Calculating compression ratio

**Pistonhead** · 03-03-2005, 07:41 PM

Alright, I need to know the formula for calculating compression ratio, I have bore, stroke, # of cylinders, displacement and clearance volume. What formula would I use from here to calculate the compression ratio?

**Mobular** · 03-03-2005, 07:57 PM

You'll need to know your combustion chamber volume too.

Try this calculator.

**CHAINSAW** · 03-03-2005, 08:15 PM

what calculator Mobular?

**Mobular** · 03-03-2005, 08:56 PM

D'OH!

Here it is....
http://www.performancetrends.com/cr12.htm

**Pistonhead** · 03-03-2005, 09:23 PM

Thanks!!!!!!!!!!!!

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Calculating compression ratio