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Need opinion on ratio choice

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Old 04-13-2008, 09:34 PM
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Default Need opinion on ratio choice

Car is 6 speed, shift at 6400 rpms, will have nitto 315 35 17's, see sig for mods / hp.

9" that currently has 3.70's and i'm thinking this is too much for 1/4 mile. I don't want to shift into 5th gear.

Someone's gotta have the same setup and can give me input...

Thanks
Old 04-13-2008, 10:09 PM
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Originally Posted by firehawk618
Car is 6 speed, shift at 6400 rpms, will have nitto 315 35 17's, see sig for mods / hp.

9" that currently has 3.70's and i'm thinking this is too much for 1/4 mile. I don't want to shift into 5th gear.

Someone's gotta have the same setup and can give me input...

Thanks
What do you trap in the quarter, about 140?

A 3.45 or 3.50 ratio should probably work.
Old 04-13-2008, 11:10 PM
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Never ran it

Plan on getting kicked off soon after running it though.

Need to look into cages.
Old 04-14-2008, 09:28 AM
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It'll obviously depend on what you trap in the 1/4, but here is what your mph would be in 4th gear at 6400rpm with the following gears:

4.10 = 119mph
3.90 = 125mph
3.70 = 132mph
3.50 = 140mph
3.40 = 144mph
Old 04-14-2008, 11:59 AM
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My freind has an F1 blower. He uses tall slicks at the track. He has a 3.70. he is 15x MPH.




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