Car people of Reddit who post questions about unrealistic car mods (too expensive/time consuming, special tools + lot of experience required), have any of you ever successfully completed your project?

The reason this doesn't work (or requires 8 blowers in series to barely work) is because blowers have fan/pump curves. They will put out a range of CFMs, but for each CFM they'll only put out a certain psi, and for something like a leaf blower, none of those psis are very high.

If you try to force it to run at high psi (like have it pushing against your closed throttle), the CFMs will drop down to nothing. Open up the throttle and let the blower flow and the psi will drop to nothing. As the engine speeds up, even a smaller 4 cylinder is going to be sucking in way more air than a leaf blower can handle, and the blower is actually restricting high rpm air flow into your intake.

You might be able to use a leaf blower as a supercharger on a small motor. A 4 stroke 50cc at 8000 rpm is (googles conversions) 7 cfm. That's actually doable. A 250cc bike at 12,000 rpm is 52 CFM. That's not horrible. I don't think that you'd hit positive boost pressures on a 250cc bike, but the leaf blower shouldn't be obstructing air flow, even near the bike's red line.

/r/cars Thread Parent