View Single Post
Old 04-21-2006, 12:14 PM   #10
ucbsti
Scooby Specialist
 
Member#: 88105
Join Date: May 2005
Vehicle:
2005 STi
CGM, 2006 GG IX

Default

I think failsafes should never be singlepoint

I'd have two failsafes on my unit, I think I'd try something like this.

1. Loss of power. A simple relay could solve this problem. Have the relay only powered when in boost ranges where you will be spraying (pressure switch), when you are in boost, power SHOULD be going to the pump. If its not, have the relay send a audio/visual signal or cut fuel/boost

2. A dual pressure switch for the conditions of no flow or clogged nozzle. There are many pressure switches (digital) out there that have dual output, so you can have 2 pressure setpoints. Once again, id have the relay required for this be boost activated as well, so the pressure switch isnt sending out signals when you arent even in boost and not using meth/water

Materials needed
2 pressure switches-1 single setpoint for boost, one dual set point
Automotive relays, 2 if you dont care to know if its low flow or clogged nozzle, 3 if you do.
some wires/solder/etc
some electrical know-how
* Registered users of the site do not see these ads.
ucbsti is offline   Reply With Quote