Zero issue with siphoning when nozzle is mounted above the feed tank. Below the tank, I have read there can be issues. Worst case, install a selenoid. Also part throttle wont apply 20 inches vacuum, plus the turbo is pushing air. Hence why I say its a non issue.
Dunno bout the drip issue. Usually air is flowing past the nozzle, so I can see the possibility only after racing the car and slamming the throttle blade closed. I have never tested the effects of hitting a MAF meter with some alky.
Another solution is eliminate the MAF and go to a Felpro
