the problem starts showing up within about 3-5 mins after starting both engines, and usally when going to full throttle (while holding on the ground as engines come up to temp.) at or near full throttle the right (always the right) dies. but this only happens if i start the left engine first. if i start the right first this does not happen. and i do tune each engine by themselves before firing both engines. i have also noticed that when tuning each engine i will end up with just over 10,500 rpm, with both running only about 9400 rpm is possible. these are .61s on a nitro 100 inch p-38