Fuel pump

[37 Cab]

Can I use a later fuel pump with the glass bowl on my 37 21 stud motor? Do I need to change the stand or intake for it to work or can I just bolt it on?

[Terry,OH]

Usually a bolt on, be aware there are two of the later pumps with the glass bowl and the difference is the thread of the input and output the very late pumps have NPT thread.

[51woodie]

Also, check for the correct length of the pushrod. I know I have read somewhere that there are different lengths, depending on year, pump, tower etc. Someone more knowledgeable that I may chip in here.

[37 Cab]

Thank you. The reason I ask is because that is what I have on my car now. It has never worked well enough to supply fuel without the electric pump running. It will run the engine but it starves at higher speeds. I put a rebuild kit in it without noticeable change. The electric pump I am running is a carter inline from Macs. (See link) Could be a problem with the push rod I suppose. Anyone know the length it should be on my car? I will check length and lift next.

https://www.macsautoparts.com/ford_m...d-mercury.html

[deuce lover]

Exactly what Terry says and in 37 Cab's case he can use the same pushrod.

[deuce lover]

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Originally Posted by 37 Cab

Thank you. The reason I ask is because that is what I have on my car now. It has never worked well enough to supply fuel without the electric pump running. It will run the engine but it starves at higher speeds. I put a rebuild kit in it without noticeable change. The electric pump I am running is a carter inline from Macs. (See link) Could be a problem with the push rod I suppose. Anyone know the length it should be on my car? I will check length and lift next.

https://www.macsautoparts.com/ford_m...d-mercury.html

What intake are you running?

[37 Cab]

It is the stock aluminum intake for my 37.

[deuce lover]

Originally Posted by 37 Cab

It is the stock aluminum intake for my 37.

Pushrod should be 7.87" long.

[deuce_roadster]

The cam lobe the rod rides on may be worn if the rod itself is the correct length. I have seen a KRW tool that measures the length of travel of the rod. A dial indicator could do the same thing.

[37 Cab]

That is my fear.. I have a dial indicator. Thanks Deuce!

[flatjack9]

Lift on the lobe is around .20 - .25.

[Kube]

37cab, If by chance the cam lobe is worn, a simple and rather lasting repair is to place a small piece of leather (stamp it out of an old belt) in the cup of the pump.

I might suggest you send your pump to CharlieNY (here on the Barn) for a proper build. There's a lot more to doing it properly than throwing a kit in it.

Other things to check for are vacuum leaks in the fuel line(s). Check the flex hose to be certain it is not sucking air.
Also, this electric pump you have... is it a pass through type? A simple test would be to bypass the electric pump for a test drive.

If memory serves me well, the lift on the lobe is .256".
The rod should be 7.866" +0 / -.006".

[Tinker]

I do. I like the glass bowl pumps. It catches debris. Not sure that the fuel pump rod length makes a difference with the glass early pump less you change the intake. or you have a 8ba or pump.

A old wise tale was to use a poker/player card to make a pump gasket to increase pressure, as it was thinner. Might help....

My thinking is if the cam lobe is wore, it's not good. Does that happen?

Thought the rod throw was around a 1/4" +/-. As posted.


.

[tubman]

I once had a problem with the glass bowl type pump where there was a slight leak around the glass bowl. It was very difficult to find, but when I did, I solved it by lapping the mating surface of the glass bowl using wet-r-dry paper on my surface plate and re-installing it using a new CORK gasket. It seems counter-intuitive, but the cork gaskets seem to seal better than the neoprene gaskets usually supplied with the kits.

[Kube]

Originally Posted by Tinker

I do. I like the glass bowl pumps. It catches debris. Not sure that the fuel pump rod length makes a difference with the glass early pump less you change the intake. or you have a 8ba or pump.

A old wise tale was to use a poker/player card to make a pump gasket to increase pressure, as it was thinner. Might help....

My thinking is if the cam lobe is wore, it's not good. Does that happen?

Thought the rod throw was around a 1/4" +/-. As posted.


.

I have only experienced a couple of cars wherein the lobe was worn enough to cause similar issues to what the original post had described. So yes, it does happen and no, it's not good.