Put this one back on the bench for a couple more runs .
Os 8h carb (heli version of the 86 pumper carb)
Pump to match
macs 1260 old style pipe
header cut to approx 5.5"
enya #3
5% / 18% synthetic
apc 12x8
11k2 steady
pipe length was optimal.
might try another run with a couple of different plugs at some stage but I don't imagine there is many more rpm to find
The standard sf engine seems much happier on this prop vs the 12x10
excellent throttling as always from the pump carbs
very sensitive low speed needle, very reluctant to start to begin with until that was dialed in about half right, but instant starts every time after settings were established.
Last edited by SuperNash; 05-02-2017 at 08:35 AM.