How strong is the stock crank?
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How strong is the stock crank?
Just as the post says how strong is the stock crank?I know how hard im on my motor with the bottle but what about the turbo cars that are putiing out big number are they stock?And how hard do you think you can spin one without failure.Is it worth buying a aftermarket crank with a short arm stroke.
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I think the stock crank is the strongst part of a stock bottom end. There is forced induction Vette that is doing 790rwhp on the stock crank. However, I'd completely forge the bottom end by 600rwhp, including the crank. Its cheaper to replace the crank than the entire motor.
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The stock crank has been shown to handle over 1K RWHP (thanks Harlan ).
However, i don't know that i'd trust it much past 700 rwhp on a regular basis. Personally if i was going to be using a forged crank i would use that as an opportunity to increase the cubes a little
However, i don't know that i'd trust it much past 700 rwhp on a regular basis. Personally if i was going to be using a forged crank i would use that as an opportunity to increase the cubes a little
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they're good for quite a bit of power. i wouldn't go spraying the hell out of it or dumping 30#s of boost on it, but you can get by with many streetable setups on them w/o trouble.
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Both reference books I have on the LS1/LS6 have nothing but good things to say about the strength of the OEM crank. Just one of many quotes from both books:
"This cast crank is known to consistently handle over 500 hp naturally aspirated and 650 hp turbocharged in street engine usage-a very impressive amount for a cast crank."
"This cast crank is known to consistently handle over 500 hp naturally aspirated and 650 hp turbocharged in street engine usage-a very impressive amount for a cast crank."
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i'm building my first motor for my new setup (second motor will be NASTY) with a stock crank and a 2 stage carb plate that'll spray 600. if the right situation comes up i might see if she'll take the big shot. i've never heard of or seen a stock crank fail. there's so much other stuff that usually goes before it gets that far down.
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800 hp
Originally Posted by tuff
Just as the post says how strong is the stock crank?I know how hard im on my motor with the bottle but what about the turbo cars that are putiing out big number are they stock?And how hard do you think you can spin one without failure.Is it worth buying a aftermarket crank with a short arm stroke.
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Seems like there is alot of postive coments about the stock crank.I just can't see spending the money if the stocker will do. Do you guys think it can take rpms upward of 8500?
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that might be a problem tuff, i plan on taking mine to ~8,000rpm and that makes me nervous. i have one of the best engine builders around building mine and doing the research so it don't spit up. should be ok once or twice for 8500 tho.
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What crank have people been having good luck with.I see the eagles are like 800 bucks.I know the luniti are more money,is it worth the extra.I know some are wondering why im not just going to throw a big arm crank in it while im spending the money.I want the short stroke for nos
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Originally Posted by liftin'em on nittos
tuff, the long stoke will work even better with your "nossssss"