Even on a run in engine, every time I put the Truggy out for every Qually etc I still do a a warm up lap of just short bursts of throttle durring the first warm up lap before I start to build up speed to normal race pace, I see so many guys start the car and rev it on the box (a big no no) then put it on the track and get straight into it at race pace (another no no), then wonder why the rod pops. So imagine the strain on a newer engine with less fuel throu it.