| Dual Fuel Pumps on the Howell EFI System [message #365359] |
Sun, 11 July 2021 19:23  |
Tom Katzenberger
Messages: 399
Registered: June 2019
Location: Kingsville, MD
Karma: 4
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Senior Member |
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Good evening all,
Is anyone using dual fuel pumps on the Howell EFI system. If so what pumps are you using? Do you have to Manually select the tanks via the pumps?
Thanks,
Tom K.
Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition
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| [GMCnet] Re: Dual Fuel Pumps on the Howell EFI System [message #365361 is a reply to message #365359] |
Sun, 11 July 2021 20:01  |
stu@97381.com, Emery
Messages: 232
Registered: June 2020
Karma: 2
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Senior Member |
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I am using in tank fuel pumps with the Howell system. You wire them using a relay so that when you push the tank selector switch I
On the dash when you switch to main it uses the pump in the main tank. When you switch to Aux it uses the pump inn the Aux tank.
Emery Stora
> On Jul 11, 2021, at 6:24 PM, tomkatz3@comcast.net wrote:
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>
> Good evening all,
>
> Is anyone using dual fuel pumps on the Howell EFI system. If so what pumps are you using? Do you have to Manually select the tanks via the pumps?
>
> Thanks,
> Tom K.
> --
> Tom & Oki Katzenberger,
> Kingsville, Maryland,
> 1977 23' Birchaven, 455 C.I.D.
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> GMCnet mailing list
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| [GMCnet] Re: Dual Fuel Pumps on the Howell EFI System [message #365371 is a reply to message #365359] |
Mon, 12 July 2021 10:29 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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I'm using 3 pumps. 2 lift pumps that feed a surge tank, and 1 high pressure pump that feeds the TBI.
If not for TBI 2 pumps would be good.
This shows the dual lift pumps, High pressure pump is seperate
http://www.gmcmhphotos.com/photos/data/7303/PumpV2.jpg
[http://www.gmcmhphotos.com/photos/data/7303/PumpV2.jpg]
________________________________
From: tomkatz3@comcast.net
Sent: Sunday, July 11, 2021 7:23 PM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] Dual Fuel Pumps on the Howell EFI System
Good evening all,
Is anyone using dual fuel pumps on the Howell EFI system. If so what pumps are you using? Do you have to Manually select the tanks via the pumps?
Thanks,
Tom K.
--
Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D.
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: Dual Fuel Pumps on the Howell EFI System [message #365375 is a reply to message #365359] |
Mon, 12 July 2021 11:14 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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I put a in-tank fuel pump in each tank. I eliminated the fuel selector valve, and have it wired to control the pumps from the dash fuel selector switch. Fuel is pumped out of the selected tank and through a check valve that keeps fuel from backing up into the non selected tank. Fuel hits a "Y" connecting both tanks to common line running up the frame rail to the cross member in front of the front (Aux) tank. A "T" in the line splits off to a fuel pressure regulator mounted on the frame rail in front of the front tank. When fuel in the system reaches 58psi, the regulator sends the fuel back to the Aux tank via the front tank drain plug. The return line to the tank is protected by a piece of angle iron covering the line. I have fashioned a tube that has a right angle to it to direct returning fuel along the bottom of the tank to avoid a geysering effect. Fuel at 58lbs then goes directly to the throttle body. No return from the TB because excess fuel has been returned to the tank at the regulator. This also does not allow fuel that has been heated by the engine to be returned to the tank. Been running it this way for 10yrs now with no issues. On a side note, IF you are running with a FiTech FCC, or any other kind of accumulator, DO NOT mount that FCC/accumulator out in front of the radiator. A front end crash could rupture it and feed the resulting flames that are right in front of you. If you are using a FiTech the newer version of the FiTech FCC that can be mounted along the frame rail is a better choice. JMHO
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
[Updated on: Mon, 12 July 2021 11:16] Report message to a moderator |
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