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 Blocks / Cranks/ Rods and Pistons
 455 Broken Cranks
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bluebird
Cochise

USA
292 Posts

Posted - 12 Jun 2015 :  12:51:15 PM  Show Profile  Reply with Quote
I am working with a machinist to build a 455 punched .040, 60919 cam, E-heads, Icon pistons, Eagle rods. My current crank has a scored rod bearing surface. I'm guessing the engine should be making just over 500 HP. Should the stock crank that is already turned 10/10, be turned more and nitrided ($200)? Or should I look into a an aftermarket crank, and if so what kind? Eagle has cast steel ones for $280, but my machinist said he has had several break with very little hours and will not use Eagle cranks again. I'm not trying to bash Eagle or anything, I'm just looking for a cost effective way to have piece of mind my crank won't break. I realize stepping into a forged crank is probably the answer but they are around $800 and if there is one that can safely handle 5-600HP for half the price I'm all ears.

"Experience is the best teacher, unfortunately, it's the costliest!"

tjs44
Cochise

USA
413 Posts

Posted - 12 Jun 2015 :  5:13:06 PM  Show Profile  Reply with Quote
They turn them more to use BBC rods!Should be no issue.Tom
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PontiacMatt
Many Ponies

USA
1410 Posts

Posted - 23 Jun 2015 :  11:36:14 AM  Show Profile  Reply with Quote
Factory cranks are pretty tough, I would rather run the factory crank with those upgrades that the aftermarket cast. Just my opinion. Talk to known Pontiac shops like Butler or our own Mr. P body, Jim Lehart at Central Virginia machine.

*72' Pontiac Lemans* - Work in Progress
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