Is there anything stopping me from mounting a 12V. compressor on its side, or even upside down? Am building an onboard air system on a coilcab, and mounting upside down would be handy under the tray.
Depends where the Motor is in relation to the pump head(s). Most 12v compressors are oil less anyway so nothing will leak.on the side is ok. upside down is not recommended i think because all the hot air from the head helps heat up the motor above it. tho fit a good fan and it won't be a problem.