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View Full Version : Rear diff recomendation. hnoppenberger 06-10-2005, 12:37 AM so lets say u wanted to make the m better at 1/4 mile acceleration, and wouldnt mind a top gear speed of 140-150 mph. what rear end ratio would u go for, and whats accually in there stock? diffs online a good spot to get one? lemmy know thanks guys. Gop-Dogg 06-10-2005, 01:18 AM a few people have done a 3.91 upgrade. Diffs Online and Koala Motorsports are two reputable places to get custom ratio diffs. Kevlar 06-10-2005, 08:46 AM Somebody did calculations a while back for the stock 3.64, 3.91 and 4.10. They found that 1/4 times were not improved that much. However, when you're in gear... the power put down was much better, you just had to deal with a higher RPM in every gear. truth 06-10-2005, 02:05 PM OEM http://kinetechnik.com/drivetrain/e46m3/speed4.gif 3.91 http://kinetechnik.com/drivetrain/e46m3/speed5.gif 4.10 http://kinetechnik.com/drivetrain/e46m3/speed6.gif |