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Gm nodular iron crank

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brian777

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« on: November 29, 2015, 03:57:17 PM »
What are your thoughts on this crank also what is a safe hp to run with it? Thanks in advance


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jyeager

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« Reply #1 on: November 29, 2015, 06:10:50 PM »
Flusher or Bostick to the SCJB Phine Please


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GT Jets

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« Reply #2 on: November 29, 2015, 06:26:40 PM »
RPM is a cast cranks arch nemesis.

About 550 horsepower and 5,200 rpm is my line in the sand.

Heard of much more, but I think luck plays a big part.

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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
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« Reply #3 on: November 29, 2015, 06:35:34 PM »
I'd say 550-600 hp is about the limit... BUT... 6000 rpm is also about all I'd spin one up to... And not 6000 and keep it there... Like "oops... I went 6000"... I've gone harder on them... But then I've also had them let go at less... Harmonics are the devil on cast cranks.


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