VHR + FD Gear Ratio upgrades - 3.9 and 4.08

wstar

You? I'm starting to really think about just moving mine up to the 6MT's rear end (3.692 instead of 3.357 that came with my 7AT). I need to go run the numbers again and think about high-speed RPMs more though (that, and wait for a programmer like UpRev that can tell the ECU about it too).

Edit:

7th gear on a stock 7AT setup with stock Sport wheels/tires is approximately 32.78 revs/mph. Swapping in the 6MT's rear end would put it at about 36.04 revs/mph. This is what the revs would look like with the two options, cruising in 7th on a very long track:

mph | rpm | rpm
100 | 3278 | 3604
110 | 3606 | 3964
120 | 3934 | 4325
130 | 4261 | 4685
140 | 4589 | 5046
150 | 4917 | 5406

In the lower 100's it's not too bad a difference. Even at 150mph it's only 500rpm. Hmmmm....

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