[Tom Vaught]

From a guy who uses a lot of formulas, a piece of advice.

A Formula is only as good as the information you put into the formula.

At some point you need to know how to do the actual measurements correctly.
This means you need to learn from someone who knows how to do it correctly.

I like to know what the head gasket actually has for volume when it is compressed.

I have a custom made tool, (my design) that allows me to install the valves, install the head gasket, and install a 2" thick bullet-proof piece of plastic that will let me torque the fasteners to a typical head torque.

Then I turn the head sideways and fill the chamber/head gasket thru special inlet/outlet passages in the plastic. I can do all 4 chambers without ever moving the head or changing the set-up of the plastic.

NOW I know the actual cubic centimeter volume for the head and gasket.

I measure the volume in the valve reliefs and measure how far down in the hole each piston is and do the math for that volume (as I also know the Bore Dimension).

Maybe a bit of overkill vs a normal thin plastic plate and some grease and colored water but in both cases a lot better vs assuming the ccs of a given head.

Tom V.