On Friday i got a Duratrax Raze and i put ofna servos in it and yesterday the same thing happened to me. I would go to full throttle and it would stay there for a few seconds. I put the stock Duratrax servos back in and i havent tried it yet. I am scared for it to stay at wide open for to long because it is a new engine and i would hate to blow it up.
My rigs: Warhead Evo, Nitro Evader ST, Evader ST and a Raze