Yeah, I have a spread sheet program I worked up years ago with all kinds of math for engine work, including doing compression ratio. All you do is plug in the numbers corresponding to whatever you are working on and it spits out the result. Handy.

I might try some nitro in mine. Sure would like to raise that compression ratio though. I don't know what the deck height is in the engine, but last night I was "day dreaming" about making some offset bushings to press into the piston to raise it up in the cylinder to close up the deck height and increase the compression. Do you know of any websites that have a blow up, (diagram) of the engine?

When we speak of nitro, it is nitromethane. Cars, boats, and planes that run on glow fuel are often called "nitro" though, as most model fuels have a percentage of nitromethane in them.