bore size

[baseballplaya23]

if a motor is bored to a 68.25 mm what is that equivalent to in cc's?

[punker69q]

263.4 cc

[beerock]

how to figure bore size out:

divide piston size by 2 (67.75mm(my piston = 33.875mm)

then convert to centimeters(move the decimal point over a place) 3.3875mm

multiply by stroke converted to centimeters (72mm= 7.2mm)

3.3875mm x 7.2mm = 24.372mm x Pie(3.14) = 76.5846mm x 3.3875(bore size = 259.4303325)

convert milimeters to inches divide milimeters by 25.4

convert thousanths to milimeters multiply by 25.4

[wilkin250r]

Just so you know, the correct spelling of the greek letter "pi" has no "e" on the end. ;)

[250r4life]

ha ha ha ha... with all the incorrect grammar and spelling that goes on here, that is hilarious that correct him on that :) i usually laugh at a lot of what people write on here, but didnt catch that one... i dont remember jr high all too well, but i swear they spelt it pie back then... then again, i know teachers arent neccessarily the smartest people out there either... who knows...