The conversion is to multiply cu inches by 16.387 to get cc
Examples:
.46 cu in engine x 16.387 = 7.5cc
1.20 cu in engine x 16.387 = 19.66cc
So easy even a caveman could do it !
The actual multiplier is really 16.387064 but I just rounded down a little to 16.387 to make it easier
