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Automagic M3 Had A 3.38 Differential... (archive)
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Posted by dpeete on April 16, 2001 at 13:21:38:

In Reply to: Re: 2001 M Coupe Gearing (too long, sorry) posted by Ron Stygar on April 15, 2001 at 23:37:45:

I think Dinan pulled these gears for use in their ISR3.

With 255/40/17's the car would turn 3636RPMS at 75mph and assuming a 8100RPM redline would do 67 in second gear.

A 3.38 would offer 7.3% more torque to the wheels versus a 3.15 or 4.6% over a 3.23. If it is a 3.15 stock, the change might be worth it... it would make the 251ft-lbs work like 270ft-lbs.

Doug

If it comes with the 3.15, someone has already asked me to change it to the 3.23. Not sure what else is available yet.




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