oversizing a cylinder bore
10 May 2002, 12:22 PM
#1
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Volume = pi * r^2 * h
where r is the radius (half the bore) and h is the stroke. Divide by 1000 for numbers in mm to get cc capacity.
I think your bore value is wrong. If you work it out with 87mm bore and 90mm stroke, you get a capacity of 2140 cc. Looking here, it says the bore is 84mm, which works out at 1995 cc, the value we're expecting.
Overboring by 0.4mm takes you up to 2014cc, by 0.6mm up to 2024cc. Got to be worth another 100bhp easy.
where r is the radius (half the bore) and h is the stroke. Divide by 1000 for numbers in mm to get cc capacity.
I think your bore value is wrong. If you work it out with 87mm bore and 90mm stroke, you get a capacity of 2140 cc. Looking here, it says the bore is 84mm, which works out at 1995 cc, the value we're expecting.
Overboring by 0.4mm takes you up to 2014cc, by 0.6mm up to 2024cc. Got to be worth another 100bhp easy.
05 October 2002, 11:57 AM
#3
My integrale needs a re-bore 
and I have to go .4mm oversize or .6mm. My question is what increase in cc will this give my engine (if alot??) Its 1995cc as standard and the bore size is 87mm and the stroke is 90mm 
Any help would be apprecited. Thanks in advance 
[Edited by paulpalmer - 5/10/2002 12:01:30 PM]
and I have to go .4mm oversize or .6mm. My question is what increase in cc will this give my engine (if alot??) Its 1995cc as standard and the bore size is 87mm and the stroke is 90mm Any help would be apprecited. Thanks in advance [Edited by paulpalmer - 5/10/2002 12:01:30 PM]
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