what the real question should be here is what do you want to do with the car? drift,drag,autoX? Im sure you have somthing in mind for the use of the car, there's no point in building a engine that has no end goal.
there is a TON of thing's we can fill you in on depending what your doing with it, but as far as adding spray's or or anything of that nature unless you spraying N2O there's no real point to it. but lay down for us what is your end goal with the car NOT HP but driving wise what are you going to us it for?