Sorry...UFC fight last night. Decided to get hammered.
Anway...a 50-75 dry shot won't hurt the car done right. Some people spray across the MAF with a cheapo kit. A 50 shot SHOULD be fine when its that small. The other type of kit gives applies pressure to the fuel pressure regulator to bump fuel pressure up at the injector to compensate for added oxygen coming in now. You can probably get away with spraying across the maf though just fine with that small of a shot. Just make sure if you hear ANY signs of detonation, you lift!