Tom@SpeedInc

iTrader: (5)

Anyone know the difference between

GEN III 5.3-5.7-6.0 crankshaft part number 12559354

L92 6.2 crankshaft part number 12584997

Other then the reluctor ring are these the same crankshafts?

ty

DoesSpeedTurnUon

iTrader: (17)

I was told they're all 3.622 stroke. different bore sizes for different motors.

Karlo

I was wondering the same thing? The Price is hard to beat also?

12584997 GM Performance Crankshaft Assembly 2007 L92 $220.97

bg-sdpc

iTrader: (4)

The only differences are the reluctor ring and that they are balanced differently because they have different bob weights. If you are building a custom engine with one of these cranks it will not matter which one you use because it will be rebalanced to the new parts. Just make sure you have one with the correct reluctor.

WizeAss

iTrader: (5)

I thought the L92 engine had a forged crank??

bg-sdpc

iTrader: (4)

The original press release that came out said they were forged but they are not. It is a standard cast crank.

99Fbody99

Beside the balance weights the truck crankshafts are not gun drilled for weight reduction.

Dave

Tom@SpeedInc

iTrader: (5)

the LS1 crankshaft was nodular iron (iirc) is L92 crankshaft likewise? or weaker?

big b

iTrader: (2)

So what relucter ring does the l92 crank come with? Looking at possibly building a mild street engine with this crank. And the price is almost too good to pass up. Is it the same as any other gen3 truck engine? Are there any reasons not to use this crank? "hp/tq limits"...

chris.shea

Why not stick with a stock(proven strong)? any reason gm is casting new cranks if they all have the same throw?

NO-OPTION-2002

iTrader: (2)

it's cheaper to build a few specific cranks than to balance each individual engine.