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anyone know how to calculate compression ratio


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according to the manual the bore is 64mm (2.52in) stroke 54mm(2.13in) and stock compression is 6.5:1

332461[/snapback]

 

 

Stock stroke is 54mm (2.12598) stock bore is 64mm (2.51968)

To convert mm to inches multipy by .03937

So 64mm X .03937 = 2.51968 :cheers:

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im going to guess i did that right with pluggin in the numbers...

 

 

Engine Bore 65.5mm

Engine Stroke 54mm

Deck Height * ?

Combustion Chamber CC's 19cc

Your Compression Ratio is 10.6

Number of cylinders 2

Your Displacement is : 364cc or 22ci

 

that seem right... i didnt know my deck height of a noss head with 19cc domes...

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