Gearing for a high HP boosted engine
11-22-2012, 08:21 PM
#1
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?
11-22-2012, 08:34 PM
#2
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.
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.
11-22-2012, 09:55 PM
#4
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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.
Less rear gear = more converter slippage = less power being transferred to the transmission and thus to the tire.
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11-24-2012, 10:38 PM
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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.
