Originally Posted by
ram3500-RCU
You sir, are much more ambitious than I am. I tip my hat to you. I have always been under the impression that a 2-stoke engine benefits more in rpm from tuning than a 4-stroke, as the Moki is. This engine has excess capabilities for the type aircraft I use them in anyway. 18 inch pitch really hauls the mail even at 4800. Bad things happen when these rev too high.
I have a 32" three blade solo prop at about 18-19" pitch. It takes some 4300rpm on the ground which is the same than my 32x20" Menz. Also I've seen the soloprop to unload to 6500rpm in a shallow dive and at level flight close to 6000rpm. I have not tried the solo prop with the non-tuned heads so I don't know if there would be any differences. But I do find it strange not seeing any differences with higher fuel consumption...