Hi Dyke they don't “ require “ anything . That is the max they can turn off They require enough fuel to support the hp , which means keep full fuel bowl .
Gas in the bowl is at zero psi .
Also why you see dual feeds , on bog carbs , not 10 psi
B block pumps are used on six pack and hemi , one I tested on mine was 4 psi and problem free . They require gpm , not psi , right ? good discussion … jg On Oct 26, 2024, at 9:06 AM, Dyke Ridgley <ridgleyracing65@xxxxxxxxx> wrote:
Just to be clear and cover all the "Letter" cars, the fuel pressure specification for the Carter WCFB is 6-7 psi.
Dyke Ridgley
On Saturday, October 26, 2024 at 7:46:38 AM UTC-5 Dyke Ridgley wrote:
Danny:
Carter AFB carburetors are designed to require 5-8 psi fuel pressure. A electric pump putting out 4-6 psi is correct for the AFB carburetors.
Dyke Ridgley
On Saturday, October 26, 2024 at 6:35:50 AM UTC-5 dplotkin wrote:
Just in front of the tank. I would ignore advice to use a 4-6 psi pump. That could overcome a needle and seat. Fact is 1.5 psi has been working flawlessly for many years for many in the hobby.
Danny Plotkin
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message -------- Date: 10/25/24 10:45 PM (GMT-05:00) Subject: Re: {Chrysler 300} Electrical fuel pump
What is the ideal location for the facet pump?
Just wanted to add, The existing mechanical pump stays in place and pulls through the priming pump once started. Agree with Danny, I’ve had one on my G for at least 15 years that I got from John Lazenby, and a different style before it. They really are necessary if the car sits for more than a week due to gas evaporation. Install with a push button switch. Turn the key on, push button until pulsations slow, then crank over. Simple, effective, no cranking, cranking, cranking. As John G mentioned, some folks think the cranking helps pump oil before firing and beneficial. Personally, I don’t agree, unnecessary wear on the battery and starter. Besides, if you did want to crank it without priming, you’d still have that option, just don’t push the button. As far as opening the hood, unscrewing the air cleaner, pouring gas in the carb…what a pain, and a bit dangerous. You want a Facet cube pump. Its a little cube, pumps 1.5 psi and perfect for priming. John Lazenby installed one on my F when he owned it. The Facet will pump through the mechanical pump. I run it until she starts and then turn it off. Google a Facet 1.5 psi and it will pop right up. Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- Date: 10/24/24 8:02 PM (GMT-05:00) Subject: {Chrysler 300} Electrical fuel pump The electrical fuel pump on my 61G gave way and started leaking. This pump was installed prior to my purchasing the car. I only turn it on for about 20 sec. prior to starting the car and then turn it off. Question.....Is this something really necessary (I did replace the mechanical pump about a year ago)? If so, what would be a good replacement and what would the required GPM and PSI (there is no notation on the pump to go by.) See attached for what was installed by a previous owner. --
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