Hi
I bought some 6x15 Cookie cutter and had new tyres fitted, 205/50x15 Mickey Thompsons and 195/55x15 Goodyears.
Running at VW only drag meet in a few weeks time, I have been running 245/40x18 Mickeys at the drags and the Snowy Moutains 1000.
The 18s had a diameter of 651mm, the 15s have a diameter of 588mm so these should help with acceleration.
1st gear @ 8000rpm will now do 73 instead of 82 kph
2nd gear @ 8000rpm will now do 125 instead of 139 kph
3rd gear @ 8000rpm will now do 182 instead of 197 kph
4th gear @ 8000rpm will now do 239 instead of 258 kph
5th gear @ 8000rpm will now do 299 instead of 323 kph, all theoretical of course
Steve