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Gearing for a high HP boosted engine

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Old Nov 22, 2012 | 08:21 PM
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Default Gearing for a high HP boosted engine
I think I may have to change mine. Currently own 3:90. I haven't ran it yet so not sure how it will work but I am running a 1000 HP TT 408 in a 66 Nova. I will run a 4l80e with a 26 inch tire. This is a street car. What are you guys running? Would I be better off with a 3:55?
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Old Nov 22, 2012 | 08:34 PM
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I'd go 3.25's.

My 71 Nova has around 800rw and an 80E with 3.42's, works good.

Another guys car that I work on has 1000rw with an 80E and 3.25's. Feels good, maybe could go a tad higher like a 3.00.

More power equals less gear unless your running 8th mile or something.
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Old Nov 22, 2012 | 08:48 PM
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Originally Posted by LS1NOVA
I'd go 3.25's.

My 71 Nova has around 800rw and an 80E with 3.42's, works good.

Another guys car that I work on has 1000rw with an 80E and 3.25's. Feels good, maybe could go a tad higher like a 3.00.

More power equals less gear unless your running 8th mile or something.
3.00......sounds like what I need maybe. I should be a little over 1,000 RWHP.

What brand gears are best for my Strange 12 bolt?

.
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Old Nov 22, 2012 | 09:55 PM
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Does 1/4 or 1/8th mile performance matter?

Less rear gear = more converter slippage = less power being transferred to the transmission and thus to the tire.
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Old Nov 22, 2012 | 11:47 PM
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Car will see more street than track
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Old Nov 24, 2012 | 08:23 PM
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What's a 26" tall tire doing on a 1000 horse TT? Where do you shift it? 8000 rpm?
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Old Nov 24, 2012 | 08:51 PM
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^^ it's a pro touring car with 18 inch rims. Realistically closer to 800 HP on the street.
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Old Nov 24, 2012 | 09:11 PM
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Originally Posted by eb02z06
What's a 26" tall tire doing on a 1000 horse TT? Where do you shift it? 8000 rpm?
Why would a 26" tall tire mean he has to shift it at 8k? Some cars do everything not just go in a straight line.
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Old Nov 24, 2012 | 10:38 PM
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Originally Posted by LS1NOVA
Why would a 26" tall tire mean he has to shift it at 8k? Some cars do everything not just go in a straight line.
Sorry-I'm narrow minded when it comes to anything but drag racing.

For street use I have a set of 345/30/19's, a set of 345/35/18's and some 325/40/15's.

I use the 325's and some 2.93's for half mile racing.
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Old Nov 24, 2012 | 10:45 PM
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I'm leaning towards 3:20 or 3:50 due to the 4l80e. I have 3:55 in my camaro with tko600 and 25 inch tire. Less HP but rides great all around.
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Old Nov 24, 2012 | 11:44 PM
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Im rockin 3.08's with a th400 on 315/35/17 (26")street whhels and 295/55/15(28") drag radials for the track.
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