Rear end gear inputs

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Jul 25, 2013 | 10:26 AM

domestic disturbance

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From: paducah, ky

Rear end gear inputs

Guy I was running a 6spd with 28" tall tire and 4.56 gear.... Swapping over to a turbo 400 and wondering if I may need to re gear the car....

All Im really concerned about is running the best 1/8 mile time I can get, I do occasionally street drive the car....

Car basic details...

370 with F1 Blower, makes roughly 800whp

Thanks alot for inputs

Jul 25, 2013 | 11:55 AM

RENE'S RAGE

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From: Memphis, TN

I'd leave the 4.56's in it.
And see what it does.

Jul 25, 2013 | 12:52 PM

domestic disturbance

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From: paducah, ky

Quote:

Originally Posted by RENE'S RAGE

I'd leave the 4.56's in it.
And see what it does.

I was kind of thinking it would be to much and lock the converter up way to soon....

Jul 25, 2013 | 02:19 PM

ty_ty13

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From: paducah, ky

you already have it... run it and see... that 4.56 and 1st gear in the tranny would be my concern... i hope you have a way to control boost and or timing.

Jul 25, 2013 | 04:31 PM

93camaro_zzz

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I mean technically you shouldn't trap over 125 in the 1/8th, so you should be ok with 4.56's by the numbers, but when it comes down to it, I think it would be next to impossible to actually plant the tire in 1st gear with that much gear. I think in actuality, the car would probably be faster with a 3.25-3.50 gear.

Jul 26, 2013 | 07:15 AM

Mystery Bird

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Quote:

Originally Posted by domestic disturbance

I was kind of thinking it would be to much and lock the converter up way to soon....

Lock converter with a TH400?

Jul 26, 2013 | 08:19 AM

RENE'S RAGE

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From: Memphis, TN

Quote:

Originally Posted by Mystery Bird

Lock converter with a TH400?

Yeah, I'm alittle lost on that one.
He must be meaning something else.

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Jul 26, 2013 | 11:10 AM

93camaro_zzz

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From: San Diego, Ca.

The converter is always slipping, it is part of how it actually functions, but I think you mean where the converter is past it's stall point and doesn't slip as much.

Jul 26, 2013 | 12:29 PM

#10

RENE'S RAGE

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From: Memphis, TN

I think if you had the 4.56's with the 6 speed
you might be o.k. With the TH-400.
The stock 1st gear in a TH-400 is 2.48.
I really don't know about a blower car.
But N/A it would be badass in the 1/8 mile.