Quote:
Originally Posted by GeorgeSmooth
I remember you mentioning that with the shorter ratio you could not get the traction down. I had the same problems with the M3 diff but what I did is a tuned in a far less aggressive boost map, stepping it up very gradually and it seems to have done the trick in terms of traction.
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I'm impressed you remember my comment so long ago...
Well, the prespective of using an /M diff in a non-M car is really interesting but using a shorter final drive ratio is mistaken (in my opinion ,of course).
There is no need to use a shorter final drive when you have a car that performs the +50% of its maximum torque from 1200revs ,like 335i.
A shorter diff would be ideal for the naturaly aspirated //M cars that needs to reach their beneficial rev range fast (which is pretty high at 5500revs+).
Again, I find impressive your whole experiment from a technical view, but in your place i would roll back to your quaife one
