Pistons and compression ratios - Saab Performance Bulletin Board - Saabnet.com
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Pistons and compression ratios
Posted by Thorir Jonsson (more from Thorir Jonsson) on Fri, 23 Sep 2005 11:15:49
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Well as this subject has already been talked to death (or typed actually) I'm not going to bore you with more questions.
Using the combustion chamber volumes I found on this forum (http://www.saabnet.com/tsn/bb/performance/index.html?bID=49328) and the compression ratios found in various repair manuals, I've calculated the different compression ratios using all the different pistions with each head.
While I'm pretty sure my calculations are correct I have not measured the cc volumes myself so I can't make any garantees of the accuracy of these numbers. Also note that I have no idea if all (or any) of these combinations work because of valve clearance.
p.s. if you know the compression ratios of the 2,3 liter engines and the 8 valve engines after '83 (I think they were unchanged but it would be nice to know) I'd like to know so I could add these pistons to the mix.
Enjoy.
posted by 81.15.4...
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