Thread:

454 5140 crankshaft

i have a question about a crank. i'm building a 100 over 454 chevy for my sanger ski hydro. my target hp is about 700. i have a nos forged 5140 crank part #3963524. i was told this crank will not support that kind of hp. what do you guys think? thanks, bill

mine is 100 over but internal bal very snappy

Better be sure it is straight.

That crank will be fine make sure to have it checked for cracks and straiteness mines was bent .003 had it straiten and make sure you have a good balence job I had one in a 477 cu 14.2.1 comp motor turned it 7600 and held up

thanks for your help. many people think its ok. i think he wants to sell me new parts. going to look for a new machine shop.

I`m no expert by any means however I had my .030 454 block split a sleeve and trashed the whole motor...I know some people that have done that .100 over and never had a problem me I dont have that luck