I want to put a safety cut out switch for the electric fuel pump on my race only car in case I get upside down (god forbid) and have read somewhere that you can put a oil pressure switch in the circuit.Anyone have a wiring diagram for this ? Thanks in advance PS Solving this will get me one step closer to running the Thames at the THAW lol !
The switch I used is Carquest #ECC53-33829. This is a 3 wire switch, with a NC, normally closed side & a NO, normally open side. The NC side has a wire from the starter solenoid " start " terminal, The NO side wire is + 12volts when the key is on. The 3rd wire goes to the electric pump. The NC circuit supplies 12 volts to the pump when starting, the NO circuit supplies 12 volts to the pump when the ignition is on and there is oil pressure, I believe 12-15 # or more. Hope this helps. Bob
The switch I used is Carquest #ECC53-33829. This is a 3 wire switch, with a NC, normally closed side & a NO, normally open side. The NC side has a wire from the starter solenoid " start " terminal, The NO side wire is + 12volts when the key is on. The 3rd wire goes to the electric pump. The NC circuit supplies 12 volts to the pump when starting, the NO circuit supplies 12 volts to the pump when the ignition is on and there is oil pressure, I believe 12-15 # or more. Hope this helps. Bob Hey Bob Are you sure of that # I'm not finding it on the carquest site,do you know what it is off ?
You want a Hobb's pressure switch...available in various "switching" pressures. Some even have a rubber plug on top that has an adjustment underneath. Can be found at many autoparts stores....provided the guy behind the counter has a clue.... http://content.honeywell.com/sensing/hss/hobbscorp/P3_6.pdf If ya can't find one for some reason, PM me.....I've got a few layin' around....
RebelRat; Upside, down? You? The Thames? I understand your concern. ASk yourself, can you crawl out of the window upside down on fire with your helmet on? THis is a question many should ask themselves when chopping the top on their ride. I asked myself that question after the fact and didn't like my answer after the chop factor. Most inboard boats use the pressure switch configuration to kill the fuel pump. Excellent idea. If you don't locate one let me know, I have some. H Rat
http://www.jalopyjournal.com/forum/showthread.php?t=433245&page=10 look at post #194 for schematic. Looking at the engine on the drawing it's on the lower right side. Also, look here http://www.holley.com/data/Products/Technical/199R9680-1rev.pdf. Good Luck
As stated Vega used them, the part number you need is: NAPA Echlin #OP6610 Standard #PS133 Delco #PS9
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