Your correct when you say we only run for a sort period of time while competing, but when we have the car for practices or testing etc stopping every few minutes and letting the car cool down means a large loss in time.
So ideally we want something than can sustain large amounts of abuse for as long as possible.
which leads me onto thinking running 500hp from a sc will prob mean its running slightly out of its comfort zone. Where as tt, although runs hotter may be slightly more reliable.
Sorry for all the babbling and thanks for all the imput were trying to weigh up what would be best. The car will hopefully be built ready for the 2009 season and for the moment were just trying to research and ponder over the many different avenues we can go down to give us an edge.