Went to get car aligned today and do some finishing touches. Went to a very reputable BMW race shop, but 0 knowledge about s2k's. Was planning to use Robrob's base aggressive track specs but they thought as an intermediate track driver I won't be able to drive the car at 10/10ths and wouldn't be able to take advantage of this type of setup. So they were thinking -2.5 rear and maybe .12 rear toe.

Thoughts?

 

From my readings, and i am certainly not a pro, but .25 total rear toe is ideal with the geometry of the AP1 rear suspension.

I run -2.5 or 2.8 camber in the front and -3 in the rear. However i do not really have a real suspension on my car.

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Here's what I don't understand. I thought toe will help with turn in. Doesn't an AP1 already have perhaps too much turn in for an intermediate driver where you maybe want to decrease it a bit?

 

By the way planning to do 3.5 front camber.

 

More rear toe in keeps the rear in line

More front toe out helps the car turn in.

 

More neg rear camber can help rear peak cornering grip (if springs are soft), but compromise straight line rear grip and mild, partial loaded rear turning grip.

Alignment is highly dependent on spring and sway rate.
That being said, if an intermediate I might do -2.5 rear camber and 0.2 rear toe in if you're on stock Torsen.

 

Spring rates are 700 front and 585 rear on Ohlins dfv's with big 30mm solid front sway bar.

 

On my all stock 01 I use -1.8 camber front with 0 toe, and -2.7 camber rear and .2 rear total toe. Using Z'2s. Seems to work well for me until I'm ready to step up to wheels suspension. IMO gives the car more cornering control to help prevent oversteer, and makes the rear more predictable/manageable/saveable when we it starts to slide.

 

Correct me if I'm wron hear but it's all about how much you compress the shocks in a turn. Especially if I'm on a stronger shock spring rate I'd have to push very hard for car to compress shocks enough that tire becomes flat in the turn.

 

What tires?