the more air that the blower moves, the more hp it takes to spin it!
so it may take 3hp to spin it at idle when its boosting less than 1psi, but may take 25 hp to spin it when its boosting 15psi, thus making alot more power than it uses!
Russell
Oval Port 3L Nearly Done
MTX75 w/ Homebrew Zetec FD and Torsen Complete