Ok, leaf blower may work, well suppose I got a nozzle attachment that got steadily smaller and smaller in diameter to create pressure, then introduce it to the engine at the end? But I'm used to 20psi boost on my Stage 2 SAAB, so I guess .5psi won't be worth much, what about if I got an air compressor (for tires and such) then charged it up in the back seat (loud as hell, but effective) and had the little line run to the engine, now that would be more beneficial right?
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Originally Posted by curtis73
Do a general internet search for things like "leaf blower turbo" or "shop vac supercharger" and you'll get tons of results.
It won't work. Shop vacs make vacuum and flow, not pressure. That "pressure" you feel on your hand when it blows on it is simply flow. As you put your hand closer and closer to the nozzle, there is less and less force on your hand, until you finally cap the nozzle and almost all pressure stops since you have halted the flow.
Don't confuse force with pressure. Force from flow won't help. You need to actually compress the air. Tests have been done a few thousand times. Even the biggest leaf blower or shop vac only makes about 1/2 psi... which does help power on a theoretical level. There was a youtube video showing a civic on a leaf blower and it gained like 3 hp.
But, there is no free lunch. If you want to make that power with a shop vac, you have to have a 120v generator that is capable of about 15 amps. That is the equivalent of adding an 1800-watt amplifier to your stereo. It takes HP to spin a generator... more than you get back with the shop vac. First law of thermodynamics can't be violated. You can't get back more than you use.
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