hey guys i have anew P5 i just broke in it has about 1/2 gallon or less breakin was great i run it in my losi 2.0 i use a re11 exaust and a stock hot bodies clutch its new plastic shoes no binding new clutch bearings i am wondering in 40-50 degree weather why does it stall the engine seams to only stall after a high speed pass as its falling off the rpms could the clutch be to soft? i run the stock plug c6 should i go hotter? help please ive been doing this awile never seen this?