how to tell the cc's

[Antec1200X]

from stock to ported and bored out to 67.5mm with ken's redesigned head.how much cc's can i expect?

 

[TechBlaster]

Not much in CC. Porting will add flow velocity, not bore size.
Your 67.5mm piston will increase your bore to now 204cc. If you had a +3 stroker crank, then call it 215cc.

The head mil will only add compression, not CC size.

So, if no stroker crank, with your mods, then 204cc, or .060 over, for your bore size.

Hope this helps...

 

[Antec1200X]

so a 204,better then a 195 or what ever stock is
Thanks
cookie given

 

[TechBlaster]

Glad to help.
No doubt, every CC helps, right????

Here is some good chart info posted by Freek a while back, think it may have been sticky'd too?????

Bore - CC - Stroke

Peace I:I

 

[Antec1200X]

i didnt even see that.but thanks anyways

 

[99LRDblaster]

It will be whatever bore spec your cylinder is unless your head has had the cc's of displacement changed. I might be wrong but I think the stock head is 19cc. Either way, displacement is the same.

 

[99LRDblaster]

As a side note, here is a nice link for determining everything. For comp ratio you would need the dome displacement which you can get by filling the head with water(with the spark plug in), then measuring the amount of water in the head. From there you can get a reasonable idea as long as you know gasket thickness.
Calculating Cubic Inch Displacement & Compression Ratio