I took my miata to get tuned on C16 fuel this morning. We turned it up from 12 pounds where it made 315. The clutch started slipping at 400 ft pounds of tourque, so I dont have exact power numbers yet, but Im guessing it made about 450-500 hp. We still have tons of boost to give it. I think we will end up making about 550 after new clutch install. Then Its time for some low ten sec. passes.