Why don't you need a window switch? What about a WOT switch? Blowdown tube? Are you going to have the car tuned for it?

 

cars already tuned for it, and i dont need a WOT switch or window switch, i am doing it so it is push-button activated where i have to hold the switch for it to spray, so as long as i let off the button a little early, no problem.

 

Thats the way I would do it. Work it when you want it. PERIOD .

 

I'd still get a window switch. I really don't think you want to accidentally hit the rev limiter while you're holding the button down.