I have never primed a turbo upon installation. Just fire it up and go. I could see some concern if it were fed from the head but, I have done plenty of 11b-16g installs with the factory feed lines and have never had a failure. And we generally clean the center sections very well in the solvent tank if it is a used turbo. YMMV but, you could do that or the transistor, coil pack, resistor pack or whatever makes you feel comfortable to spin that thing over do it wpnt fire.