I have a couple of Gas/Glow engines that I want to play with.
One is a 32cc Mac.

I want to raise the compression, how much is enough?
Can I simply put a piece of clay in the head, turn the engine over and measure the flattened clay
subtract .020 and take the rest off the bottom of the cylinder and then raise the ports the same amount?

Will this simply tell me how much raising the compression helped or hurt?
Then I could raise the ports to a predetermined degree and call it good?

If I took .020 off the cylinder couldn't I bevel the piston to regain the port timing?
Could I bevel the piston and not raise the compression and gain much?

Would I be better off playing with the port timing instead of the compression?

Inquiring minds want to know.