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What CP pistons do I need?

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Old 02-18-2013, 12:11 PM
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Default What CP pistons do I need?

Going to be boring/honing out my block to either 4.020" or 4.030" bore. Trying to look on the CP piston website for what I need and their site isn't very user friendly in the sense that's it's easy to search for what I need for my application.

Stock LS2 everything minus the bore of the block. I want valve reliefs in the pistons, which seems like all of their pistons come with anyways. Does anyone know what part number I need?

thanks.

-Don
Old 02-18-2013, 12:57 PM
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All of it depends on your setup. Too large of a relief and youre gonna lose compression. Not enough relief and your valves will hit.
Old 02-18-2013, 01:05 PM
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I don't think you can select valve relief, so that's not as much of an issue as far as figuring out which piston I need from them.

-Don
Old 02-18-2013, 01:23 PM
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You should be able to, there are all different ones from -10cc - +10cc and beyond and everything inbetween.

Then youve got domed, dished, flat etc
Old 02-18-2013, 01:26 PM
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Might want to get that blocked checked out if you want to take it 0.020 or 0.030 over.
Old 02-19-2013, 10:43 AM
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Are you building the motor for boost or NA?
Old 02-19-2013, 10:45 AM
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I am building it for NA.
Old 02-19-2013, 11:42 AM
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Don, why dont you PM me with your entire build youre planning and I'll try to help you out, or at least get you going in the right direction.
Old 02-19-2013, 04:43 PM
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CP doesn't have anything listed on their site, like you need. They do have a low compression piston or some with a larger bore.
Old 02-19-2013, 05:33 PM
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Why CP? Why not Wiseco?



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