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Old 06-01-2009, 02:35 PM   #10
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Xanthos's Avatar
Drives: Formerly-Stick
Join Date: Mar 2008
Location: Oklahoma
Posts: 12,588
Originally Posted by MadMaxx View Post
Stock cruise @ 75mph is right on the 2Krpm mark in my car.

Just for reference:

27.5" tires with 0.67 6th gear, 4.10 static gear ratio = ~2500rpm @ 75mph. Not a huge leap over stock.
I'd be more worried about how rediculous first gear would become. Its already a total 14.64:1. Swapping in 4.1s will put that at 18.37:1. Seems just a bit too steep to me - you'd be shifting about 2 miliseconds after launch. It seems to me that the V6 is already geared pretty well. The most I would want to do is swap in an SS rear. That way you get the beefier rear end and the 3.45 gears instead of the 3.27. That would put your first gear at 15.46:1, give you a bit more pull throughout the entire strip, and help you handle the extra power if you decided to go FI or similar.
- Xanthos

2017 1LT/RS A8 Hyper Blue Metallic

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