Meh, i dont know. They said LP was the quickest to Forrest Elbow, and i dont know any different...but i do expect that a race engine to be down in power and/or not rev'd as hard as a practice-quali engine. From memory the V8s in Grp A trim had a higher rev limit, higher compression ratio limit and more cam freedoms then they later enjoyed when they moved to the control formula?!?!? (Based on memory only)