beerock
10-15-2002, 01:16 PM
well due to a bad hone job my piston had blow by and never broke in correctly(and almost seized)-but it didnt.
it did break in, but the seize put minor scuffs in the piston and caused a break up at mid throttle that drove me crazy....
so now, im going to my 7th bore size (67.75mm over stock bore)
heres the formula:
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) 3.385mm
multiply by stroke converted to centimeters (72mm= 7.2mm)
3.385mm x 7.2mm = 24.372mm x Pie(3.14) = 76.52808mm x 3.385(bore size = 259.0475508)
so im creepin up on 260cc :)
convert milimeters to inches divide milimeters by 25.4
convert thousanths to milimeters multiply by 25.4
it did break in, but the seize put minor scuffs in the piston and caused a break up at mid throttle that drove me crazy....
so now, im going to my 7th bore size (67.75mm over stock bore)
heres the formula:
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) 3.385mm
multiply by stroke converted to centimeters (72mm= 7.2mm)
3.385mm x 7.2mm = 24.372mm x Pie(3.14) = 76.52808mm x 3.385(bore size = 259.0475508)
so im creepin up on 260cc :)
convert milimeters to inches divide milimeters by 25.4
convert thousanths to milimeters multiply by 25.4