RCR gt 40 track test & chassis setup (results)

[Naumoff]

Originally Posted by dlampe

Tony, your wheel rate are set up great for the road. For the track they need to be at least 275 and a little closer to 300 is better. You will be fine. The cool thing is at least your know. I have a lot of springs. Do you know what size you are running?

496fe, To fix the body roll the correct way would be to bump up the springs but that will mess up my balance as I have it set. I can raise the swaybar rate front and rear with the most gain in the rear and get pretty close. That is what I am going to try first. The car is already very close. When I get to the track I can test my tire temps and that will tell the whole story.

Gary, I plan on running in Tulsa next year for sure.

Buzz, glad to hear things are going better.

Dean,
I am running 550# springs up front but have a set of 650# that will bring it up to 284# wheel weight.

But I don't have another set of springs for the rear. I am running a Jag rear with quad coil overs.
I assume that you add the two spring rates for each side which on the calculator it gives me 230# wheel weight.

The spring rate is 300# per spring.

It is easy to change the springs on my car. I think the R&G will help me
move in the right direction for setting up my cars suspension.

[speed220mph]

diampe: Don't judge too quickly on whether you need larger tires up front. I had some old 225F/295R 15s T/As on my ERA GT40. I switched to 205s at the front because that's all Avon ralleys came in unless I went to a much taller tire. On recommendation from Dennis Olthoff--Superformance--I elected to stay with the shorter, narrower tire, but was able to keep the 295s at the rear. The car was neutral with the old hard tires and remained so with the Avons albeit smaller fronts. I was able to pull much high g in the corners while remaining neutral with the Avons. Even was able to hang out the rear end by adding power coming out corners.

To loosen up your car, try a bigger rear bar. I like the sliding block setup to adjust bar stiffness. I've made several of these for race setups because they are great for making small adjustments.