well thanks for the reply, I am by no means saying anything is junk-i have little experience with nitro and at first it ran fine-well any way i switched fuel and plugs and the engine ran great today-in my own opinion it made good power-that is until i ran head long into a tree and broke the right front lower suspension arm-on order-CEN please ship fast cuz this thing ran great today and i had a great time running it-now as far as fuel goes i was runnin traxxas 33%-not knocking their fuel-just didnt seem to work for me-swithed to mc59 plugs and trinity 20% monster blend and it ran great-u guys probably think what an ameture-but none the less it worked for me-just my 2 cents