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Old 08-26-2009, 11:46 AM   #4
everlast
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Join Date: Mar 2004
Location: Ottawa
Posts: 5,847
I've been using this one:

http://ctny.audiworld.com/mark/s4/gears/gear_calc.html

I calc that in fifth you should be turning 2760 RPM at 100kph with a 2.93. With a 3.73 it would be 3500 RPM (ouch).


(BTW, those are quite undersized tires. E30 should be around 24". )
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