Well, ran my GTR at the first UK Truggy Nationals round this past weekend... in 140 ,minutes of running including a solid hour of finals not one hicup from the motor. My only issue was a glow plug coming lose costing me a bump-up on the second day, but that's user error Tune was easy, and didn't need touching all weekend once set.

The motor was running 30% Byrons Gen 2, P3 plug, extra shim and JP4 pipe and header. I ran the 9mm venturi. Truggy was an 8ight T 2.0, stock clutch, non-lightened drive train, but really good bearings fitted.

The motor started the weekend with about 3/4 of a gallon on it but was producing really good power, bottom end was fine for short run up jumps and the truck had really good top end on a big, wide open track. Traction was quite low and the power delivery was very smooth which helped get consistent laps and also run time (no spinning up the wheels). Fuel economy was excellent, I could pity at 10-11:30 easily with some fuel left in the tank as a safety margin. We never tried but I think I might have been able to get close to 15 minutes by rolling the throttle a bit more... to me it's not worth the risk of trying.

In short, I'm loving this motor and it was attracting a lot of attention over the course of the weekend.