The Brumos team were running 500HP+ with the 3.6L motor. The motor isn't restricted by air restrictors only Rev limit(9K). The problem is the little Flat six doesnt have the torque of the V8s it competes against. I hope the 3.8L can push the DP cars to the front. Mr Piech said back in the 60s, "Torque wins races". I think developing the 4.5L V8 would be a better route. Time will tell.