.811/12 | 170.1Jonathan Start | -41.3 mph (-24.3%) |
| Runoffs 2025 | Wed Grp 10 GT1 GT2 T1 Run 1 | GT2 | 22 | Chevrolet Corvette | 9/13 | 2:19.591 | 2:12.013John Atwell | +7.578s (5.74%) | 157.98/13 | 169.4Jonathan Start | -11.4 mph (-6.8%) |
| Runoffs 2024 | GT2 Race | GT2 | 22 | Chevrolet Corvette | 13/23 | 2:17.394 | 2:13.311John Atwell | +4.083s (3.06%) | 154.314/23 | 162.9Jonathan Start | -8.6 mph (-5.3%) |
| Runoffs 2024 | GT2 Qual 3 | GT2 | 22 | Chevrolet Corvette | 8/22 | 2:15.433 | 2:11.860Charlie Peter | +3.573s (2.71%) | 154.715/22 | 162.0Jonathan Start | -7.3 mph (-4.5%) |
| Runoffs 2024 | GT2 Qual 2 | GT2 | 22 | Chevrolet Corvette | 10/20 | 2:16.177 | 2:12.624Brad McAllister | +3.553s (2.68%) | 156.113/20 | 164.3Jonathan Start | -8.2 mph (-5.0%) |
| Runoffs 2024 | GT2 Qual 1 | GT2 | 22 | Chevrolet Corvette | 12/20 | 2:17.644 | 2:13.108Brad McAllister | +4.536s (3.41%) | 152.913/20 | 162.0Jonathan Start | -9.1 mph (-5.6%) |
| Runoffs 2024 | Run 2 GT1, GT2, GT3 Mon | GT2 | 22 | Chevrolet Corvette | 11/17 | 2:20.121 | 2:14.258John Atwell | +5.863s (4.37%) | 153.210/17 | 162.7John Atwell | -9.4 mph (-5.8%) |
| Runoffs 2024 | Run 1 GT1, GT2, GT3 Mon | GT2 | 22 | Chevrolet Corvette | 6/18 | 2:17.910 | 2:14.898Jared Odrick | +3.012s (2.23%) | 154.48/18 | 161.4Jonathan Start | -7.0 mph (-4.3%) |
| June Sprints 2024 | Grp 6 GT1 GT2 GT3 GTX T1 AS Race 2 | GT2 | 22 | Chevrolet Corvette | 9/24 | 2:20.861 | 2:16.689Charlie Peter | +4.172s (3.05%) | 152.011/24 | 159.7Gian Buffomante | -7.7 mph (-4.8%) |
| June Sprints 2024 | Grp 6 GT1 GT2 GT3 GTX T1 AS Race 1 | GT2 | 22 | Chevrolet Corvette | 9/22 | 2:39.991 | 2:33.801Brad McAllister | +6.190s (4.02%) | 24.120/22 | 153.1Griffin Fujii | -129.0 mph (-84.2%) |
| June Sprints 2024 | Grp 6 GT1 GT2 GT3 GTX T1 AS Qual | GT2 | 22 | Chevrolet Corvette | 9/22 | 2:22.204 | 2:17.098Brad McAllister | +5.106s (3.72%) | 153.411/22 | 161.6Jonathan Start | -8.2 mph (-5.1%) |
| June Sprints 2024 | Grp 6 GT1 GT2 GT3 GTX T1 AS Prac | GT2 | 22 | Chevrolet Corvette | 14/23 | 2:25.493 | 2:18.206Charlie Peter | +7.287s (5.27%) | 154.98/23 | 162.2Jonathan Start | -7.4 mph (-4.5%) |
Road America
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Runoffs 2025 | Wed Grp 10 GT1 GT2 T1 Run 2 | GT2 | 22 | Chevrolet Corvette | 9/12 | 2:45.581 | 2:12.192Jonathan Start | +33.389s (25.26%) | 128.811/12 | 170.1Jonathan Start | -41.3 mph (-24.3%) |
Hallett Motor Racing Circuit (1.80 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AVRG Green Country Grand Prix 2025 | Grp 5 GT1 GT2 GTX T1 T2 AS Race 2 | GT2 | 22 | Chevrolet Corvette | 9/10 | 1:17.464 | 1:16.914John Atwell | +0.550s (0.72%) | 120.54/10 | 124.1Mark Kirby | -3.7 mph (-2.9%) |
| AVRG Green Country Grand Prix 2025 | Grp 5 GT1 GT2 GTX T1 T2 AS Race 1 | GT2 | 22 | Chevrolet Corvette | 10/13 | 1:17.021 | 1:15.038John Atwell | +1.983s (2.64%) | 121.03/12 | 126.3Mark Kirby | -5.3 mph (-4.2%) |
| AVRG Green Country Grand Prix 2025 | Grp 5 GT1 GT2 GTX T1 T2 AS Qual 1 | GT2 | 22 | Chevrolet Corvette | 2/13 | 1:17.357 | 1:15.115John Atwell | +2.242s (2.98%) | 121.54/13 | 126.3John Atwell | -4.8 mph (-3.8%) |
| AVRG Green Country Grand Prix 2025 | PM Test | GT2 | 22 | Chevrolet Corvette | 1/9 | 1:18.970 | 1:16.622Jorge Nazario | +2.348s (3.06%) | |||
| AVRG Green Country Grand Prix 2024 | Grp 2 GT1 GT2 GT3 GTX T1 AS Race 2 | GT2 | 22 | Chevrolet Corvette | 1/11 | 1:18.318 | 1:18.176Mark Kirby | +0.142s (0.18%) | 121.24/11 | 124.7Mark Kirby | -3.4 mph (-2.8%) |
| AVRG Green Country Grand Prix 2024 | Grp 2 GT1 GT2 GT3 GTX T1 AS Qual 2 | GT2 | 22 | Chevrolet Corvette | 10/5 | 1:18.680Mike McGinley | |||||
| AVRG Green Country Grand Prix 2024 | Grp 2 GT1 GT2 GT3 GTX T1 AS Race 1 | GT2 | 22 | Chevrolet Corvette | 2/12 | 1:18.559 | 1:18.095Mark Kirby | +0.464s (0.59%) | 121.53/12 | 123.8Mark Kirby | -2.4 mph (-1.9%) |
| AVRG Green Country Grand Prix 2024 | Grp 2 GT1 GT2 GT3 GTX T1 AS Qual 1 | GT2 | 22 | Chevrolet Corvette | 1/13 | 1:17.442 | 1:17.442you | +0.000s (0.00%) | 121.73/13 | 124.7Mark Kirby | -2.9 mph (-2.3%) |
| AVRG Green Country Grand Prix 2024 | Grp2 - Session 4 | GT2 | 22 | Chevrolet Corvette | 1/7 | 1:18.732 | 1:18.732you | +0.000s (0.00%) | 122.02/7 | 124.9Mark Kirby | -2.9 mph (-2.3%) |
| AVRG Green Country Grand Prix 2024 | Grp2 - Session 3 | GT2 | 22 | Chevrolet Corvette | 1/9 | 1:19.212 | 1:19.212you | +0.000s (0.00%) | 121.02/9 | 123.6Mark Kirby | -2.6 mph (-2.1%) |
| AVRG Green Country Grand Prix 2024 | Morning | GT2 | 22 | Chevrolet Corvette | 1/7 | 1:20.580 | 1:20.098Mark Kirby | +0.482s (0.60%) | 1.33/7 | 103.1Bryan Kerrick | -101.8 mph (-98.7%) |
NOLA Motorsports Park (2.74 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Voodoo Rendevoux 2025 | Grp 7 GT1 GT2 GTX T1 AS Race 2 | GT2 | 22 | Chevrolet Corvette | 2/8 | 1:47.448 | 1:43.126John Atwell | +4.322s (4.19%) | |||
| Voodoo Rendevoux 2025 | Grp 7 GT1 GT2 GTX T1 AS Qual 2 | GT2 | 22 | Chevrolet Corvette | 3/7 | 1:46.077 | 1:40.734John Atwell | +5.343s (5.30%) | |||
| Voodoo Rendevoux 2025 | Grp 7 GT1 GT2 GTX T1 AS Race 1 | GT2 | 22 | Chevrolet Corvette | 9/7 | 1:43.658John Atwell | |||||
| Voodoo Rendevoux 2025 | Grp 7 GT1 GT2 GTX T1 AS Qual 1 | GT2 | 22 | Chevrolet Corvette | 4/9 | 1:47.131 | 1:42.441John Atwell | +4.690s (4.58%) | |||
| Voodoo Rendevoux 2025 | PM | GT2 | 22 | Chevrolet Corvette | 2/6 | 1:48.452 | 1:42.788John Atwell | +5.664s (5.51%) | |||
| Lone Star Voodoo Reboot 2024 | Grp 6 GT1,GT2,GT3,GTX,T1,AS Race 2 | GT2 | 22 | Chevrolet Corvette | 3/12 | 1:46.430 | 1:43.281Barry Boes | +3.149s (3.05%) | |||
| Lone Star Voodoo Reboot 2024 | Grp 6 GT1,GT2,GT3,GTX,T1,AS Qual 2 | GT2 | 22 | Chevrolet Corvette | 3/11 | 1:46.543 | 1:44.183Barry Boes | +2.360s (2.27%) | |||
| Lone Star Voodoo Reboot 2024 | Grp 6 GT1,GT2,GT3,GTX,T1,AS Race 1 | GT2 | 22 | Chevrolet Corvette | 2/13 | 1:49.036 | 1:43.901Barry Boes | +5.135s (4.94%) | |||
| Lone Star Voodoo Reboot 2024 | Grp 6 GT1,GT2,GT3,GTX,T1,AS Qual 1 | GT2 | 22 | Chevrolet Corvette | 3/9 | 1:59.223 | 1:46.063Bryan Kerrick | +13.160s (12.41%) | |||
| Lone Star Voodoo Reboot 2024 | Test 3 Grp 5 | GT2 | 22 | Chevrolet Corvette | 1/6 | 2:11.030 | 2:11.030you | +0.000s (0.00%) | |||
| Lone Star Voodoo Reboot 2024 | Test 2 Grp 5 | GT2 | 22 | Chevrolet Corvette | 4/6 | 2:20.686 | 2:10.971Patrick Utt | +9.715s (7.42%) |
Virginia International Raceway (3.27 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Runoffs 2023 | GT2 Race | GT2 | 02 | *Black/Blue/White Chevrolet Corvette | 6/15 | 1:54.668 | 1:52.865Jared Odrick | +1.803s (1.60%) | 156.111/15 | 164.0Tom Patton | -7.8 mph (-4.8%) |
Unknown track (3.27 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Runoffs 2023 | GT2 Qual 3 | GT2 | 02 | *Black/Blue/White Chevrolet Corvette | 8/15 | 1:54.411 | 1:52.004Barry Boes | +2.407s (2.15%) | 155.212/15 | 163.9Tom Patton | -8.7 mph (-5.3%) |
| Runoffs 2023 | GT2 Qual 2 | GT2 | 02 | *Black/Blue/White Chevrolet Corvette | 6/4 | 1:53.316Barry Boes | |||||
| Runoffs 2023 | GT2 Qual 1 | GT2 | 02 | *Black/Blue/White Chevrolet Corvette | 8/12 | 1:55.512 | 1:52.849Barry Boes | +2.663s (2.36%) | 155.27/12 | 163.2Tom Patton | -8.0 mph (-4.9%) |
| Runoffs 2023 | Run 2 GT1, GT2, GT3 Mon | GT2 | 02 | *Black/Blue/White Chevrolet Corvette | 11/12 | 1:57.406 | 1:53.036Barry Boes | +4.370s (3.87%) | 154.98/12 | 164.2Al Rowland | -9.3 mph (-5.7%) |
| Runoffs 2023 | Run 1 GT1, GT2, GT3 Mon | GT2 | 02 | *Black/Blue/White Chevrolet Corvette | 9/12 | 2:06.659 | 1:53.373Tony Ave | +13.286s (11.72%) | 153.77/12 | 161.0Tom Patton | -7.2 mph (-4.5%) |
| Runoffs 2023 | Run 3 AS, GT1, GT2, GT3, STU, T1, T2 Sun | GT2 | 02 | *Black/Blue/White Chevrolet Corvette | 4/8 | 1:58.348 | 1:54.246Barry Boes | +4.102s (3.59%) | 157.34/8 | 162.2Jared Odrick | -5.0 mph (-3.1%) |
| Runoffs 2023 | Run 2 AS, GT1, GT2, GT3, STU, T1, T2 Sun | GT2 | 02 | *Black/Blue/White Chevrolet Corvette | 6/9 | 2:00.906 | 1:55.074Barry Boes | +5.832s (5.07%) | 154.96/9 | 161.9Jared Odrick | -7.0 mph (-4.3%) |
| Runoffs 2023 | Run 1 AS, GT1, GT2, GT3, STU, T1, T2 Sun | GT2 | 02 | *Black/Blue/White Chevrolet Corvette | 7/8 | 2:08.289 | 1:55.095Barry Boes | +13.194s (11.46%) | 155.84/8 | 162.2Jared Odrick | -6.5 mph (-4.0%) |
Circuit of the Americas (3.41 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lone Star Grand Prix 2023 | Grp 7 GT1,2,X,AS,T1 Race 2 | GT2 | 22 | Chevrolet Corvette | 2/10 | 2:19.076 | 2:15.968Tony Ave | +3.108s (2.29%) | 151.13/9 | 156.4Simon Asselin | -5.3 mph (-3.4%) |
| Lone Star Grand Prix 2023 | Grp 7 GT1,2,X,AS,T1 Qual 2 | GT2 | 22 | Chevrolet Corvette | 2/6 | 2:19.279 | 2:16.599Barry Boes | +2.680s (1.96%) | 146.52/6 | 155.7Simon Asselin | -9.2 mph (-5.9%) |
| Lone Star Grand Prix 2023 | Grp 7 GT1,2,X,AS,T1 Race 1 | GT2 | 22 | Chevrolet Corvette | 3/11 | 2:18.584 | 2:13.599Tony Ave | +4.985s (3.73%) | 147.86/10 | 155.7Tony Ave | -7.9 mph (-5.1%) |
| Lone Star Grand Prix 2023 | Grp 7 GT1,2,X,AS,T1 Qual 1 | GT2 | 22 | Chevrolet Corvette | 3/11 | 2:18.492 | 2:14.972Tony Ave | +3.520s (2.61%) | 148.12/11 | 156.1Barry Boes | -7.9 mph (-5.1%) |
Letters to Fastrack
GT2 Appendix K Wet Tire Revision Request
#36454 from Michael Quattlebaum · No action required · Minutes (2024-10 Fastrack)
Thank you for your letter. A competition wet is currently legal with a 100 lb. weight penalty.
GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2
#35878 from Michael Quattlebaum · Rule change · TB 24-05 (2024-05 Fastrack)
In GT2-ST Spec Lines, Chevrolet Corvette (14-19), change Restrictor as follows:
"78 80mm flat plate"