discopotato03 Posted December 14, 2007 Share Posted December 14, 2007 Hi all , I understand that 1986 build NA carby pistons are supposed to be 8.7:1 compression ratio . Can anyone tell me how to tell the various EA82 NA pistons apart CR wise ? Part numbers would be handy as well if anyone has them . Cheers and thanks , A . Link to comment Share on other sites More sharing options...
ccrinc Posted December 15, 2007 Share Posted December 15, 2007 Carbureted pistons differ in looks from SPFI only by the fact that SPFI pistons are directional. That is, they both have the half moon indentations, but SPFI will have an R or L and an arrow pointing to the front of the block. Carb pistons do not have that. Turbo pistons dished. MPFI uses SPFI pistons in a turbo block. Emily http://www.ccrengines.com Link to comment Share on other sites More sharing options...
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