LS2 / 403 Piston Recommendations I'm building a 402/403 using a new GM LS2 block for my '02 Z28. The car will be a Power Tour / fair weather driver with a road race thrown in a few times in the summer. CR will be ~11.7:1, no nitrous or boost. I'm using a Compstar 4" stroke crank and 6.125" rods. I'll bolt-on my existing PRC LS6 heads. For pistons I'm leaning towards a 4032 flat-top forging like JE/SRP #279585. I would think reduced piston-to-wall clearance will keep the piston from rocking at the bottom of the stroke. I don't need a noisy oil burner. Let me know what you guys think of these pistons and / or anything else you recommend. |
Originally Posted by hiltsy855
(Post 20047541)
I'm building a 402/403 using a new GM LS2 block for my '02 Z28. The car will be a Power Tour / fair weather driver with a road race thrown in a few times in the summer. CR will be ~11.7:1, no nitrous or boost. I'm using a Compstar 4" stroke crank and 6.125" rods. I'll bolt-on my existing PRC LS6 heads. For pistons I'm leaning towards a 4032 flat-top forging like JE/SRP #279585. I would think reduced piston-to-wall clearance will keep the piston from rocking at the bottom of the stroke. I don't need a noisy oil burner. Let me know what you guys think of these pistons and / or anything else you recommend. |
I wish Wiseco made their Pro Tru Street piston for my application. The Summit line looks interesting. |
KCS - Are you saying the JE / SRP pistons I referenced have the "improper" skirt design? |
Originally Posted by hiltsy855
(Post 20048090)
KCS - Are you saying the JE / SRP pistons I referenced have the "improper" skirt design? https://www.onallcylinders.com/2019/...s-engine-easy/ |
Racetech Forged pistons = OK Hi 855, I can supply a Forged Racetech piston (4032). I have done this often with a 4.0" shaft and 6.125" rods.(flat top piston) A TOP Quality part at a FAIR price. Lance 949-250-1797 |
Great info. Thanks guys!!! |
I need your help
Originally Posted by hiltsy855
(Post 20047541)
I'm building a 402/403 using a new GM LS2 block for my '02 Z28. The car will be a Power Tour / fair weather driver with a road race thrown in a few times in the summer. CR will be ~11.7:1, no nitrous or boost. I'm using a Compstar 4" stroke crank and 6.125" rods. I'll bolt-on my existing PRC LS6 heads. For pistons I'm leaning towards a 4032 flat-top forging like JE/SRP #279585. I would think reduced piston-to-wall clearance will keep the piston from rocking at the bottom of the stroke. I don't need a noisy oil burner. Let me know what you guys think of these pistons and / or anything else you recommend. |
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