ORIGINAL: jimmyjames213
i dont have a 70 4 stroke.
yes you can run a 4 stroke on 5% nitro, i have done it, it works ok. however your top end takes a hit as well as your idle.
i run my .91 on 10% because i have plenty of 10% and dont want to go buy 15% and lug two jugs around. it works, the idle isnt as great compared to ys20/20 fuel. and i loose 500 rpm on the top end. however i dont care, i bought a bigger engine so i wouldnt have to worry about fuel.
however most people here, and at my field, run 15+ nitro in 4 strokes.
Okay thank you.
I know that my friend, who has this 70 Four Stroke, complains that the plane isn't very fast and I know the plane doesn't idle well. I think I'm going to recommend him to try out 15% fuel then. Perhaps this will solve the problem.