Infineon Raceway - NASCAR Circuit V1 (Buick Regal GNX)

Tire Pressure -
Front: 19.0 PSI
Rear: 19.0 PSI

Gearing -
Final: 3.68
1st: 2.60
2nd: 1.59
3rd: 1.22
4th: 0.96

Alignment -
Camber -
Front: -1.0
Rear: -0.8
Toe -
Front: -0.1
Rear: 0.2
Caster: 3.0

Anti-Roll Bars -
Front: 40.00
Rear: 11.10

Springs -
Front: 600.0 LB/IN
Rear: 300.0 LB/IN
Ride Height -
Front: 6.8 IN
Rear: 7.4 IN

Damping -
Rebound -
Front: 7.0
Rear: 7.0
Bump: 4.0
Rear: 4.0

Aero -
Front: 67 LBS
Rear: 160 LBS

Braking -
Balance: 72%
Pressure: 95%

Differential -
Acceleration: 58%
Deceleration: 58%

---

I am following the turn numbers indicated by that of the course map shown on wikipedia, so have a tab open to that to better keep up with what turns I'm referencing.

Sonoma hosts a difficult racetrack for this car. You will need to run a good line in order to just keep on the track, especially in the esses. Your passing opportunities are pretty limited to the hairpins, or coming up to Turn 3 (a left hand corner followed by a cresting blind right hand corner). You can also outbrake an opponent going into Turn 4, but if you're trying to race without going onto the wide concrete patch on exit (which is uncertified zone), you might just hold off until the Turn 7 hairpin.

Turn 8a is tricky and if you aren't going at a proper speed, you might find yourself off track and into a stick grass patch that forces you to run only 20MPH. If you know you won't make the turn, just run the Indy Car extension. It's better to bite the bullet with that low speed chicane instead of spending easily twice as long trying to get out of the sticky grass patch. Just make sure you're clear before returning to the main track before you exit that chicane since you'll come right onto the racing line of Turn 9 exiting the chicane.

Turn 11 should be run pretty slow until the midpoint and then you'll be accelerating from then on until Turn 1. Oddly the AI racers of FM4 will slow down for Turn 12 even though a proper line with just about any car will allow for full throttle through it.

No video lap this time, so later I will update this post with a more detailed lap description that hopefully will not be as confusing as the Sedona Speedway lap walkthrough.