Nick, it appears there is nothing automotive related that we disagree on, I thought mechanical secondaries was your choice. I have run the 355 on both an engine dyno and chassis dyno, so I know my parasitic losses. Because of my Jag IRS and meatball rear tires I'm a bit over 17%. The chassis dyno will be at the T-bucket Nationals this year in Carson City at 5000' elevation. I'm expecting my 526 hp at the crank at sea level to translate to 410~425 hp on the rollers at 5000'. I've run on this dyno before and it is a bit stingy on numbers.