VHR + FD Gear Ratio upgrades - 3.9 and 4.08

Originally Posted by KLRCADI It would not be anywher near that high. I used a gear calculator, and with a 4.08 @ 70mph in 6th would = 3000 rpm. Great,

		Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain
VHR + FD Gear Ratio upgrades - 3.9 and 4.08

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04-19-2009, 07:33 PM

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wstar

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Quote:

Originally Posted by KLRCADI

It would not be anywher near that high. I used a gear calculator, and with a 4.08 @ 70mph in 6th would = 3000 rpm.

Great, so I'll be at 3K when a cop is following me

With the stock 7AT setup, for example 4K rpm in 7th is only 122 (according to your gear calculator page, but it sounds about right). Moving to a 4.08 puts us at 5K rpm in 7th to reach the same speed. I might consider just swapping into the manual's 3.692 gearing though (once we have a programmer so I can tell the ECU about it).

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