Quote:
Originally Posted by mgarblik
I have never had a cast N crank break or an Armasteel crank break in my older 421 days. They have just been very dependable. Possibly just incredible good luck, I don't know. The N cranks we ran in the Grocery Getter drag engines in stock block 455's. Made around 1000,1100 HP spraying the heck out of them. Aluminum rods, extra wide fillet radius ground in, 2% overbalance. 5 billet main caps. We broke 3-455 blocks all in the same place up through the #2 main oil feed hole up to the cam tunnel. Never failed a crankshaft. I know they do break every now and then because I have seen pictures posted here.
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The wife fillet radius is how I’ve always made mine live . It makes a HUGE difference.
As I recall the only differnce w the SD cranks were the radius Vs the same part number regular 455 cranks??
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Happiness is just a turbocharger away!
960 HP @ 11 psi, 9.70 at 146.
Iron heads, iron stock 2 bolt block , stock crank, 9 years haven't even changed a spark plug!
selling turbos and turbo related parts since 2005!
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