c32b

Was recommended to have height around F 12.8" and R 12.6" but thats with about 900lb springs

Carbon Blue

wow that looks great mac, the car looks very easy to handle and correct on those high speed sweepers. Do you ever heel toe/rev match? Dont you have problems locking the rear end up at those speeds just putting it into gear like that? How does she ride on the street with that spring setup that you have? Im thinking about sending out the bilsteins for a revalve but feel that a spring setup like that might be a little too much for my stock sized ap1's tires.

c32b

Btw, what other changes were made? Just wondering if it would have offset any ride height changes

Also wondering what was your feel that made you consider to further lower your car from this height.

macr88

Try it and see how you like it, I ran with the rear lower for a little while and liked it.

macr88

Thanks, I never heel toe downshifts and as long I'm not retarded with the clutch it works. You can also help corner entry on the slower turns with this, my adjustable brake bias.
The spring rate really isn't that bad and it's fairly comfy, maybe shoot for something around the 500 range, a 100 pound split will give you good ride and a 50 pound split will porpoise a tiny bit and same rate will porpoise quite a bit.

macr88

Lower cg is always better as long as you don't have any funky suspension quirks that prevent you from going low.

If you're making changes on the fly you'll be changing camber and toe. Or we're you asking me what other changes I made? I didn't make any other changes but I have done it at the track before so I did gain a bit of camber and a bit of toe.

dan_uk

A lot of time trial guys run 700/650lbs springs with the rake of the car about level.

I run 700/600lbs and usualy the car is a bit more raked like 1/2 higher at the rear since I didn't have enough shock travel to go low and the rear shocks would bottom out

Having more ride height on the rear I think puts more weight on the front which makes the car a bit pointier.
I never heard of anyone running the car lower at the rear than the front. I would be careful you don't set it so low you bottom out the rear shocks.

This is what it handles like when you bottom the rears the suspension loads up then snap oversteers:

http://vimeo.com/29325245

c32b

Thanks Dan.

Tein manual recommended it although I have a fairly high spring rate. Will have to trail & error I guess

Croc

my understanding of the theory is that the side you lower gets more grip.

so - lower front end means more front greap (and less rear grip)
lower rear end - less overstear and more understear.