Hello all, my DKZ engined S1 205 GTi 4 speed auto is running like a dream, the gearing though is a little tall, 100kph at 2600 rpm. Is it possible to install a CWP from a BE-3 box, which would give me around 100kph at 3000 rpm shortening my gears and adding a tad more pep. Or do I need to find a diff from another model ZF trans for compatable components.
I found an AA car review with some 205 auto box ratios.
36 kph @ 1000 rpm in 4th top gear
100 kph = 2800 rpm
ZF Auto diff 3.820 is 36.0 km/h/1000rpm = 108 kph @ 3000 rpm : from AA review a 205 w/13" wheels
S1 GTi diff 3.940 is 30.9 km/h/1000rpm = 92.7 kph @ 3000 rpm
S3 GTi diff 3.620 is 33.7 km/h/1000rpm = 101.1 kph @ 3000 rpm : this would be my ideal ratio.
Mi16 diff 4.430 is 31.4 km/h/1000rpm = 94.2 kph @ 3000 rpm
My current speed and rpm readings = 115 kph @ 3000 rpm : 14" pepper pots w/ 185/60/14
The S1, S3 and Mi16 diff & ratio information I copied from an earlier post from Peter T. thank you Peter for the valuable info you post on this site. And I apologize if my dislexia has misread any of your calcs.