So you stuck a cork in the intake (the unpowered leaf blower - you did say it's a major PITA to remove), dyno'd it with it off, then turned it on and picked up power? Big surprise. And your friend/SOTP test... same thing. You put a restriction in the intake tube, car was slower. You turned on the leaf blower and it was faster. Wow! And if you tell me the leaf blower flows air just like stock when it's turned off, I'll tell you to prove it, because I guarantee you're wrong.
You could have saved $200, stuck your pecker in the intake tube, dyno'd it, removed your pecker, and picked up 10 hp. Then everyone would put their peckers in the intake tube to pick up 10 hp.
Why the hell am I even posting here??? I'll go away for another few years.