oooh this talk of nitrous is veeeeeeery interesting, is there much danger to your manifold and floorpan?
lulz, jokes aside what system have you gone for, whats generally the best choice in terms of nitrous shot type, size and costs involved etc etc.
I have a Wizards of nos streetblaster 150i kit, with the TPS upgrade, 11lbs bottle and pressure gauge upgrade.
do not even entertain a dry shot, its a waste of time money and power
50hp is a nice safe shot, ive got mine jetted to a 50 nitrous and 110 fuel giving a ratio of 2.2:1 to richen it up and make it safer, this gains a PEAK 40hp and 75ftlbs of torque.
costs... budget a grand for the kit, 1500 if you need it fitted for you. and £75 every time you need to fill up the bottle.
its not cheap gains, but its fun.