3.79 Stroke CRanks

haplo555 said

well of course a forged crank is better, but i run a cast crank in a light altered, that run 8.20 shift at 6200 , the motor is a 417 ,w5 heads alcohol injected making 700 at flywheel, altered weights 1950, been runing motor for 6 years no problems yet????????? Rpm is what kills a cast crank.

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There are always exceptions to the rule.You're running alcohol in a very light altered. We both know alcohol is way easier on parts in comparison to a gas motor on a 200 shot in 3000 lb car. I'm guessing that you're not running SIR rods and have done quite a bit to reduce reciprocating weight. Plus, not many people know how to make 700 hp @ 6000-6200 rpm without N20. Also, is that a 30-35 year old factory crank? I'm guessing not. I'd still tear it down once a year and have it magnafluxed if I was sitting behind it.

BTW: That sounds like a bitchin' build you got there. Care to share?