Do the fuel injector play any part in a wet kit? Or does the fuel solenoid completly take over when spraying?

 

No your injectors do not play any part on a wet kit, the injectors are still working but the extra fuel needed to componsate for the nitrous is injected by way of the fuel soleniod with the wet kits, you'll just need to check your a/f ratio to make sure you have it jetted right ( not running to lean or rich ).
I'm no nitrous expert, so maybe somebody will correct me if I'm wrong.

 

Nope nostya you got it basically correct. Fuel injectors merely supply the engines naturally aspirated fueling. One thing you want to watch for is fuel starvation, wet kits tapped off the rail tend to suck the fuel from the injectors, without having a rail mount regulator, end result watch cyl #5 and 7. GL

Charlie

 

Where and how much is a fuel regulator and do i need an entire new rail?