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53hemi
02-25-2013, 11:34 AM
Ok - what's the formula to figure engine size? I've got a 650 bored .120 over. Thanks in advance!

Brendden
02-25-2013, 12:03 PM
Ok - what's the formula to figure engine size? I've got a 650 bored .120 over. Thanks in advance!

http://www.csgnetwork.com/cubicinchcalc.html

CRFyou
02-25-2013, 12:32 PM
Ok - what's the formula to figure engine size? I've got a 650 bored .120 over. Thanks in advance!

In your profile, it says you have a BSA.

You bored a BSA .120 over?

53hemi
02-25-2013, 4:47 PM
Hi - thanks - when I bought the motor the guy ( a friend ) said it was .120 over. I have no idea how true that is. I believe the guy, but I certainly may have misunderstood him. When I typed this question today I thought it sounded like a lot, but I'm a noob.

BillySlicks
02-25-2013, 5:51 PM
I hope for your sake that's wrong. Ask again.
I'm not even sure that's even possible

53hemi
02-25-2013, 6:14 PM
I'm probably wrong - I'll ask this weekend. Thanks, guys.

CRFyou
02-25-2013, 6:16 PM
Yeah. I would think you'd be into the threads for the head bolts.

Measure the bore of the cylinder.

Slimey1
03-02-2013, 11:38 AM
it's piR2 x bore x stroke x # of cylinders. Pi is 3.14 so the formula is 3.14 x radius Squared x bore x stroke x # of cylinders.