Something doesn't feel right, the car tends to oversteer more than it should (in my opinion) given the setup I'm currently running. The front is very very planted; however the rear feels light. My main issue is with mid turn oversteer.

255/40/17 on 17x9 +45 Star Spec all around. 38 psi hot
Gendron 1-5/16" FSB on full stiff
AP2 rear swaybar
Tein SRC (Front 4 com/4 rebound, Rear 4 comp/6 reb)
Kaaz 1.5 LSD
APR GTC-300 (currently at 5 deg AOA)
Camber -3.5F/-3.0R. Toe: 0 front, 0.25" total rear

The only thing I can think of is corner-balance. I had initially corner balanced the car when I had the same setup but with 17x8 225/40 up the front. Since then, I changed the front wheels to 17x9 with 255s. The overall diameter is almost the same as before, maybe 2 mm smaller. I can argue that the weight may be a little more front biased now.

I'm thinking of going back to check my corner weights and perhaps set the rear to -3.5 camber as well. I tried tinkering with tire pressure & adjusting the clickers; however the rear never feels planted. The car does seem to like -6 rebound front and -4 rebound rear.

Any thoughts?

thanks!
Arax

 

Dial in some more rear wing.

 

less rear rebound too

 

Are you auto crossing or road racing the car. I am assuming autox because the Gendron is about 925 lbs/in if you are running the solid bar on full stiff. That would be way too stiff for road racing.


Check the ride height difference front to rear

I thought the largest Gendron bar was 1.25".

Is yours hollow or solid?

Have you talked to Bill at Gendron about your setup?

 

I am road racing. The only reason it's set on full stiff is because I'm trying to counter the oversteer (which helped significantly).

The Gendron bar is a custom piece. He makes sizes larger than 1.25" by request. Mine is a hollow bar.

As for ride height, it looks visually equal. I guess I can go measure to see the difference. Also, since the car has been corner balanced, doesn't that infer that ride height is OK?

 

-3.0° rear camber.
Surprised that hasn't been questioned.

 

I'm really surprised your car is oversteering. Shouldn't with that setup, you sure its not the cockpit spacer?

 

Ditto. Have you checked for mechanical issues? Front sway bar endlink broken? One of your rear shocks shot? Cord a rear tire? Tweak your alignment hitting curbs?

 

I`d go for -3,0º front / -3,5º rear camber, but this is just an educated guess. Good luck.

 

On or off throttle? Part throttle or full throttle?

-Rob