T4 BMW Z4 Weight Reduction Request
#40287 from Gino Carini · Not recommended · Minutes (2026-08 Fastrack)
We will continue to monitor the car in the class. We have been watching this spec line since the dawn of the class.
BoP Lab / Drivers / Gino Carini
Gino Carini 1 letter to Fastrack
Against the front of the class, by track and class
| Track | Class | Sessions | Typical gap to class best | Closest |
|---|---|---|---|---|
| Road America (4.01 mi) | T4 | 4 | +2.716s (1.71%) | +2.232s (1.40%) |
| Unknown track (4.05 mi) | STU | 4 | +11.844s (7.60%) | +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.
Road America (4.01 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| June Sprints 2025 | Grp 6 STL STU GT3U T3 T4 Race 1 | T4 | 127 | BMW Z4/E89/2.5L | 4/6 | 2:41.382 | 2:39.150Ethan Barker | +2.232s (1.40%) | 125.91/6 | 125.9you | +0.0 mph (0.0%) |
| June Sprints 2024 | Grp 9 T2 T3 T4 Race 2 | T4 | 27 | BMW Z4 | 6/9 | 2:41.653 | 2:38.937Marc Cefalo | +2.716s (1.71%) | 121.85/9 | 123.7Christian Braunlich | -1.8 mph (-1.5%) |
| June Sprints 2024 | Grp 9 T2 T3 T4 Race 1 | T4 | 27 | BMW Z4 | 7/10 | 3:04.698 | 2:54.716Scotty B White | +9.982s (5.71%) | 108.710/10 | 122.2Paolo Salvatore | -13.5 mph (-11.0%) |
| June Sprints 2024 | Grp 9 T2 T3 T4 Qual | T4 | 27 | BMW Z4 | 8/8 | 5:23.310 | 4:08.033Marc Cefalo | +75.277s (30.35%) | 73.18/8 | 113.4Scotty B White | -40.3 mph (-35.6%) |
Unknown track (4.05 mi)
| Event | Session | Class | # | Car | Pos | Best lap | Class best | To class best | Trap | Class trap | To class trap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| June Sprints 2016 | Gr 6 T2,T3, T4, STL, STU, BSpe Race2 | STU | 55 | Milw | 2/2 | 2:52.905 | 2:35.284Richard Fisher | +17.621s (11.35%) | |||
| June Sprints 2016 | Gr 6 T2,T3, T4, STL, STU, BSpe Race1 | STU | 55 | Milw | 2/2 | 2:47.656 | 2:35.812Richard Fisher | +11.844s (7.60%) | |||
| June Sprints 2016 | Gr 6 T2,T3, T4, STL, STU, BSpe Qual2 | STU | 55 | Milw | 3/2 | 2:32.099Joe Moser | |||||
| June Sprints 2016 | Gr 6 T2,T3, T4, STL, STU, BSpe Qual1 | STU | 55 | Milw | 3/3 | 2:20.898 | 2:20.898you | +0.000s (0.00%) |