Work out CC

[Hughieboy]

Anybody know how to work out cc...??

I have a GT186 with a 116mm conrod, 58mm stroke.

8mm of packers and gaskets at the base and a 2mm head packer plus regular thickness gasket. I just wondered what the calculation is?

Cheers!

[MickYork]

Your cc wont change.

cc = stroke x area (barrel radius squared x pye)

[Hughieboy]

So when a 60mm stroke increases the capacity, is that because it’s travelling 1mm further either way? Meaning that with mine you discount the packers, ie it just pushes everything away a bit but doesn’t increase capacity?

That would make sense if I’m thinking correctly.... therefore it doesn’t matter how thick the base/head packing, if it’s a 58mm stroke it remains 186cc?

[MickYork]

Yup, you've got it

[Hughieboy]

Brilliant, thanks!

[dscscotty]

try this-0.785 x bore x bore x stroke so for gt 186 with 60mm stroked crankshaft- 0.785 x 64 x 64 x 60 = 192.9cc

[Feersum Injun]

^^^ this ^^^