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Gear ratio

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Old 03-04-2014, 04:44 PM
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J.R.
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Default Gear ratio

For all you Road Atlanta racers:

thoughts on diff ratio:
3.42
3.73
3.90

26.5 in rear tire
6500 rpm's max

MM6 trans
Old 03-04-2014, 06:34 PM
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Pumba
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With your 26.5 inch tire and a 6,500 rpm rev limit the following will be your speed in each of the six MN6 gears with a 3.90:1 final drive ratio:


1st - 49.4 mph


2nd - 73.8 mph


3rd - 101.1 mph


4th - 131.4 mph


5th - 177.5 mph


6th - Not useable.


Good luck with your decision.
Old 03-04-2014, 08:57 PM
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rmj951
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You getting ready for Nats?
Old 03-04-2014, 09:13 PM
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J.R.
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Originally Posted by rmj951
You getting ready for Nats?
Thinking about doing Road Atlanta and Sonoma.
Old 03-04-2014, 09:39 PM
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RX-Ben
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Haul me back with you to Sonoma.
Old 03-04-2014, 10:04 PM
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J.R.
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Originally Posted by RX-Ben
Haul me back with you to Sonoma.
I would have to somehow turn my trailer into a stacker.
Old 03-04-2014, 10:35 PM
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z06801
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Originally Posted by J.R.

I would have to somehow turn my trailer into a stacker.
Haul me to Atlanta, lets borrow JDPs that would fit 2. Actually we both could fit in Kyle's (GT-R) new stacker, I doubt he has 4 cars going.

Last edited by z06801; 03-04-2014 at 10:49 PM.
Old 03-05-2014, 12:43 AM
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I'm planning to make Road Atlanta. Looking at video over the weekend looks Vette friendly.
Old 03-05-2014, 01:14 AM
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sperkins
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Short of having a big cube motor and a ZR1 gearbox, the 3.42 gear is hard to beat. I run a 25.5" tire with a 6900rpm limiter and stock diff and I never have to use 5th.
I thought that I had this video posted with data, but I guess I don't.
Either way, you can get a feel for the combination by watching this version. You may be able to carry 3rd all the way down through the esses with the taller tire, but I haven't done the math on your 6500 limiter.

Old 03-05-2014, 10:04 AM
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Originally Posted by sperkins
Short of having a big cube motor and a ZR1 gearbox, the 3.42 gear is hard to beat. I run a 25.5" tire with a 6900rpm limiter and stock diff and I never have to use 5th.
I thought that I had this video posted with data, but I guess I don't.
Either way, you can get a feel for the combination by watching this version. You may be able to carry 3rd all the way down through the esses with the taller tire, but I haven't done the math on your 6500 limiter.

Thanks
Old 03-09-2014, 10:17 AM
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Nice driving.....

Originally Posted by sperkins
Short of having a big cube motor and a ZR1 gearbox, the 3.42 gear is hard to beat. I run a 25.5" tire with a 6900rpm limiter and stock diff and I never have to use 5th.
I thought that I had this video posted with data, but I guess I don't.
Either way, you can get a feel for the combination by watching this version. You may be able to carry 3rd all the way down through the esses with the taller tire, but I haven't done the math on your 6500 limiter.

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