I hate to ask the stupid questions like this, ive read alot but im trying to just get a real answer from somebody, I want to spray my car and I have a few questions because I honestly dont know anything about nitrous
-mods are in my sig, plus 36lb injectors and walbro255, what should I safely spray,..im thinking 125??
-is there some type of switch that activates the nitrous and a certain rpm, or throttle position so I dont have to push any buttons
-do I have to get a new tune?
-everyone says the kit is about 500, but with the supporting items to do it right, its about a grand, so what extra things should I buy?
-I read NX and TNT are the best systems, any preference between the two?

thank you very very much for any help, I really appreciate it,
Chris

 

You would be pushing the stock bottom end with a 125-shot on top of an engine that is already making HP well into the mid-400's.
You set it up so the system can't activate unless you have switched the "master" arm switch to "on". Then you include a "window switch" that sets the low RPM level below which the system can not activate, and the high rpm level where you want to cut the system off. Then you include a "WOT swich" that only allows the system to function when you foot is on the floor.
No. You optimize your tune for running without nitrous. You use the nitrous jetting to control the A/F ratio when you spray, use an external box to retard timing as required.
Window switch, timing retard box, fuel pressure safety switch, nitrous pressure gauge, bottle heater, and an external ignition box to strengthen the spark and provide a rev limiter that cuts spark, not fuel like the stock PCM. Add a purge system if you are bracket racing and need consistancy. If installing the bottle in the hatch area or passenger compartment, add a blowdown tube. I would also consider a fuel pressure gauge.
I wouldn't rule out NOS... I still use parts that came with my NOS dry kit when I bought it in 1994.