Ummmmm.....where to begin........
Spraying through the mass air meter??===asking for trouble,NO KITS DO THIS FOR A VERY GOOD REASON
"bigger flowing heads less hit from nitro" ???? I THINK you're trying to say that pi heads will give him less power when using the
NITROUS
Simply not true.
NITROUS adds power by adding more air and fuel. As long as all the
NITROUS and fuel get to the chamber,any kit will add the same amount of power to any existing engine. (other factors change the gain but it's a mathmatical thing)
"had one backfire but i out ran it through the shift"
What you had was technically a backfire caused by spraying
NITROUS through your mass air meter and loading the car with too much fuel. You did not "out run" it. "it" travels about the speed of a low caliber bullet. The type of backfire to worry about is the kind that travels BACK throug the intake manifold causing massive damage.
I have used the NX wet kit for 3 years now. Sprayed 150 probably 25 times and 100 many many times. 175-once so far. A rpm window switch is a must. I have mine running from 2900-5900 rpm. Too low and you will get a fuel puddle backfire. Too high and the factory rev limiter(which uses fuel cut off) will have you feeding your engine pure
NITROUS. A very bad thing.