jela

SPOON SPORTS S2000
the S could be dangerous if you don't know your car

GiffS2K

So can we retrofit the AP2 rear end?

dammitjim

clag

With a dedicated AP1 track car I imagine you could dial in a healthy measure of toe-in, then even with decompression of the rear under braking/throttle-lift you would not be faced with a truckload of toe-out. This would cause a lot of straight-line scrub, impacting acceleration, as well as eating away at the rear tires on a daily driver which makes it a bit impractical for those who track rarely.

Also, if part swapping is in your budget, as CKit suggested:
Neither will prevent the toe change, perhaps make it less dramatic. Just thoughts.

ZDan

Going to stiffer springs/dampers will reduce the toe change inasmuch as it reduces suspension travel. I dunno exactly what the rear toe curve is, but if you increased spring and damping rates by 50%, the range of toe change under a given set of driving conditions should be reduced by about 1/3.

Even with the stock suspension, once you get used to the sort of nonlinear handling of the car (initial oversteer followed by neutrality), it's not so bad, really.

ZDan

I think the difference is in the location of the rear toe arm inner pivot. I.e., you'd have to swap in an AP2 rear subframe. Or you could try to relocate the pivot in the AP1's chassis. Honestly, I think seat time at the limit (autox or HPDE) is much better investment.

There are "bump-steer" kits for the AP1 that replace the toe arms, but some of these have suffered failures in use. I'm a big fan of keeping primary structural components OEM...

bronxbomber252

I run a lot of toe in (1/4in) due to doing a lot of autox on my 01... It is also my daily driver and Although I will say I probably have quicker tire wear my tires never got screwed up in any way. with 1/4in toe in and -2.5deg camber in the rear, no toe in the front and -1.6deg camber front I have perfectly even tire wear after 1 or 2 autox's a month and 1000-1500 (sometimes more) street miles a month.

ZDan

[QUOTE=clag,Jan 19 2010, 12:26 AM]With a dedicated AP1 track car I imagine you could dial in a healthy measure of toe-in, then even with decompression of the rear under braking/throttle-lift you would not be faced with a truckload of toe-out.

clag

[QUOTE=ZDan,Jan 19 2010, 05:24 AM]IMO the drawbacks outweigh the benefits.

CKit

[QUOTE=ZDan,Jan 19 2010, 05:24 AM] Forward weight transfer under lift is going to be exactly the same under a given rate of deceleration, regardless of what spring and damping rates are.