[bluetoy]

That thing always pushes 800 cfm. So if your engine is using 200 cfm then it has 600 cfm leftover. Since it is a fan and not a compressor it won't make boost with the extra air. But when your engine needs 600 cfm it still has extra air to keep positive pressure in the intake. If you think about the efficiency of the engine and intake system there will always be suction and the engine will be gasping for air. Gasping being loosely used. Basically your engine will never run at 100 % effieciency. With positive pressure it has a much better chance of filling the cylinders at high rpm.

Quote:300 CFM = 24.21lbs of air. which is about 160 WHP on the focus.. so 160WHP is your break-even point for such a blower. But since you're also forcing air in at a faster speed, you'll see the greatest kick on long intake runners.

I don't understand. It makes 800cfm not 300.

The only real drawback I see is that during normal part throttle driving you'd have a huge restriction in you air intake. WAIT!!!! Maybe it will act like the "tornado" and make you get 300 mpg!!!