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-   -   RSR pistons in a 3.0 - CR seem right? (http://forums.pelicanparts.com/porsche-911-technical-forum/385764-rsr-pistons-3-0-cr-seem-right.html)

haycait911 01-05-2008 05:51 PM
RSR pistons in a 3.0 - CR seem right?
 
looking to put 3.0 RSR pistons in an '82 3.0 with stock heads. I come up with a CR of about 8.4:1. does this seem reasonable. figuring an RSR combustion chamber volume at 76cc ( according to Bruce Anderson ) and the SC at 86cc ( measured by me). the pistons are 10.2 RSR pistons so with the larger combustion chamber of the SC, using a compression ratio calculator, I came up with 8.4 ( or so ) as a CR. any thoughts?


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