Re: switched power, where to get it from
[Re: dangina]
#1760837
02/23/15 08:10 PM
02/23/15 08:10 PM
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Joined: Jan 2003
Posts: 25,992
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,992
Rio Linda, CA
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Accessory power will be on in both ACC and RUN but do you want your fuel pump to run in the ACC position?
The blue wire on the voltage regulator will be hot in the RUN position only.
The INTERNET, the MISinformation superhighway
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Re: switched power, where to get it from
[Re: John_Kunkel]
#1760838
02/23/15 08:42 PM
02/23/15 08:42 PM
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Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
D_C
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,373
Rancho Cucamonga, CA
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My electric fuel pump/relay has a Low-Oil Pressure Kill Switch wired into the circuit. The switch was relatively inexpensive and easy to install.
With this switch, the fuel pump will only run when there is positive engine oil pressure. This keeps the fuel pump from running when you have the Key in the ACCESSORY or RUN position and the engine is OFF.
I installed it as an NHRA Safety requirement particularly in case of a roll-over accident, but on one occasion, it actually saved my engine from destruction.i
I was driving down the freeway when Suddenly, the engine began to chug and then it shut off. I pulled to the side of the road and stopped.
When I investigated the cause, a pushrod had pierced a stamped-steel rocker arm and the oil pressure dropped to zero. Since I had the switch, the fuel pump shut the engine off.
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Re: switched power, where to get it from
[Re: dangina]
#1760840
02/23/15 09:05 PM
02/23/15 09:05 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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for the trigger wire to engage the relay(s) I'd just T off of the ign1 "run" blue wire circuit that goes to the alt field/reg as Kunkel said. An option for the pump would be to run this trigger wire from a fuse box terminal that is hot all the time (tap into the back side (before it goes thru the fuse) then run it out & add an inline fuse holder/20 A fuse) then an on/off switch in series with that trigger wire on to the relay for more absolute control of the pump. This lets you prefill the carb "as needed" and be able to shut the pump off directly in an emergency "as needed" with this seperate/direct switch
live every 24 hour block of time like it's your last day on earth
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Re: switched power, where to get it from
[Re: RapidRobert]
#1760841
02/23/15 11:46 PM
02/23/15 11:46 PM
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Joined: Nov 2008
Posts: 1,491
Lethbridge, AB, Canada
dangina
OP
pro stock
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OP
pro stock
Joined: Nov 2008
Posts: 1,491
Lethbridge, AB, Canada
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Quote:
for the trigger wire to engage the relay(s) I'd just T off of the ign1 "run" blue wire circuit that goes to the alt field/reg as Kunkel said. An option for the pump would be to run this trigger wire from a fuse box terminal that is hot all the time (tap into the back side (before it goes thru the fuse) then run it out & add an inline fuse holder/20 A fuse) then an on/off switch in series with that trigger wire on to the relay for more absolute control of the pump. This lets you prefill the carb "as needed" and be able to shut the pump off directly in an emergency "as needed" with this seperate/direct switch
I bought a electronic fuel pump controler where it senses a signal on the coil wire from the tach so it doesnt keep running if the engine dies, but it does need a switch power to turn on the relay which sends power to the fuel pump. See it here:
http://www.revolutionelectronics.com/Fuel_Pump.html
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