I have my system set up with a rocker to activate my system(give power to), a momentary to purge and a WOT switch to engage the fuel and nitrous solenoids. Most people have a window switch or a momentary for this. I was thinking that in the safe rpm range I could just throw the rocker switch up to give power to the sytem and shut it back off since the pedal will be to the floor the whole time. Is that okay to do? Or should I just get a window switch?

 

A window sw will allow you to run more consistant, and safer. My buddy does it the way you describe and runs 11.4xs.
Robert

 

Get a window switch, in a race how has time to look at the tach. And if you are loosing at the start you are more likey to throw the switch on and try to make up time.
Ricky