Rx7 fc

Has anyone re routed the air pump to the intake?

Seriously this seems like such an easy thing for a poor man's supercharger.

scathcart

Won’t work.
In order to achieve positive manifold pressure, you have to have a closed vessel from the compressor to the combustion chamber.
To achieve this, you would have to route all of the engine air through the air pump, and it doesn’t move near enough air.... you’d be going from a ~3” intake to a 1” intake. I doubt the engine would even run.

scathcart

If you wanted to try to use the air pump to increase power.... you *might* try plumbing it into the pcv system and using it to create crankcase vacuum. It’s often used on racing engines to promote combustion chamber sealing.

i have never tried it. I would need to do some air flow testing on the vacuum pump with varying rpms, as well as checking PCV generated under multiple rpms and loads and log it all... and success would even be dependent on condition of the motor. But its an idea.

Rx7 fc

Super interesting, I didn't know vaccum could be so useful.

I was imagining just plumbing it into the intake to kinda dump extra air into the intake.. Which you could also do with the vacuumed pcv.. Now I'm going to get crazy with this thing this summer as a project if I run out of car projects lol.

scathcart

The problem with what you’re suggestion is that the air is being drawn into the engine. The reason turbochargers and superchargers work is their compressors are placed in series with the intake track, and what you’re suggesting is parallel; any air that was placed into the intake track by the air pump would just replace some of the air being drawn in- not add air to the intake charge.

professionalpyroman

That pump has the capacity to low pressure supercharge a small Briggs and Stratton... Not a viable long term solution. It only works about 3 times...

WondrousBread

I recall reading that someplace (maybe it was the snowblower forum?) that people were supercharging snowblowers using 80's air pumps. Always something I've wanted to try, I just need a guinea pig snowblower.

Either way, it won't flow nearly enough on a car engine