homemade aircompressor

also found this thread. Its tractor driven though. I want to use an electric motor to drive mine for noise reasons.

This guys just lightens off the intake valves so that they open when the piston comes down (vacumn) and push the air from the spark plug holes. He does say though that it doesent push out huge volumes as the valves bounce around at high rpms.

Driving it from the gearbox is differnt though. he gets the options of gears to run at the right speed, although correct selection pullys is possibly a better option since you dont want to change the setup once its done.