AHA:

"alternatively multiply the compression ratio by 20 if you want to work in
psi"

So, what is a stock Miata, 9.5:1, right?  x20 = 190psi...  That jive with
what everyone has seen?

That means the LT1 would be 10.4 x 20 = 208psi...

Wallyman




                                                                       
             Ashraf Farrag                                             
             <[EMAIL PROTECTED]                                   
             rg>                                                        To
                                             [EMAIL PROTECTED]   
             10/27/2008 04:16 PM                                        cc
                                             [email protected] 
                                                                   Subject
                Please respond to            Re: NMC - How to figure   
             [EMAIL PROTECTED]         "perfect" compression for a
                        g                    compression check?        
                                                                       
                                                                       
                                                                       
                                                                       
                                                                       
                                                                       




Math and Physics?  :)

Compression numbers are a pressure - lbs/sq in.  You should be able to
work backwards from there to the basic fluid dynamics of a pump to
determine what the perfect pumping efficiency would be of each cylinder.

Top result from googling "calculating engine compression pressure" gets
you this:
http://www.cavweb-forums.co.uk/showthread.php?t=71683

Regards,
--Ashraf

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