LT1-LT4 Modifications 1993-97 Gen II Small Block V8

how much power can your stock crank shaft bolts handle

Old 06-02-2009, 02:56 PM
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Default how much power can your stock crank shaft bolts handle

im just wondering since i got a friend that thinks his stock main cap bolts are going to be ok on his 385. I could of swore that those stock bolts are rated at 600hp or something but not positive thats why im asking.

i think he should get some nice bolts like ARP bolt or ??????????????

so how much power can the factory 2 bolts hold

Last edited by aug181983; 06-03-2009 at 01:01 PM.
Old 06-02-2009, 03:03 PM
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What bolts are you talking about?
Old 06-02-2009, 03:07 PM
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the ones that hold down the crank shaft lolol sorry i forgot the name..........i just remember reading something about these bolts holding only so much power
Old 06-02-2009, 03:21 PM
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If you're talking about the factory main cap bolts, they are pretty rigid. I'm using ARPs in my motor though.
Old 06-02-2009, 05:14 PM
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YYYAAaaa thats the name lol , weres the best place to get them from for cheap
Old 06-02-2009, 05:27 PM
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stock bolts are fine IMO for 650 h.p.

If its a 2 bolts its going to beat the hell out of the caps anyway....
Old 06-02-2009, 05:29 PM
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ya i think he needs to get some main stud bolts cause i know he will be pushing well over 500 on motor.plus he wants to toss on a 150-250shot and it is a 2bolt main.
Old 06-02-2009, 05:39 PM
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i know va guy on this board that is making 459 to the wheels. and spays a 175 on it.. making prob 650-675 rwhp. he has a nitrous cam.. his has lived for 4 -5 years now.. he dumps the clutch at 6000 with slicks. hooks right up and then spays second gear.. i won't advise this much power.. it will break.. soon. o hyea. stock bottom end. never been out of the car..
Old 06-02-2009, 05:44 PM
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Competition Products in Oshkosh is a good source for this sort of stuff.

Thing is though he needs to use hardware of the type the block was line honed with. If it was line honed with stock bolts then I would recommend staying with a bolt. If the line hone is not done yet I would go ahead and do studs.
Old 06-02-2009, 05:48 PM
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Originally Posted by 96capricemgr
Competition Products in Oshkosh is a good source for this sort of stuff.

Thing is though he needs to use hardware of the type the block was line honed with. If it was line honed with stock bolts then I would recommend staying with a bolt. If the line hone is not done yet I would go ahead and do studs.
I use Competition Products all the time with my circle track stuff. Great company. I agree if he hasn't align hone or went to splayed the stock bolt should be fine.
Old 06-02-2009, 07:29 PM
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They are only 30 minutes away from me, so they have save a project timeline or two for me.
Old 06-03-2009, 01:01 PM
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so how much power can the factory 2 bolts hold
Old 06-03-2009, 01:16 PM
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Originally Posted by aug181983
so how much power can the factory 2 bolts hold
No one can tell you a magic number. My guess would be, a bunch.


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