god theres so many myths on nitrous, i myself had Nos brand kit #5122 dry manifold set up.

the kit only sprays at wot via a microswith on the throttle. the zex kit works the same except it sprays when it detects 5 volts aka wot/open loop mode. (i think its 5 volts cant remember off the top of my head)

anyhow what ever kit you go with id highly reccomend an "rpm activated window switch"
(from msd or autometer)

this is what i had on mine,it would supply voltage @ 3000 and shut off voltage @ 7400 just in case i misshifted or hit the rev-limiter by accident. i must have refilled my bottle 10x one year until i got tired of it and sold it. my leak down and compression tests are all very good.

if i was to squeeze again, id go with the zex kit. very very easy to install (3 hrs) and nearly fool proof.

 

10 times in one year. I wish i had your self control. I fill my bottle one to two times a week for the first year. Hi, my name is James, and I am a nitrous junkie.