compession ratio

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Jul 4, 2006 | 08:31 PM

cossiedrift

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From: portsmouth

compession ratio

how do i calculate compression ratio????

thanks danny

Jul 6, 2006 | 08:20 PM

AlexF

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From: Newbury

Combustion Chamber Volume + Swept Volume

CR = -------------------------------------------------------------------

Combustion Chamber Volume

or use

http://www.afracing.com/cr.xls

Jul 7, 2006 | 12:49 PM

GARETH T

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From: barry-south wales

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Jul 7, 2006 | 03:43 PM

Anonymous

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cr = Unswept / (swept + unswept)

unswept = head volume + space above piston at TDC + gasket thickness
swept = capacuty of engine / number of cylinders

There are some other tiny factors, but thats essentially it