How much hp can a stock 9bolt take?
08-20-2005, 02:19 PM
#1
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Car: 1987 IROC
Engine: 350?
Transmission: 700-R4
How much hp can a stock 9bolt take?
Not an easy one to answer, but say it was going to be a daily driver for a year....
08-20-2005, 02:25 PM
#2
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Car: 1987 IROC, 1989 IROC
Engine: built 305, stock 305 tpi
Transmission: Corvette 700r4, t-5
Axle/Gears: 4.10 posi, 3.08 posi
alot! i'm just kidding i have know idea but there are people on here running 11's with a 10 bolt, so i'd guess more than that.
08-20-2005, 02:31 PM
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Car: 1992 Pontiac GTA
Engine: 305TPI
Transmission: 700R4
Axle/Gears: 10-bolt, 2.73
The guy who runs www.9bolt.com has a healthy BBC in front of his. Here's a link, '88 Camaro with a 427 BBC and a 9-bolt.
08-21-2005, 03:33 PM
#4
Supposedly, it’s somewhere in the same range as a dana 44… what that survives depends on how hard you’re on it doing whatever you do.
I found that with 10 bolts usually the gears break (I’ve broken 6 sets), and occasionally, axles (broke one 28 spline). With 9 bolts the posi is the first to go, but it is rebuild able (I was killing them every 35 passes at the dragstrip on average) but eventually, I corkscrewed both axles causing some very funky bending action in the rear:
Watch the end of the axle/brake rotor vs the center section
I found that with 10 bolts usually the gears break (I’ve broken 6 sets), and occasionally, axles (broke one 28 spline). With 9 bolts the posi is the first to go, but it is rebuild able (I was killing them every 35 passes at the dragstrip on average) but eventually, I corkscrewed both axles causing some very funky bending action in the rear:
Watch the end of the axle/brake rotor vs the center section
08-21-2005, 03:35 PM
#5
FWIW, of the 10 bolt stuff one of the sets of gears was in my crossfire car that ran high 13’s, the rest and the broken axle were in my ’97 WS6, 6 speed, some during 13s NA passes and one set of gears and the axle during an 11s N2O pass. All the 9 bolt breakage was in a stockish, formula 350
08-21-2005, 03:42 PM
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Car: 1987 Black IROC-Z (SOLD)
For what you have listed in your signature and to be used as a daily driver what are you worried about??? Unless you do something dumb or studpid it will last. It will take more HP/TQ then you might make with a stock 350.
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