OEM mechanical fuel pump pressure

[texas_rat_trap]

Anybody know what the P.S.I. on a stock mech. fuel pump. Just juggling the to mech. or electric. Cuz I'm runnin' 94's and I'm having problems regulating fuel pressure within 2.5 psi.

 

[fmartin_gila]

One of my reference books shows 4.5 PSI @ 475 RPM, another shows 3.5 to 5.5 PSI @ 500 RPM. The first reference is for a 1964 223 and the second reference is for a 1962 223. By your valve cover, it looks like you have the early 223, but I wouldn't think there would be any difference in the pump specs.

Fred

 

[texas_rat_trap]

The valve cover on my engine is a modified 215 valve cover....but I need the pressure to be no more than 2.5 psi & am having problems regulating fuel to the 94's

 

[jamyers]

2.5 is awful low... sounds like the problem in in the carbs?

 

[rmt]

I have a tripower on my wagon's 292 Y-block. It has 3 94's, though I'm only running one. Researching the 94 resulted in finding out they only use about 1 to 2psi. No more than 2. They will commence to have a number of problems one would expect with too much pressure.

I run mine at approximately 1 1/4psi. Runs great, but I may try to go lower. I think it is still fat, haven't pulled a plug yet though. I'll go as low as it will stand.

I know it sounds low but you have to remember where and when these old carburetors were used. Long time ago on very basic, very old tech engines.

Got my information from a number of sources on the HAMB. The reliable ones, not from the come-lately types that have nearly taken the place over and largely made it a waste of time now. But there is still a wealth of information to be searched.

Roger

 

[jamyers]

I didn't know any carb liked that little pressure. Guess that dates from the days of no fuel pumps and gravity feed fuel tanks?

 

[fmartin_gila]

Here is an invite to come over and see and/or join our group at FordTruk.com. I know there is at least one member running multi carbs on a 223. It is dedicated to the 61-66 F100, but in reality, no one is excluded. And there is a world of information there.

Fred

 

[rmt]

I didn't know any carb liked that little pressure. Guess that dates from the days of no fuel pumps and gravity feed fuel tanks?

No but right after that. I think they were only trying to replace the force of gravity so they could relocate fuel tanks.

 

[texas_rat_trap]

I have a tripower on my wagon's 292 Y-block. It has 3 94's, though I'm only running one. Researching the 94 resulted in finding out they only use about 1 to 2psi. No more than 2. They will commence to have a number of problems one would expect with too much pressure.

I run mine at approximately 1 1/4psi. Runs great, but I may try to go lower. I think it is still fat, haven't pulled a plug yet though. I'll go as low as it will stand.

I know it sounds low but you have to remember where and when these old carburetors were used. Long time ago on very basic, very old tech engines.

Got my information from a number of sources on the HAMB. The reliable ones, not from the come-lately types that have nearly taken the place over and largely made it a waste of time now. But there is still a wealth of information to be searched.

Roger

Hey roger what fuel pressure regulator you runnin' and where can I pick it up at.

 

[rmt]

Got mine through Summit.

Roger