4.00" stroke in LS2 block safe ???

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Apr 12, 2006 | 11:56 PM

SuperSporttruck

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From: Redondo Beach,CA

4.00" stroke in LS2 block safe ???

I have a quesion for guys that are familiar with running a 4" stroke in a LS2 block vs Iron LQ9 block. I have heard that the sleeves in the LS2 block are a little short for running that 4" stroke. Basically I wanted to see from a longevity point of view, does the piston come down out of the cylinder enough to warrent going to the iron block because the cylinders are a little longer and the rigitity is much greater. Or is it not really that much to worry about. Thanks

Apr 13, 2006 | 01:10 PM

NEVRLIFT

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It will be fine. There are many, many 402ci LS2 engines out there now.

Apr 13, 2006 | 04:10 PM

Randy WS6

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From: Baxter,KY.

I have a 4.100" stroke in my 05 aluminum LS2 418

Apr 13, 2006 | 06:10 PM

firefighter

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From: TAMPA by way of MIAMI!!!

what rod do you run with that?

Apr 13, 2006 | 06:10 PM

firefighter

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From: TAMPA by way of MIAMI!!!

rod length I mean.

Apr 13, 2006 | 07:24 PM

Randy WS6

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From: Baxter,KY.

6.125" rods, The crank its self isn't the problem, its the rod bolts,The stroke of the crank causes the circumference of the rotation larger and causes the rod bolt to come in contact with a few things ,like cylinder walls and oil pan (F-Body) and windage tray ,that's the problems that i had but not hard to fix with a die grinder