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Gas pressure
- 1748 S
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- STEVEN.KUIPER
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you remove the float and shake it....there's gas in there.
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- tayedils
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The only place that really counts is at the carburetor. For the needle valve to work right you want about 2 to 3 psi. Sometimes you can get away with 3.5 to 4 psi but I wouldn't try it.wcoye wrote: Hi from Raleigh! What is the correct gas line pressure for my 810?
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- mikespeed35
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Just a warning.
CORDiallyMike
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- wcoye
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Bill Coye
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- wcoye
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At one time gas did run through the mechanical pump. Sometime in the pass year someone who worked on my car bypassed the engine's pump....she generally works well...until this last hiccup
Bill Coye
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- 1748 S
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Gary Parsons
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- Terry Cockerell
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Mine is a low pressure Airtex 6 volt pump. I use it to prime the engine and run on the mechanical pump.
When it was on the road before starting the complete restoration of the car it ran like a steam train. I covered around 10,000 miles in 5 years. At times the engine would start to run rough when going up steep hills at highway speed so I switched the electric pump back on and found the engine powering on again., otherwise it ran beautifully on the mechanical pump.
I figure if I ran it on an electric pump all of the time, if that eventually played up I would be stranded.
I placed the electric pump close to the gas tank and have an in line filter between the tank and pump.
During the restoration work I found some distortion in the carburettor body to float top mating surfaces which allowed air to be sucked into the carburettor throat. This has been carefully rectified. Later this year when it is all back together I can start experimenting again.
Cheers from Down Under.
Terry Cockerell
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- Roads2run
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- Rileypu29
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I think that you are correct about my description of disabling the mechanical pump. I am sure that there is a way to have the fuel travel through the mechanical fuel pump but cutting out the diaphragm is likely not the way to do it. I would have to examine a mechanical diaphragm pump to see how to best do it. Likely disabling the pumping drive for the diaphragm would be the best way. Thank you for your correction.
Bill
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- 1748 S
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- Rileypu29
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Terry, I believe that my 812 is actually running completely on the electric fuel pump. I purchased the car from Gail Shaw and when I bought the car he told me that the mechanical pump is disabled and only for looks. I believe that he cut out the diaphragm so that gas pumped by the electric pump just passes through. I have not checked to see what type of electric pump I have on the 812, it is located under the car near the back. If anyone is interested please let me know and I will crawl under the car and take a look.
All of the comments about junk from the gas tank clogging the needle valve or sticking the float are right on. A discretely (or not) placed fuel filter can do a world of good.
Bill
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- Curt Schulze
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The bitterness of poor quality remains long after the sweetness of low price is forgotten.
Be of Good Cheer
Curt
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- George van Nostrand
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Restoring 1936 Cord Westchester sedan.2023 A
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- Terry Cockerell
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The electric pumps are supplied in two types, either low pressure or high pressure.
Obviously low pressure is the way to go. I use mine for priming the engine and on steep hills at speed when the engine starts to run a bit erratically. It will be very interesting to see how she performs after the complete rebuild.
T cockerell
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- wcoye
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I just checked my 812 S/C Phaeton and the answer is unanimous, it has the Holley fuel pressure regulator as well. I have also found it very useful to have a fuel pressure gauge on the system as well although the Holley regulator says that it comes preset at 2.8 psi which should be perfect. Attached are some pictures of the installation on my 812.
Good luck.
Bill
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- Rileypu29
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I have two Model A Fords running Stromberg 81 carburetors and I am using a Holley low pressure fuel regulator on both. Following is a link:
www.holley.com/products/fuel_systems/fue...ulators/parts/12-804
I have had good success with these with electric fuel pumps. My Cord Phaeton has a regulator on it as well, I will check to see what model when I get home from work.
Bill
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- Terry Cockerell
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- wcoye
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I'm thinking my pressure may be too high. Last evening I was toodling along and the engine suddenly cut out. No coughs or shutters.
I tried to restart, nothing. Popped the hood and found gas pouring out of the carb . I couldn't find any obvious problem. This morning she started right up. I idled her for a good 20 minutes trying to recreate the problem. Runs like a charm . Figure the needle valve was jammed. Gonna install a pressure regulator as a precaution
Bill Coye
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- JIM.OBRIEN
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It all depends on where you measure the pressure. The only place that really counts is at the carburetor. For the needle valve to work right you want about 2 to 3 psi. Sometimes you can get away with 3.5 to 4 psi but I wouldn't try it.
Some of the modern electric pumps put out 6 to 8 psi in which case you need a pressure regulator in there somewhere.
Jim
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- wcoye
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