Cessna 120-140 Association

I’m based in Arizona and flew my plane here for many years with the original C-85/cruise prop and then re-pitched to a climb prop for a while. I now have the 0-200 crank conversion swinging a Sensenich 76AK-2-44 prop. When I changed to a climb prop on the C-85 my “take-off pucker factor” was reduced but this benefit was offset by the 4-5 mph reduction in cruise speed. The current configuration is very good with double the original climb rate, a nice increase in cruise speed, and a modest 0.2 gallon/hour increase in fuel consumption. I would however say that no engine/prop modifications will overcome a heavy 120/140 when operated at high density altitudes. I suggest reducing the weight of your plane as much as possible when mountain flying in Arizona.