with a fpss do you still use a wide open throttle switch

[tim haynes]

and what is a window switch.

[slacker69]

Yes u do. The WOT switch still an activation. It goes activation switch to WOT switch to FPSS and that then completes the circuit and u begin to spray.

[12secondv6]

Have you tried a search?
FPSS= fuel pressure safety switch
If the fuel pressure is met then this will allow the nitrous to flow due to the pressure allowing the electrical curcuit to be complete
WOT switch= wide open throttle switch
Once the throttle body blade is completely open it will hit the toggle portion of the WOT switch and this will allow the circuit to be met and nitrous can flow.
Window switch= this is something that allows the nitrous to flow within a predetermined rpm range (or window). You chose the start and stop rpm limit's via rpm 'pills'