Whats the diff in the N2O setups?

OK I know there are dry shots, wet shots, and direct port. I know direct port hooks up to the block some how. My question is what is the diff between dry and wet shots? Why is direct port more eff? I am doing a rebuild on a motor and building it for turbo. I want Nitrous for that extra kick when I need it. Which setup would you suggest?

Check out the FAQ in the integra forum I have listed alot of helpful info about N20 there. :bigthumb:

A dry nitrous kit only injects nitrous and usually relies on increased fuel pressure to add more fuel, dry kits are usually a single nozzle kit only.

A wet nitrous kit injects nitrous and fuel, and it can be injected from a single nozzle, a nitrous plate with spray bars, or a direct port kit.

A direct port nitrous kit is the most effective and safest kit to use because you get an equal amount of nitrous to all cylinders so you do not have to worry about melting a piston that gets a lot more nitrous than others, and a nitrous backfire isn't as bit of an issue because it is nearly impossible for the fuel to puddle in the intake.