| Dual fuel pumps [message #172258] |
Wed, 06 June 2012 12:33  |
zhagrieb
Messages: 676
Registered: August 2009
Location: Portland Oregon
Karma: 0
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I'm planning on adding a second Carter, set up with one for each tank. Do I need to add one way valves?
Glenn
Glenn Giere, Portland OR, K7GAG
'73 "Moby the Motorhome" 26'
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| Re: [GMCnet] Dual fuel pumps [message #172269 is a reply to message #172258] |
Wed, 06 June 2012 14:48  |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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I would suggest that a check valve in the discharge of each pump would
be a good choice.
JR Wright
GMC Great Laker MHC
GMC Eastern States
GMCMHI
78 Buskirk 30' Stretch
1975 Avion (Under Reconstruction)
Michigan
>
>
> I'm planning on adding a second Carter, set up with one for each
> tank. Do I need to add one way valves?
>
> Glenn
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: Dual fuel pumps [message #172274 is a reply to message #172258] |
Wed, 06 June 2012 15:52 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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If you eliminate the electric tank selector valve and replace it with a "tee" then yes you need two check valves. Otherwise the answer no.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Dual fuel pumps [message #172293 is a reply to message #172258] |
Wed, 06 June 2012 18:01 |
bumpersticker
Messages: 60
Registered: February 2004
Location: Redondo Beach, CA
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I have been running dual fuel pumps for the last 10 years without any problems. I used 2 AC Delco EP12S pumps, mounted as close to the tanks as possible. I teed them to the fuel line directly eliminating the fuel transfer valve. These fuel pumps will act as one way valves. I installed a oil pressure safety switch on the engine, then run a fused 10 ga wire to a relay mounted where the transfer valve used to be. The wire that was on the transfer valve can be hooked to the relay to the NO pin. This allows the tank switch on the dash to work normally. If the AC Delco pump is not available a substitute is E8012S at most parts stores.
The pumps are small enough that they can be mounted inside the frame rails and are out of the way and have totally eliminated vapor lock.
Works for me!
Bob Cook
78 Birchaven
75 Avion (In work)
Redondo Beach, CA
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| Re: [GMCnet] Dual fuel pumps [message #172297 is a reply to message #172293] |
Wed, 06 June 2012 18:33 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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Bob,
Did you isolate the pumps in any way to minimize the sound inside the coach?
Larry Davick
Fremont, California
The Mystery Machine
'76 (ish) Palm Beach
----- Original Message -----
From: "Bob Cook" <bcgmc@verizon.net>
To: gmclist@temp.gmcnet.org
Sent: Wednesday, June 6, 2012 4:01:50 PM
Subject: Re: [GMCnet] Dual fuel pumps
I have been running dual fuel pumps for the last 10 years without any problems. I used 2 AC Delco EP12S pumps, mounted as close to the tanks as possible. I teed them to the fuel line directly eliminating the fuel transfer valve. These fuel pumps will act as one way valves. I installed a oil pressure safety switch on the engine, then run a fused 10 ga wire to a relay mounted where the transfer valve used to be. The wire that was on the transfer valve can be hooked to the relay to the NO pin. This allows the tank switch on the dash to work normally. If the AC Delco pump is not available a substitute is E8012S at most parts stores.
The pumps are small enough that they can be mounted inside the frame rails and are out of the way and have totally eliminated vapor lock.
Works for me!
--
Bob Cook
78 Birchaven
75 Avion (In work)
Redondo Beach, CA
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] Dual fuel pumps [message #172299 is a reply to message #172297] |
Wed, 06 June 2012 18:44 |
bumpersticker
Messages: 60
Registered: February 2004
Location: Redondo Beach, CA
Karma: 0
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Larry:
The pumps are mounted in a rubber lined cable clamp. this seems to isolate the sound somewhat. You can still hear them if you listen carefully.
Bob Cook
78 Birchaven
75 Avion (In work)
Redondo Beach, CA
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| Re: [GMCnet] Dual fuel pumps [message #172318 is a reply to message #172297] |
Wed, 06 June 2012 21:06 |
mickeysss
Messages: 1476
Registered: January 2012
Karma: 0
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where are and what kind of fuel filters do you use, where do you put them please, thank you, toast butter and jam to you. regards m.
On Jun 6, 2012, at 4:33 PM, Larry Davick wrote:
> Bob,
>
> Did you isolate the pumps in any way to minimize the sound inside the coach?
>
>
> Larry Davick
> Fremont, California
> The Mystery Machine
> '76 (ish) Palm Beach
>
> ----- Original Message -----
> From: "Bob Cook" <bcgmc@verizon.net>
> To: gmclist@temp.gmcnet.org
> Sent: Wednesday, June 6, 2012 4:01:50 PM
> Subject: Re: [GMCnet] Dual fuel pumps
>
>
>
> I have been running dual fuel pumps for the last 10 years without any problems. I used 2 AC Delco EP12S pumps, mounted as close to the tanks as possible. I teed them to the fuel line directly eliminating the fuel transfer valve. These fuel pumps will act as one way valves. I installed a oil pressure safety switch on the engine, then run a fused 10 ga wire to a relay mounted where the transfer valve used to be. The wire that was on the transfer valve can be hooked to the relay to the NO pin. This allows the tank switch on the dash to work normally. If the AC Delco pump is not available a substitute is E8012S at most parts stores.
> The pumps are small enough that they can be mounted inside the frame rails and are out of the way and have totally eliminated vapor lock.
> Works for me!
> --
> Bob Cook
> 78 Birchaven
> 75 Avion (In work)
> Redondo Beach, CA
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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