My engines lost anywhere from 600 to 1000 rpm's between sea level in Puerto Penasco and here. All my full size aircraft performance charts show that an engine loses about 5% power per thousand foot altitude increase, as well as the dyno correction charts I've accessed. This has also been my experience in various planes, boats, race cars, models, etc.

Anyway, I don't much trust this Glo-Bee tach, though it should be ok for direct comparisons I guess. It reads 400 rpm's lower than the electronic tach on my ultralight training airplane. I didn't think to check it against my old Ace R/C analog tach. The Glo-Bee is a pain as the numbers change depending on where and how you hold it. You have to use the number you think is correct out of the different readings you get. 8200 seemed to be the steadiest and most consistent reading I got today, so I reported that. A new TNC tach is definitely on the top of my wish list. Santa???

At any rate, the little Kioritz is definitely more powerful than the Homey, and weighs a half pound less, so I guess I answered my original question of "Kioritz vs. Homey".

Take care,
AV8TOR