Originally posted by stevieteg
Zex is a dry kit. It sucks. My friend melted two valves with zex. Get a safer wet kit. B18c's are too expensive to just use a crappy nitrous kit. NOS or nitrous express are good. Or even better go all motor!
That's not the fault of it being a dry kit, that's either tuning or running the nitrous in succession a few too many runs. That's how you melt valves. I have been running a 75 shot dry for a long time now, no problems here, nor do anyone I know have problems with their dry kits.
Originally posted by Teg711
I was pretty sure Zex doesn't make a wet kit, go to there website, it explains the install. I believe they put the NO2 by the throttle body so it can mix with the incoming air as opposed to a wet kit which mixes with the fuel from your injectors.
This is wrong. The dry kit nozzle is tapped as far from the throttle body as possible to achieve even distribution of the nitrous with the intake charge. The added fuel comes from a raised fuel pressure, which adds fuel via the injectors. The wet single fogger kit is tapped close to the throttle body and sprays a fuel/nitrous mixture.
Wet kits are not necessarily better/safer than dry. If it is a single fogger wet kit, meaning there is one nozzle tapped in the air intake spraying fuel and nitrous, this can cause fuel to puddle in the intake manifold and ignite, causing an intake backfire. I have seen cars catch on fire from this. Sure a wet kit puts in it's own fuel, but a dry kit will add plenty of fuel via the fuel rail/injectors to make a good a/f mixture in the cylinder while spraying. With a wet kit you have the same problems with even cylinder distribution as you do with a dry kit.
The NOS plate kit will NOT work on a skunk2 intake manifold. The plate fits in between the two pieces of the stock GSR manifold, thus it won't work on the one piece skunk manifold.
Zex DOES make a wet kit now, however not a direct port kit...it is a single fogger kit.
If it was me, I would go with a NOS or NX direct port kit. They are pretty much the same thing, NX just uses bigger jets for what they call the same shot size to provide the illusion to the average joe that their kits make more horsepower. Since each intake runner will have its own nozzle, the nitrous and fuel will be distributed evenly to all cylinders. Plus if you decide to build the motor and run more nitrous, the direct port kit leaves room to go up in shot size, whereas with a dry kit or single fogger wet kit the 75 shot is pretty much the maximum before you have major distribution problems. If you never want to go above a 75 shot, I would go with a Zex dry kit for simplicity and safety.