408 vs. 421 Iron Stroker
Teching In
Joined: Oct 2016
Posts: 4
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My fully built and forged 427ci LS6 resleeved block just failed after 173,000 miles and 10+ years of beating the **** out of it. Rod finally broke doing 160mph....
It had a Cola 4.125" crank in it and thats with the old 2002 SHORT sleeves. People have no idea what they're talking about saying its not good and won't work. BUT.....you might have excess oil burning.....maybe not. Brian Nutter at Wiseco has designed a piston that fights oil burning in a 4.125" stroke short sleeve/cylinder length.
After maybe 4 years into owning my 427ci it started burning oil.....I probably put 1qrt in every 2 weeks....but this was my only car, I drove the **** out of it daily.
My friend has an iron 422ci with a 4.125" stroke....he's been spraying a 300 shot for 8 years and the engine is still fine.
Do it....strokers are nice.
I'm having my Cola 4.125" crank cleaned up and resurfaced......gonna sell it for about $800.00. Perhaps the best crankshaft ever made for small block Chevy engines.....
Put that in an iron LQ9 408ci. and it could make 500 RWHP depending on top end. If thats not enough, it'll easily handle a 250 shot all day long.
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It had a Cola 4.125" crank in it and thats with the old 2002 SHORT sleeves. People have no idea what they're talking about saying its not good and won't work. BUT.....you might have excess oil burning.....maybe not. Brian Nutter at Wiseco has designed a piston that fights oil burning in a 4.125" stroke short sleeve/cylinder length.
After maybe 4 years into owning my 427ci it started burning oil.....I probably put 1qrt in every 2 weeks....but this was my only car, I drove the **** out of it daily.
My friend has an iron 422ci with a 4.125" stroke....he's been spraying a 300 shot for 8 years and the engine is still fine.
Do it....strokers are nice.
I'm having my Cola 4.125" crank cleaned up and resurfaced......gonna sell it for about $800.00. Perhaps the best crankshaft ever made for small block Chevy engines.....
Put that in an iron LQ9 408ci. and it could make 500 RWHP depending on top end. If thats not enough, it'll easily handle a 250 shot all day long.
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was looking to do something similar to that myself would like to get more information on it
If memory serves LS6427 was Kurt Urban? He’s with Scoggin Dickey now as lead engine builder last I heard. Call him over there Taylorboi. He will answer any question you would have.
Teching In
Joined: Oct 2016
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Kurt Urban is a legend. Him getting kicked off of here is insane. Somebody send him a bottle of Jack and a formal apology.
