when you say battery voltage do you mean like a msd box?

 

I'm definitely going to get the Racetronix injectors as soon as I can figure out what size I need. I have 380 RWP and plan on spraying a 150 shot on top of that....can you go TOO big or is it all in the programming?

 

i'm goin with the racetronics 32lb injectors and as for the nitrous I'm not messing with a bigger injectors I will just buy the zex wet system it seems to be one the safest systems out there

 

You can go too big.
If the injector size is such that the fuel delivered at the minimum stable pulse width is more than the motor needs to maintain the desired A/F under idle / light cruise conditions you end up with an overly rich condition.
Typically this is not a problem until you get into injectors that are 60lb/hr or larger. Injectors are getting faster all the time so this is becoming less of a problem allowing for very large injectors, high HP and great drivability.