engine 15%nitro

[hirobo]

Which the best engine 50 for using fuel 15% nitro??

[wtr]

i run my hyper on 15%.
Works like it should

[markelly]

I am using 10% on my Hyper and that has loads of power.

[frankg11]

I am running 15% in my OS 50 with a Muscle Pipe II. Plenty of power. Make sure you are running the 50 in the middle to high end of the power band though. My 50 doesn't like running too slow.