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oil pressure safety switch for use with electronic fuel pump
 evilsim  2012/1/23 7:18  Tell a friend
 6964  3  0.00 (0 votes)
so basically this came about as I wanted to only have my fuelpump (electronic mounted near the fuel tank) pumping, when the motor has oil pressure. This then arises the question, what if the car has not started in months and the fuel lines are dry, so I implemented a primer switch to prime the carbs before actually turning over the motor.
It uses 3 relays, but you could simplify my diagram my removing the 'oil psi safety switch relay' and wiring 87 on the primer relay onto 86 on the fuel pump relay. I just like relays and somehow ended up using 3 of them.. in rerospect, 2 relays would work fine. |
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| Andrew73 |
Posted: 2015/6/30 9:13 Updated: 2015/6/30 9:13 |
Just popping in  Joined: 2013/6/10 From: Sydney, Australia Posts: 9 |
 Re: oil pressure safety switch for use with electronic fu... On our race car we use a Peel LPG safety switch P/N CP30 to power the fuel pump.
Uses ignition pulse signal to activate, not oil pressure.
Then have another momentary switch to activate it for priming, works well.
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| ddgonzal |
Posted: 2015/6/30 2:17 Updated: 2015/6/30 2:17 |
Moderator   Joined: 2001/5/3 From: Kent, WA Posts: 31751 Online! |
Re: oil pressure safety switch for use with electronic fu... Very similar to Datsun factory electric fuel pump wiring. See Fuel Pump Relay Circuit |
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| evilsim |
Posted: 2012/1/23 9:24 Updated: 2012/1/23 9:24 |
Home away from home   Joined: 2003/11/30 From: Sydney.au Posts: 597 |
Re: oil pressure safety switch for use with electronic fu... |
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