OEM Crankshaft differences?
10-26-2013, 06:23 PM
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OEM Crankshaft differences? Howdy,
Currently building a forged LQ4, and looking to take an OEM crankshaft to the 1000whp mark.
Is there any differences at all in strength between the LS1/6 and LQ4/9 crankshafts? I know the early LQ4 was longer and some of the LS car cranks were drilled, but barring that, are they all the same in terms of strength?
Currently building a forged LQ4, and looking to take an OEM crankshaft to the 1000whp mark.
Is there any differences at all in strength between the LS1/6 and LQ4/9 crankshafts? I know the early LQ4 was longer and some of the LS car cranks were drilled, but barring that, are they all the same in terms of strength?
10-29-2013, 05:26 PM
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Yes the difference is the fly-weights are different weight for each different piston/rod/rings/bearings/pin weight .
As far as strength is concerned , RPM's are the main killers of stock bottom ends but 6500rpm's @ 700-800 hp safely . This info is from this forum since 2009. There are many guys that take Their engines to higher RPM's and Their engines last 4 many years as long as You're tune and balance are both spot on You can get away with 7000-7300 RPM's
As far as strength is concerned , RPM's are the main killers of stock bottom ends but 6500rpm's @ 700-800 hp safely . This info is from this forum since 2009. There are many guys that take Their engines to higher RPM's and Their engines last 4 many years as long as You're tune and balance are both spot on You can get away with 7000-7300 RPM's