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Re: [GMCnet] Carter 4070 electric fuel pump plumbing [message #261386 is a reply to message #261381] Tue, 09 September 2014 09:06 Go to previous messageGo to previous message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
Senior Member
Armand,

All I did was quote what Doc Frohmader noted which aligns with what Dick says. I have NO experience with the Carter 4070.

I currently have a small Facet pump (4 psi) that comes on and feeds the mechanical fuel pump when I have a vapor lock problem. I was
installed by JimB YEARS ago and works just fine. Yes, I realize that if the diaphragm fails it will pump the crankcase full of gas.
Yes, I am aware of some guy that failed several engines because he moved a fuel pump with a defective diaphragm from engine to
engine.

I purchased and will be installing in tank pumps from a Buick Riviera which put out 5-7 psi. However, I am going to feed a surge
tank which will have a return plumbed to the fuel filler vent so the net delivery pressure to the mechanical fuel pump will be damn
near zero. That system was not my idea it was Steve Southwood's. It allows you to convert to EFI simply by plumbing the outlet of
the surge tank to the EFI pump. Yes I am aware that it adds an extra pump, However, I'd rather have fuel lines under the coach
pressurized to 7 psi rather than the higher pressure an EFI system requires because if a leak were to occur the higher pressure
would result in more fuel being pumped overboard.

Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
USA '75 Avion - Double Trouble TZE365V100426
AUS '75 Avion - The Blue Streak TZE365V100428


-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Armand Minnie
Sent: Tuesday, September 09, 2014 8:49 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Carter 4070 electric fuel pump plumbing

Rob, I don't understand your answer. The P4070 is supposed to put out 5-7 pounds which Dick Paterson said was correct. Are you
saying you don't trust it to be used full time?
--
Armand Minnie
Marana, AZ
'76 Eleganza II TZE166V103202
http://www.minniebiz.com
http://www.gmcws.org

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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