Pe, did you find the recommended time area figures to work with glow or diesel engines of small size? I'll be making a diesel from some OPS .45 marine engine parts I have and was going to borrow porting figures from the Irvine 40D. I haven't decided what I'm going to use for timing yet, my notes are on another computer, but I recall 140° Exhaust, and maybe 10° blowdown is what I came up with from other diesels. I planned on reducing port area little from the glow version. I may end up with a new rotor disc as it would be over aggressive for diesel RPM.

I always wonder what airplane guys mean when they say an engine has good "low end" power.

Greg