Running a dry shot on a Focus/ZX2 (or any car for that matter) is just plain nuts. There is no way to crank up the fuel pressure when you are spraying (unless you get a programmable chip, larger injectors, etc)...so basically you push the button and cross your fingers in hopes you don't blow your motor. Trust me, my buddy just took the 75-shot challenge and ended up blowing his motor all over Bithlo speedway not even a week ago.

Why not go with a wet kit? They are pretty cheap and they aren't hard to install, just weld a bung on the end of the fuel rail for the fuel supply. This is the only "safe" way to run nitrous cost effectively with our motors.