Bore x Bore x stroke x7854 x # of cylinders.
Looking for a little help here, what is the formula to figure out the cubic inchs of a motor like when you want to make one bigger. It was something like stroke x rod length x cylinder diameter x blah blah blah = cubic inch. It was explained to me years back and I will be damed if I can remember.....should have wrote it down. Thanks to all the smart guys that can help me with this.
Bore x Bore x stroke x7854 x # of cylinders.
Sawtooth, check out the first thread in this forum. It is called "Tech Links". There are links there to tons of info including this. BRC Engine Calculators (http://www.brcperformance.com/enginecalc.htm)
CI = (bore/2 x bore/2) x 3.1416 x stroke x # of cylinders
Ex:
4.500 bore
4.250 stroke
(2.250 x 2.250) = 5.063
5.063 x 3.1416 = 15.906
15.906 x 4.250 = 67.601
67.601 x 8 = 540.808 CI
HAHA Two replies while I was typing my formula!!
Bore x Bore x stroke x7854 x # of cylinders.
I think you meant .7854
What they said... Or go here
http://brcpistons.com/enginecalc.htm
Or Use This... http://marineassault.net/211CID_Chart.jpg
Radius of cylinder squared X pie X # of cylinders.
Not bad for a guy who's math classes were always right after lunch.
Radius of cylinder squared X pie X # of cylinders.
Not bad for a guy who's math classes were always right after lunch.
You have been eating too much PIE!
That formula gives you the total surface area of the tops of the pistons if they were flat tops with no valve reliefs. pi x r squared gives you the area of a circle.
Superdave you must have been late that day. You need X stroke=cid