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Author Topic:   Stock Cranks
chief4car
Member
posted October 09, 2002 08:14 PM
Guys,

I am building a 12.5 to 1 compression 500 to 550 Hp 406 that will run at about 6800 to 7000 rpms.

Will a stock crank hold up or should I bite the bullet and by aftermarket (not scat ot eagle either)

Thanks
Jim


Monster
Member
posted October 09, 2002 09:41 PM
I've never been impressed with the appearance of stock Chevy cranks, especially the 400s, but you can't judge a book blah, blah, blah.I'm not going to say 'no way', but I guarantee this: you will have a better feeling in your gut with a good strong crank in that engine. Personnally, I have never had a problem with the foreign-forged stuff, but I do check things out very thoroughly before use. I look at them as a good starting point, with more work needed to make them useable. Also, I have never bought a NEW high dollar Crower, Bryant, or Winberg piece for my own personal engines. Good used ones are very available if you don't mind hunting them down. I guess it depends on budget: Little as possible, stock stuff. $500-750, Budget aftermarket. $1000-1500, used hi-dollar. $2000-3000, you are THE MAN, and you probably can afford to pay someone to make this decision for you! LOL! Keep this in mind: when a crank breaks, it usually ruins the block as well, so that should factor into your decision also.


c21
Member
posted October 10, 2002 11:18 AM
Monster,

When you talk about the foreign cranks being a good starting point what do you mean. Do you perform extra machining on them or what.

I have learned a lesson about checking and rechecking things. We lost our last motor to a spun bearing that was probably caused by the big end of the rod not sized properly or out of round, this was a scat rod. This is why I have a bad taste in my mouth for the foreign stuff. But if you have used then succesfully i would like to hear how.

Thanks
Jim


Flatlander
Member
posted October 10, 2002 01:21 PM
we use eagle 4130 steel cranks in our limited late model turning around 7500 to 8000 rpms an had no problems,we also use eagle 6" rods. bye the way we runing 675 horse 383.

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