hey guys. im having a hell of a time trying to find what i need. hopefully someone can help. im actually building a water/meth injection system on my n/a truck. im trying to find an adjustable vacuum switch so when i get into it some, say 1/4 throttle down to 5"Hg vacuum then the switch will close, and then to a relay that opens my injection solenoid. i saw that snow performance had a switch #81016 but everywhere i try to buy from say its been discontinued. any ideas???? thanks guys.

 

Out of curiosity... Why are you wanting to spray water on an NA engine?

 

well right now its ***** and giggles to see if a can get anything out of it and maybe better mileage. not expecting much right now. but really im doing it to prep it for when i finish building my manifold for a magnuson 90 that im going to install with out a cooler so the water/meth will help with that. but i would like to run the meth n/a for a little while to see what if it makes a difference so i can help other if they decide to do it or not. but i cant find a vacuum switch for it. any help would be great.

 

would a typical window switch not work? on at x rpm, off at x rpm...

 

yeah i could use a window switch and have it only spray off of engine rpms. but i was hoping to use a vacuum source so it senses load conditions. i cant believe its being this much of a pain to fiund one. i figured all the companies would sell them for old school carbureted high compression n/a guys.

 

window switch is basically the same thing, load=rpm... if you wanted to go as far as to figure out what vaccum it pulled at specific rpm it wouldn't be that hard to do.

 

true i suppose it wouldn't be the end of the world to use a window switch haha. would to a lot easier to find. now im thinking either a window switch or tps switch.