I forgot to mention that I live in Utah and the average altitude is like 4327 feet....

Given that the "standard" "loss" for power is 3% per 1k feet, that gives me about a 12% "loss" in engine power....

.12x givin bhp of engine will give you my approximated hp rating.

I already figured it out for the .46ax to 1.44nhp and 1.06 for the .46la

so, if I were to get a 40 size engine, it will be underpowered for my application in SLC