i have a nx wet kit and have ran about 2 bottles on my 305 with 75 and 150 shots. everything was fine. long story short the car was suppodly sold i removed the nitrous guy backed out i put the nitrous back in. same way it was before. running a wot switch that actullay comes on about 3/4 throttle when i hit the swtich if i stay at 3/4 throttle the car pull like crazy but as soon as i go wot it just bogs ive traced everything, vacum leaks, bumped fuel pressure, closed spark plug gap i just cant figure it out. also switched to 50 jets but no differance

 

My guess is its a bad snap swith, when you go to WOT it may be causing the contact in the switch to slip off to the side or flex past the point where it acutally makes contact. Have you cheked to make sure you power to both your solinoids with the snap swith pressed all the way with your throttle?

 

ill look in to the swtich, but the problem is once i get to wot the motor bogs and wont take the nitrous, but at 3/4 throttle it loves the juice and runs fine. otherwise i have pulled my lines off the intake and "purged" nitrous and fuel to make sure they were spraying

 

Mine bogged like crazy when there was too much fuel pressure. Maybe try backing it off a little. 6.5 psi would make the car nose over but 5.5 psi it picks up. Trying out 5 psi next time I get the chance. Not sure what kit your using so it may be different.