oil pressure

Heres the story, my friend has a 300zx (80's) and we decided to sea-foam his car. after putting some in his gas, crank and vacuum line we had about a third of a can left. he asked me if i wanted to use the rest (otherwise it'd be thrown out) and i said sure. i read the instructions and followed...

So the OEM Oil Pressure Switch is a single wire style that closes to complete a circuit with ground. The only way it can do that is through the threads have metal to metal contact with the block. In my Rotrex install, I must move the sender out of the way of the Rotrex intake, and down to a...