what is the difference between a wet and a dry nos kit and wich would be better on a turbo charged 2.4L

Wet is always better

Wet N2O is introduced into the engine along with fuel being sprayed in at the same time. Dry N2O is sprayed into the intake air system and a pressure is used to make your stock injectors push more fuel. From what I have read and understand, wet is better than dry on forced induction engines. Hope this helps. I have a dry shot and I am ordering a wet upgrade so I can put it on my SS/SC.

aye. wet sprays fuel with it, dry relies on your injectors for the extra fuel.

Dry also requires a MAF equipped engine. Dry spray nitrous on the MAF and the computer reads more air entering the engine so it in turn adds more fuel.

As long as the injectors can keep up with the extra nitrous dry is still a safe option. I think it requires a bit more attention during the tuning phase.