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Thunderhill East SpeedSF - Labor Day Weekend 2025 - BMW M340i
chrispy
Location:
United States
Level:
Amateur
chrispy
Lap Date : 02 Sep, 2025
2min 1.707sec (-2.92s)
Thunderhill (East 3 Mile w/ Bypass)
BMW M340i xDrive 2021 (chrispy/CRS)
Medium
Tire: 200 CR-S (CR-1)
Front Pad: CSG C21
Rear Pad : CSG C11
Tire Size: FRONT: 225/45/18, REAR: 255/40/18
Published on 21 Sep, 2025

Tires: CRS
Weather: Hot AF

Setup changes:
- TC Design roll bar, 6pt harnesses, new seat setup
- Slightly stiffer front springs
- Replaced Vorshlag with GC plates
- New inner tie rods (confirmed cause of clunks)
- Coolant flush (70/30 mix with water wetter)
- More aggressive alignment (-4/-2.4) and corner balance

Big shakedown weekend of the half cage and a bunch of other stuff. Being harnessed down is very nice. I'm able to focus better on my inputs under braking. I don't think I'll want to seriously track a car without harnesses ever again. The new seat is also more aggressive which is a bonus. Only downside(?) of the new setup is I can't tilt my head down very easily to look at the catalyst.

Aside from the awful weather, the front suspension is making really loud noises. Tony confirmed that the springs are the issue with a quick diag in the paddock. I'm guessing it's the helper springs, and Joe thinks the noises are coming from the helpers as well. Gonna have to take the car back to shop before Sonoma in a few weeks.

Not much seat time for me since I didn't want to absolutely ruin fresh CRS in this heat. I still managed to put down a 2min lap which is cool I guess. Driving was sort of sloppy this weekend, but I still had a good time. Nice to hang out with the track fam after a long break.

2:19 why slow down this much?
5:25 not sketch at all
11:39 wtf am I doing bro
15:32 grrr
16:02 ????
17:32 this isn't the first nor the last time I dip a wheel on entry
30:48 cup car took away my lap :(
32:00 I swear I didn't curse him
33:55 fastest lap of the weekend (2'00.5)
36:32 look at Joey's ridiculous aero
41:30 I really need to fix my T10 braking
42:30 Joey stop being late 😡
47:33 so close to a triple digit T8
48:12 I'm tired of being chased by Andrie

0:00 Sunday session 2 (data got messed up somehow)
12:24 Sunday session 3
23:04 Sunday session 4 (data isn't synced well)
33:53 Monday session 1
42:21 Monday session 2

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