Just to follow up, on what Greg says, all of the Venom Kits are Dry kits that are computer controlled Just that the VCN-2000 you have so much more control of when you nitrous activates. I am a direct distributer of these product and deal with them evey day, though i do not know much about other nitrous kits and the proper way of install, i can tell you that from all of my customers that i ahve sold these kits too, they have had no problems with damageing there engines.
As greg has stated many times before, the computer control moduel does everything a reprogramed ECU would do...Now i am not saying tunning is not nessacary, because it is still very nessicay to get the most performance, but with the VCN kits they come ready out of the box to use safely. In my opinion there are expensive, but great beginner systems for thoes who don;t know much, or have the money to tune there cars properly.
The VCN's are designed to shut off nitrous flow if the car begins to run lean. ANd you have a digital display to show all of the nned information.
But back on topic, personaly, modifying any nitrous system (IE: turning a wet kit to direct port dry kit) is dangerous and should only be left to perfesional tuners and manufatures in my opinion. As to why I will get that information form my Venom rep and post again.
Roz