Porsche Enthusiasts Club Forum

How about trying a wheel/tyre combo with a smaller rolling radius? Easier than swapping out the transaxle and easy to change from one to another.

That is exactly what I used to do when I Sprinted my TR5 at Goodwood and Gurston a while back.
Standard tyres were 160 80! 15 and to compete I fitted (on a set of seperate rims) 195 60 15 and it was worth 3 sec at Goodwood where the car would do a standing start 1 min 49 sec and pull out of the corners much better.
It also lowers the car which helps too.

Iam rolling on 16inch teledials with a smaller overall diameter tyre 205/45 on the front and 225/45 rears which has helped.
in sprinting and hill climbing any slight improvment is welcome to get seconds off
i take it 86 turbo early offset car cant run 15 inch wheels.......due to brembos

maybe we should start another thread. Ooops accidently hijacked this one.

Has anyone ( is it possible to )put an S box in an s2 to lower the final drive ratio?