I have a couple questions. First off what all does the relay do? Second how do I hook the switch and solenoids to it? Third and final, does it make any differnece in performance?

Thanks in advance..

 

ttt

 

If the nitrous relay is hooked up, why does it click the solenoids when the car is turned over.. And every time you start the car, if there is nitrous in the line, it will spray it in, as long as its turning over, till its started..