Jim if it makes you feel any better I had the oil really hot (217 F) and the air in the cell was just right and a peak of 421 hp 457tq was recorded but I don't consider that good information, it only happened the one time. If we take off the electric waterpump I can be confident it would register 410 hp or better every time but I like the 415 hp number better--if you say it in a fast mumble it kinda sounds like 450 hp--lol. J.Rob