[NoHachi]

I think Axle kinematics are a bit beyond the scope of normal enthusiasts. Its difficult enough to get any existing setup to work based on those books. Figuring out how everything will react when you graft it onto a different chassis is close to designing a car from scratch unless you keep every (and I mean every) pickup point in exact relation to the others and the steering setup. This will not happen on the S-body swap.

The thing I'm having a hard time with is imagining why you would use S13-S15 stuff? McPherson front setup that chews through tires, outdated multilink rear that needs all kinds of improvements to "work" and be adjustable (and like most AE86 stuff, the S13 mods are very poorly executed, read Beans books to know more). Also nearly all the available shock options are shit for road racing.

There are just so many better starting points that have better geometry and are totally adjustable out of the box. Stuff like the Elise, MX5, the later S2k's with the rear toesteer fix, RX8. Etc etc. You could even try and adapt some Locost wishbones to a custom built subframe.

If I were to do this I would be looking at dropping an AE86 chassis over one of these: http://www.pixelthis.co.nz/envy/images/u...x5_ppf.jpg