Quote:

I don't know what to enter for:

Cylinder Head Volume (cc) [Is that 90cc? If so, I milled them 0.030]

Piston Head Volume (cc) ?

Gasket Bore (in.) ?

My pistons are flat tops, no valve reliefs.

Here's a picture of what I've entered so far.



if you took off .030 then 85cc is a safe number as I have seen these open chamber heads anywhere from 90-92cc. Steel shim gasket is going to be roughly 4.410 bore size , .021 thick .

I use the calculator at Diamondracing.net