i broke in a traxxas 3.3 in the cold. i did all wrong according to the experts. i put it on the street truck tail gate. started it and let it idle, after 8 tanks it was broke in. allso i have an idea, just an idea no proof. on traxxas 3.3 the con breaks cause the rpm was held at top rpm to long, i think top rpm should not be held for more than 3-4 seconds. i formed this idea after splitting 3 con rods