What do those comp values mean?
09-28-2013, 03:27 AM
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What do those comp values mean?
Hello
I've come across an RX-8 advertisement which showed its compression tester values. The seller says the compression value of an unused RX-8 is 10.5 and the value of this one is 8.9. What do those comp values mean? Is the 8.9 value ok?
I've come across an RX-8 advertisement which showed its compression tester values. The seller says the compression value of an unused RX-8 is 10.5 and the value of this one is 8.9. What do those comp values mean? Is the 8.9 value ok?
09-28-2013, 07:22 AM
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Serious?
You've ruined my whole day already.
But here you go ... Post #8 and there's a beautiful graph as well.
Remember they should be normalized to 250 rpm
https://www.rx8club.com/new-member-f...4/#post3664045
Try doing some reading please
You've ruined my whole day already.
But here you go ... Post #8 and there's a beautiful graph as well.
Remember they should be normalized to 250 rpm
https://www.rx8club.com/new-member-f...4/#post3664045
Try doing some reading please
09-28-2013, 08:55 AM
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Remember that compression ratio is not the same thing as a compression score
The compression ratio is (roughly) a measurement of the difference between the combustion chamber fully expanded vs fully compressed. The compression score is a measurement of actual pressure on a compression stroke of nothing but air, and the actual compression score varies by altitude, temperature, engine speed, engine health, tester methods, etc...
The compression ratio is (roughly) a measurement of the difference between the combustion chamber fully expanded vs fully compressed. The compression score is a measurement of actual pressure on a compression stroke of nothing but air, and the actual compression score varies by altitude, temperature, engine speed, engine health, tester methods, etc...
Last edited by RIWWP; 09-28-2013 at 09:45 AM.
, I don't see anywhere near that even with my brand new S2 starter and brand new battery.
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