I may be a fringe dweller but I read every thread on Everything Diesel. However, every so often I post a question. This time, tuned pipes or "magic" mufflers on diesels as against the same motor as left as a 2 stroke, on a model meant purely for speed. Will a diesel on pipe perform as against a 2 stroke on pipe? Lashed out and bought myself a 2nd ARF after 50 years of scratch building. Shame, shame, shame. This one's a MODEL TECH Mach Racer delta flying wing, weighing 3 1/2 lbs, for a .40 to .46, based loosely on the American Diamond Dust model. (goes like a cut snake) I have a spare Vmax .46 (nib), plus a new dieselized head for same. My personal opinion, not possible as I'll be reducing the size of the venturi when converting to diesel but for speed, I'll need to have a large bore as possible. Stick with the glo for this model? Pity, as I enjoy my diesels. Your thoughts, please. Glen