making the car turn!!

[puma]

ok so let's try this again, here is the complete alignment setting after a call to the driver


Stock swaybars front and back, all 4 corners at 400lbs, rear is slightly higher than the front


front, 3,1 deg of camber, around 6 deg of caster and 2mm toe out on each side from front to back on a 17" Wheel


rear wheel is 2 deg camber and last time was 2mm toe in on each side, i beleive we were at 0 toe before and wasn't much better.


can't remember about shocks settings but i know they are soft since driver said the car didn't want to sit on the tire, seemed like the suspension was too stiff for the tires.


turns he has problem with are in third gear at low speed (hairpin) says he can't apply throttle early as car always understeer towards the exit

[Racecomp Engineering]

The shock settings are important. Give Myles in the office here a call or send us a PM and we can help there. Reducing front rebound is my off hand recommendation but it would be good to know where you are starting from.

Putting your rear 500s on and leaving the fronts at 400 is an idea, but I wouldn't go there just yet. Also with those crappy tires I'm afraid it would be too stiff especially for an actual race (as opposed to a time attack or HPDE).

EDIT: From looking at the pictures in your other thread, I would definitely add some front negative camber and reduce front rebound.

- Andy

[puma]

well all those suggestions are giving me pointers, we are going to try a couple of those on our next practice, thanks everyone.

[swarb]

Are those two other cars you can't keep up with on the same cheap tires? Tires are probably the most important thing.

[puma]

yes everyone in the serie is on the same tire

[Racecomp Engineering]

Originally Posted by puma

well all those suggestions are giving me pointers, we are going to try a couple of those on our next practice, thanks everyone.

Keep us posted.

- Andy

[solort]

I do think more toe out in the rear will help. 2mm is almost zero. I have run as much as 1/4 in total toe out in the rear of another car to get it to rotate. But stiffening the rear spring rates, rear shock rebound or stiffer rear bar also helps rotation (or soften front)

[strat61caster]

+1 on putting the 500# on the rear from an armchair quarterback, I seem to remember CSG (or maybe Racecomp) claiming that 20-25% stiffer rear spring is going to give a balanced dynamic which leads me to assume that an even spring rate Front/Rear would result in a softer rear (read: more planted rear) than front inducing some understeer, I'm drawing a blank on the specific post but here's what some quick googling came up with.

Here is CSG's Tein kit:
http://www.ft86club.com/forums/showthread.php?t=82796

And here's a discussion on the idea but it didn't seem to get very far:
http://www.ft86club.com/forums/showthread.php?t=56678

Rear toe out will definitely help rotation, looks like it's a track only car so definitely try it. Zero toe in the rear was rather darty and unstable feeling on the freeway to me so I've got some toe-in for DD purposes, I may be reducing it in the future...

[Sleepless]

My vote is driver training with this platform. I find understeering at corner entry into a hairpin is always my error, usually not enought trailbraking. Otherwise, what brake pads are you running front/rear?

[puma]

we are currently running DTC60 but entry isn't the problem he says it is on exit that the car understeer, he has to wait too long to apply the throttle.

[wparsons]

Is the corner slow enough he can drop to 2nd and use the extra torque to rotate the car on exit?

If not, I'd try a bit less rear camber or stiffer rear spring rates. In the other thread there's a shot of it lifting the inside front tire on exit, that can't be helping front grip.

[GSpeed]

Sorry if you've already addressed this, but how do your cross weights look? I didn't see any mention of them, or pictures of scales anywhere.

[Jack Black]

Originally Posted by Racecomp Engineering

BTW if the driver is coming from a fast FWD racecar that I assume is extremely loose on entry (as those platforms should be), then there may be some driver adjustment as he adapts to a different RWD platform. It sounds like your results are still very good so I wouldn't get too drastic with changes.

- Andy

This was my first thought as well. Probably needs to use more trailbraking, especially coming from a FWD, which is typically set up so that you don't use much trailbraking.

[puma]

Originally Posted by PST

Sorry if you've already addressed this, but how do your cross weights look? I didn't see any mention of them, or pictures of scales anywhere.

i thought i took a picture of it but it seems like it is before the supercharger install, i'll try to take one after the next race.