wire fuel pump with relay, carburetor engine
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Joined: Apr 2018
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wire fuel pump with relay, carburetor engine
wire fuel pump with relay, carburetor engine
Hello my friends,
I removed the injection on my 1982 C3 Corvette, I installed a carburetor with an electric fuel pump.
I want to protect the fuel pump with a relay, do you know what I can replace the original relay with?
Thanks a lot
Hello my friends,
I removed the injection on my 1982 C3 Corvette, I installed a carburetor with an electric fuel pump.
I want to protect the fuel pump with a relay, do you know what I can replace the original relay with?
Thanks a lot
Race Director
Joined: Nov 2006
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From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Just a standard 30 amp relay. Ya know, the square ones that are about 1 inch square.
The more important question would be, how are you triggering that relay. And what is your shut off plan?
In case of a crash, roll-over etc. How is this shutting off?
The more important question would be, how are you triggering that relay. And what is your shut off plan?
In case of a crash, roll-over etc. How is this shutting off?
Race Director
Joined: Nov 2006
Posts: 13,258
Likes: 7,848
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Yup, one of those. Gen. Bosch if you can. And still, you need a shut off in case of an accident. Inertia switch. Switched off of oil press or tach signal.
Something to control it. Shut off is critical in case of a accident. Pumping fuel continuously with engine not running and perhaps a burst line could cost you your life or the life of a loved one.
Something to control it. Shut off is critical in case of a accident. Pumping fuel continuously with engine not running and perhaps a burst line could cost you your life or the life of a loved one.
Melting Slicks
Joined: May 2021
Posts: 2,274
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From: Fleming Island, FL
The 82 already has a fuel pump oil pressure switch wired to a fuel pump. You could also repurpose some of the ECM wiring for fuel pump power while cranking by jumping two wires at the ECM. Connect the purple 906 crank discrete to dark green/white 465 fuel pump relay drive with a 1 amp diode. Easy peasy!
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
https://www.revolutionelectronics.co...ty-switch.html
You also source a Ford inertia switch (purely mechanical I believe) that will disconnect on a roll-over.
Oil pressure switch can also be used
You also source a Ford inertia switch (purely mechanical I believe) that will disconnect on a roll-over.
Oil pressure switch can also be used
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Pro
Joined: Oct 2017
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I used the Painless fuel pump kit 50102 when converting my 82 to carb.
https://www.summitracing.com/parts/prf-50102
https://www.summitracing.com/parts/prf-50102
Drifting
Joined: Mar 2006
Posts: 1,263
Likes: 188
From: Wabasha Mn
https://www.revolutionelectronics.co...ty-switch.html
You also source a Ford inertia switch (purely mechanical I believe) that will disconnect on a roll-over.
Oil pressure switch can also be used
You also source a Ford inertia switch (purely mechanical I believe) that will disconnect on a roll-over.
Oil pressure switch can also be used
Burning Brakes
Joined: Feb 2020
Posts: 904
Likes: 569
From: Central NJ
Are you using a pressure regulator?
I would suggest a bypass type, that will keep the pressure off the float seats after you shut off the engine, you can utilize the return line you already have from the CFI.
60
I would suggest a bypass type, that will keep the pressure off the float seats after you shut off the engine, you can utilize the return line you already have from the CFI.
60
Burning Brakes
Joined: Feb 2020
Posts: 904
Likes: 569
From: Central NJ
Do you know what the pressure you are running is? Or what the pump is rated for?
Most carbs like 5-7 lbs. Going over that could cause flooding or push fuel past the float needles when the car is off. That can run fuel down the manifold and cause hard starting and even fuel in the oil if its severe. A bypass regulator pretty much eliminates those things and keeps fuel circulating which will reduce the risk of vapor lock issues...
just a thought..
60
Most carbs like 5-7 lbs. Going over that could cause flooding or push fuel past the float needles when the car is off. That can run fuel down the manifold and cause hard starting and even fuel in the oil if its severe. A bypass regulator pretty much eliminates those things and keeps fuel circulating which will reduce the risk of vapor lock issues...
just a thought..
60
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
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From: South of giving a damn
St. Jude Donor '11, '17
IIRC the 82 fuel pump runs between 12 & 15 psi. You have to have a regulator to cut this to the pressures mentioned by MelWff. Otherwise 1860army's predictions come into play.
Drifting
Joined: Mar 2006
Posts: 1,263
Likes: 188
From: Wabasha Mn
I use a Mallory 4309(I think) on my carbed 84. Some other company may have purchased Mallory so not sure who makes it now. Beware of china built knock offs!!
