I have a nx wet kit on my car. I'm spraying a 150 shot. My question is why is there such a variance in jetting size btween manufactureres. NX says for a 150 you need a 62 & 35, nos is 71 53, and compucar says 76 & 59. Do the different solenoids make the difference between the systems?

 

noids and nozzles are different. Sometimes they also run at different bottle pressures. ALWAYS use the correct jets from the manufacturer. Nos kit, use nos jets, and so on.

NX also runs their kits a little leaner than others, that's one reason why they tend to make more power.