Rendegade, maybe you missed my post - I'm using 20% nitro with 20% synthetic oil, and have put new bearings in the engine, but I still cant get it to run properly. I'm not using a fullblown tuned pipe as it wont fit my plane. I'm using a throttle pipe instead, from Weston UK.
The plane is an Elation 140 desinged by Steve Dunning of Elation Models in England. All-up weight is 10.25 lbs dry.
I will keep trying.
Thanks everyone
Chris