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Compression Question

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Old 07-05-2005, 06:35 AM
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Default Compression Question

I have 241 heads on my motor that have been milled .035" (.030" originally, then a later .005" freshening). Can someone tell me my approximate compression ratio with stock heads and gaskets? Thanks!
Old 07-05-2005, 06:51 AM
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click on jrp faq page and pull up the engine compression calculator. based on your figures and assuming pistons are out of hole .007 cr is approx. 11.2:1
Old 07-05-2005, 07:02 AM
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Ok. Thanks for the tip and the information!
Old 07-05-2005, 08:26 AM
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I only get 10.8:1 SCR
This is the calculator:
http://www.c5frc.com/calculators/Com...Calculator.htm
.007 out of hole piston
.053 graphite gasket
60.84 CC head
Old 07-05-2005, 02:15 PM
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Here is another one!!

http://www.rbracing-rsr.com/compstaticcalc.html
Old 07-05-2005, 02:54 PM
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Originally Posted by PREDATOR-Z
I only get 10.8:1 SCR
This is the calculator:
http://www.c5frc.com/calculators/Com...Calculator.htm
.007 out of hole piston
.053 graphite gasket
60.84 CC head
Using that calculator, that's what I get also, 10.8:1.
Old 07-05-2005, 03:00 PM
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See, the calc uses correct specs to .001 of an inch. not rounded off figures.
Old 07-05-2005, 03:12 PM
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Originally Posted by PREDATOR-Z
See, the calc uses correct specs to .001 of an inch. not rounded off figures.
Thanks!
Old 07-05-2005, 07:41 PM
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Wish I knew my correct out of the hole value, .007 is a guess.

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Last edited by wallstAL; 07-05-2005 at 07:48 PM.




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