Fuel Pump output Pressure
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1st Gear
Joined: Dec 2024
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Fuel Pump output Pressure
Hi All,
New to this Forum..
Got a Fuel Pump pressure question. maybe someone can help..
I have a 1951 Ford Hotrod with what I was told a mid 80s to early 90s 5.0 EFI engine.
Stock 51 gas tank in car with one external fuel pump. Looks to be a stock style E2000 Ford pump, like from an F150 with the mounting bracket.
The pump has issues and needs to be changed, so I am looking at a Bosch 69100 replacement.
This pump puts out over 90lbs of dead head pressure, so I'm told.
Question is, will my stock regulator handle it? and what would the factory Ford fuel pump pressure have been?
Thank You!
New to this Forum..
Got a Fuel Pump pressure question. maybe someone can help..
I have a 1951 Ford Hotrod with what I was told a mid 80s to early 90s 5.0 EFI engine.
Stock 51 gas tank in car with one external fuel pump. Looks to be a stock style E2000 Ford pump, like from an F150 with the mounting bracket.
The pump has issues and needs to be changed, so I am looking at a Bosch 69100 replacement.
This pump puts out over 90lbs of dead head pressure, so I'm told.
Question is, will my stock regulator handle it? and what would the factory Ford fuel pump pressure have been?
Thank You!
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Does your truck have a fuel return line? If not then that is why you're having pump problems..they are not designed to work into a dead head continuously.. they don't have an internal bypass
I believe the oem pumps were capable of upwards of 100psi dead head too, but pressure at the engine was limited to 42-45psi max by the regulator on the fuel rail.
I believe the oem pumps were capable of upwards of 100psi dead head too, but pressure at the engine was limited to 42-45psi max by the regulator on the fuel rail.
Cargo Master
Joined: Mar 2007
Posts: 2,822
Likes: 1,029
I always think of it this way, fuel pumps do not make pressure. All they do is flow. The restriction causes the flow to back up and that is where the pressure comes from. How much pressure a pump can handle is part of the design. How much pressure is in the system is caused by the regulator. Some are static, some variable.
Most fuel pumps are designed to rotate. If you stop the flow, you can break things because the pump still wants to move, but it can't. Something has to happen. A burned up pump motor, internal part, etc. I would never dead head a pump, even if it has a bypass built in.
Just my opinion.
Most fuel pumps are designed to rotate. If you stop the flow, you can break things because the pump still wants to move, but it can't. Something has to happen. A burned up pump motor, internal part, etc. I would never dead head a pump, even if it has a bypass built in.
Just my opinion.
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