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Fuel pressure with factory E dual quads

Posted By slumlord444 8 Years Ago
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Jerome
Posted 8 Years Ago
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Sounds like you might have a flow restriction between the fuel pump suction and gas tank vent. Inspect the suction line and gas tank vent tube very carefully for pressure drop threats. Happy hunting.
Sandbird
Posted 8 Years Ago
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slumlord444 (6/22/2017)

I had to add an electric pump when I first put the E setup on the car in '66. It would totaly run out of gas like you shut the key off when I hit 3rd gear with a totaly stock engine. The pump fixed that. I often wondered if owneres had this problem in '57?

Slumlord
I had the same problem when I made a hard run at wot going through the gears while running at wot 4 or 5 seconds at high rpm into 3rd gear the carbs would run out of gas and I would drift to a stop. Checked the usual ,fuel pump, float levels and fresh rebuilt carbs. I just learned to live with it by not making any hard high gear runs. Later I found the cure by accident. When I first put my E Bird together it was missing the trash can fuel filter and I had the stock single 4 barrel factory A/C fuel filter on the engine, this was in the early 70's and trash can fuel filters were very hard to find.
I kept looking for one because I thought they were neat looking. Much later I finally got my hands on one and installed it. Surprisingly my fuel starvation problem immediately was cured. Bottom line Ford put it on the engine for a reason.







DryLakesRacer
Posted 8 Years Ago
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I'll throw in one more thing. I run small base Carter WCFB's on my dual quad 56 Victoria. It's a 292. 3 or 4 times a year I go to a gathering about 15 miles away by freeway. Coming home those Sunday mornings changing freeways I lay into those dual 4 barrels from about 55 mph to over 90 mph and it never misses a beat with the stock mechanical pump and 5/16" line. May not be enough but so far it's never failed me.

56 Vic, B'Ville 200 MPH Club Member, So Cal.
Kahuna
Posted 8 Years Ago
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engine Sep 4 2010 006.jpg
I have this setup on my Flathead engine in a '32 Sedan.
I have a Beldan electric pump from NAPA that puts out
a very consistant 5# pressure.
No problems
Jim


Something I just remembered & thought I'd add:
My NAPA guy (very knowledgeable), mentioned that
around & up to about 1978,  Toyota trucks used
an in-tank fuel pump with a low pressure output of
around 7#. I have not investigated this any, but thought
that it might provide a reliable & economical answer to
aftermarket fuel pump problems.
Jim

slumlord444
Posted 8 Years Ago
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The Carter sounds better but I already bought the Holly and am in the middle of installing it. I do like the fact that it came with a pressure reguilator.
charliemccraney
Posted 8 Years Ago
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My Holleys were mounted so that the inlet and outlet was below the bottom of the tank.  They still failed.

The Carter can be mounted something like up to 18" above the top of the tank - double check the instructions.  Much more versatile.

If the position of the pump can result in failure, I imagine there would only be a threat once the fuel level in the tank drops below the level of the pump.  If that is correct, position it right at the bottom and don't run it out of gas.

Because the fittings are on the very bottom, the Holley pump will not be much lower than the tank when positioned correctly so there is probably not much more of a  threat of being hit than anything else under the car.

The design of the Carter, on the other hand, could require mounting above the bottom of the tank to avoid road threats..  It has the fittings near the top.


Lawrenceville, GA
slumlord444
Posted 8 Years Ago
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Its interesting that Rono has his pump above the axel housing on the frame. I read the instructions again and realized that Holly says the pump has to be mounted below the level of the gas tank. Called their tec guy and explained that there is no place to mount it below the tank. He says if you don't the pump will fail. I had a cheap Carter pump mounted in the trunk for many years and no issues. Now I am trying to figure how to attach a bracket to the frame to get the pump below the tank. Difficult to do so it doesn't get hit by something and how to route the fuel lines to clear the rear suspension as it moves up and down. Someone here had problems with early failure. Was the pump mounted above the tank? My pump was mounted above the axel housing on the frame but I am not sure how long it was on the car or hom much it was actually run as the car was apart for a long time.
DryLakesRacer
Posted 8 Years Ago
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I left Holleys electric pumps years ago and went to Mallorys. I also found the Holley regulators were really the problem. We currently use Areo Space Products regulators with both electric (LSR engine) and mechanical (circle track engine) pumps they maintain perfect pressure at 5.5 psi the recommended pressure by our carb guy.

56 Vic, B'Ville 200 MPH Club Member, So Cal.
Vic Correnti
Posted 8 Years Ago
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I am thinking the blue pump was designed to run with a regulator since it came with one. I would set the pressure as Ted mentioned for the teapots. I have ran a red one for 25 years with no regulator and nitrous, and a blue one for over 10 years with a regulator with two 600 Edelbrocks. My street usage is more short trips then long ones though.


http://forums.y-blocksforever.com/uploads/images/7393d096-cbf0-4ed0-bfdc-c4b0.jpg  Vic Correnti


charliemccraney
Posted 8 Years Ago
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I think it is probably that the newer Holley pumps are junk.  The two that failed on me, I had about 8 years ago.  Both failures occurred within a year.  Switched to Carter, Made in USA on the box, no problems since.

I like the Carter design a lot more.  It has a bowl.  I think the motor is in that bowl, providing a means to keep the motor cool, as an in tank pump would.  The Holley has no effective means of keeping cool.


Lawrenceville, GA


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