i've seen a video on streetfire.net where someone used a leaf blower to increase their hp on a dyno. it worked, but you can imagine how much that leaned out the fuel mixture.

you can buy a similiar blower at a marine store or wal mart. it seems to be a pretty crappy thing to do.

cheapiness doesn't make up for real work. if you want real horsepower gains you're going to have to get dirty.