Here is a link about it:
http://www.venom-performance.com/nf/...ail.htm#avail3
You can even read the manual online.
The concept of operation is as follows:
1 - When the system is energized, it will spray only at WOT.
2 - When it sprays, the VCN-1000 computer constantly monitors your a/f.
3 - The computer adds fuel by pulsing each injector to drive the a/f intot he correct range. All of this happens instantaneously.
4 - If the a/f stays too lean for any length of time, the nitrous gets shutdown and can not be re-energized until the car is re-started and the system we booted.
No matter what your bottle pressure, the system only adds the amount of fuel that is needed based on a/f. Kit comes with four different nozzles which are about a 25, 50,75, and 100 shot.
I bought it from Boro Performance. Their phone number is 1-888-974-2133. It is pretty easy to install and you get practically everything you need. I am still orking on getting the bottle installed the way I wat it. The hardest part is laying it allout and trying to do it neatly.