Trail Braking and Rotation Questions

[Chillracing]

Originally Posted by Dezoris

Here is the update with new alignment. I was only able to run morning session and still managed second in class out of 10.

The car is better, but I am still not getting the rotation I want and, for autox I am starting to hate the AP brakes at these events but regardless thanks for tips. With some minor adjustments in driving I should be able to run consistently in top 10 overall and 1-3 in class for sure. Need to get somethings sorted then try some national events.

The car does seem like it's pushing some but a bit of that is caused by you. There's times where you're on the throttle and understeering and other times like the last corner that you're using way to much wheel and causing the understeer. You have to coordinate your hands and feet better and make the front end work for you. Right now you're entering corners without getting the weight to transfer to the front and creating understeer. Sometimes it's faster to dab the brake or lift abruptly and get the weight to shift than to try to power through the understeer. Watching the replay though I think even if you do that right your car will understeer. It just seems to have no front grip in those conditions. I'd try something drastic in one area at a time till you saw some sort of change. If trying camber didn't do it then try a sway bar either stiffer or softer but not a small amount and see if it changes anything. If your car is that far out of the ballpark sometimes it takes big changes to get close to the window that the car works in.

[Dezoris]

Originally Posted by CSG Mike

@Dezoris: Do you have data with wheel speed sensors and an accelerometer? I may be able to figure out a cause and possible solutions.

From aim?

[dp1]

Originally Posted by kster1

I'm also on Ohlins with the standard spring rate and here my thoughts.

With the rest of the suspension stock, I installed the Ohins and went out to a track event. I felt the car was pushing way too much (the camber was something like -2.4F/-1.8R) and this was confirmed with a pyrometer. The front tires were working a lot harder than the rears. I'm sure my driving style plays a factor here but I much prefer the loose feeling of say the S2000 rather than this understeer.

At a temporary fix, I'm now running a rear sway bar from a ~2008 WRX and this helps rotation quite a bit. But my plan is to go back to the OEM rear sway bar and instead swap out the springs to something around 350F/425R (lbs/in).

I'm on Ohlins with standard spring rate but with previous setup was at close to 20mm drop from Ohlins specs and -3.4f/-2.7r camber on 235/40-17 toyo proxes ra1. This camber setup was recommended by @CSG Mike and worked very well on two tracks, with mild oversteer. I have a new car now with Ohlins set to their spec height with -3.0f/-2.5r camber and 1/16 toe in for rear. Will try it out at WGI in early July. Camber made a lot of difference.

[CSG Mike]

Originally Posted by Dezoris

From aim?

aim/torque/app of your choice