Electric fuel pump
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Joined: Sep 2011
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Electric fuel pump
Can I bypass the mech fuel pump with an electric one on a '51 239 with a single carb?
The fuel pump on my 1951 F1 is leaking and I have a small elec one on the shelf. It would only be a temporary solution.
As always thanks for reading
The fuel pump on my 1951 F1 is leaking and I have a small elec one on the shelf. It would only be a temporary solution.
As always thanks for reading
Fleet Mechanic
Joined: Aug 2010
Posts: 1,994
Likes: 3
From: Morgan Hill, CA
Go with whatever the carburetor manufacturer says for pressure. If it's a stock carb, use the service manual to find the stock fuel pressure range. 4-6 psi is probably OK for most carbs....if it's much more than that, it makes it harder for the float to close the float valve in the carb....so what ends up happening is that the fuel level in the float bowl rides up a little higher than it would with a lower pressure. That makes the engine run a little more rich through all of the operating ranges.
A thing to watch out for is to make sure that your pump isn't a fuel injection version that is set to run at 20 to 30 psi.
Dan
A thing to watch out for is to make sure that your pump isn't a fuel injection version that is set to run at 20 to 30 psi.
Dan
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Fleet Owner
Joined: Jul 2004
Posts: 27,300
Likes: 1,059
From: NM
You'll need a pressure regulator unless it is a low-pressure pump. The best pressure for a Holley 94 used on stock flatheads is 1.5 - 2.0 psi. I recommend the Holley 12-804 regulator, I've been running one for more than 5 years with no problems. I see lots of people complaining about the Spectre round-dial regulators sold at AutoZone and such.
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