Question: I turned my blower overdrive up. Why does my boost gage read higher boost for my blower size and overdrive than many of my competitors?
Answer: An increase in boost reading from higher blower speeds over another car with the same blower speed is not necessarily an indication of more air. It may be from more heating, and it may also be boost backing up behind the intake port or valve from approaching a sonic speed limit. Slowing down the blower may produce a lower boost reading but not necessarily a slower car. What happens through that blower is a lot of flow disorder. Mostly trial and error. Probably all you can do is try it and see. It may go in one direction for you and another direction for another car. At really high overdrives, it may be unpredictable from one car to another. More info in 5000 Horsepower on Methanol.