AMC Fuel Pump

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  • hudsonguy
    hudsonguy Senior Contributor
    SuperDave wrote:
    I like your idea because it may keep the stack compression from causing loose bolts and subsiquent leaks. If you can find some phenolic material. It works great. We have used it to raise carbs off manifolds for years on stock cars and it takes the heat without distorting or transfere. Some racers call it a "wood" spacer. but then again some aren't too bright LOL.. One source of phenolic blocks might be a used electronic outlet.. one of those surplus places.

    Good luck, Davew



    Hmmm....maybe I'll look at having a bunch of these made up, and selling them to other HET'ers.



    Davew, Phenolic is a good choice, but it might be better done in Ultem (polyethermide). They're roughly the same cost (which isn't too bad), and the mechanical/chemical/heat resistance characteristics of Ultem is far superior. Easier to machine too. I'll have to do some 'number crunching' to see what the possiblities are as far as cost, but I think it could be done for a pretty reasonable cost. It should be a far superior part to the gasket stack regarding oil leaks, etc.



    7XPacemaker, I'll let you know how it works out.



    Does anyone know for certain if the gasket stack thickness dimension is .275"?



    I think Walt M. told me that once. I could always email him again.



    Hudsonly,

    Doug
  • [Deleted User]
    [Deleted User]
    I've been reading this thread all along. I do wonder where a person might find a high performance AMC fuel pump? I'm interested in something that might get as high as 10-12 psi.



    I'm gonna use a regulator, of course - but I have ideas that will require a higher pressure that I can vary according to manifold pressure.



    Mark
  • [Deleted User]
    [Deleted User]
    hudsonguy wrote:
    Hmmm....maybe I'll look at having a bunch of these made up, and selling them to other HET'ers.



    Doug:



    I would buy and try. I looked into that as well. The only local CNC machine shop would not even try it for under $100.00. I did want to to use stainless steel so that had something to do with it.



    But if you get this non-metal version, I will try it.
  • 7XPacemaker
    7XPacemaker Senior Contributor
    `Hudsonator wrote:
    I've been reading this thread all along. I do wonder where a person might find a high performance AMC fuel pump? I'm interested in something that might get as high as 10-12 psi.



    I'm gonna use a regulator, of course - but I have ideas that will require a higher pressure that I can vary according to manifold pressure.



    Mark



    The on that I put on my Pacemaker said "Carter Hi flow" on the side of it. I don't know wherre you could get one, But they do exist......
  • Unknown
    Unknown
    If it's just a spacer you guys want, why not take an old pump, cut off the flange, smooth it out, and make it the proper thickness? I know it doesn't do a lot for heat transfer, but it gety you a durable spacer.



    I have seen metal spacers for hudson pumps. I just kept my gasket stack.
  • hudsonguy
    hudsonguy Senior Contributor
    hudsonkid wrote:
    If it's just a spacer you guys want, why not take an old pump, cut off the flange, smooth it out, and make it the proper thickness? I know it doesn't do a lot for heat transfer, but it gety you a durable spacer.



    I have seen metal spacers for hudson pumps. I just kept my gasket stack.



    That sounds like a heck of a lot of work for a one-of-a-kind spacer that will transfer heat. I don't imagine everyone has a scrap pump lying around either.



    I guess my initial goal was to improve upon the gasket stack with regards to oil leaks, as well as durability and looks. I didn't even realize the heat transfer issue until it was pointed out to me, but that would be another area for improvement. I'm sure a rugged plastic would be a better performer there than the composite gaskets that comprise the gasket stack. I'm not saying the gasket stack doesn't work. I'm just personally looking for an improvement in this part on my car. The same thinking could apply to the gasket stack(s) under the carburetor. They tend to seep fuel after awhile, staining the manifold and it seems they could be improved upon as well.



    I'm lucky to have a place of employment where I'm able to use the shop for personal projects from time to time. It's a simple exercise to create a CAD solid model of these parts, buy some material, and program the CNC mill to crank them out. I though maybe I'll even check the heat transfer thru the parts with a digital thermometer using two thermocouples, just to be able to compare it to the gaskets.



    I'm just trying to keep myself busy and have some fun in the Hudson garage this winter, I guess I've got all of the 'big stuff' done already!
  • Unknown
    Unknown
    hudsonguy wrote:
    That sounds like a heck of a lot of work for a one-of-a-kind spacer that will transfer heat. I don't imagine everyone has a scrap pump lying around either.



    leave it to hudsondad, he whipped one up. He had one of those messed up fuel pumps laying around, probably from a junk engine or something. He might of even found one with the same mounting boss, out of one of those 5.00 a pump piles you see at hershey, and the likes. Doesn't have to be hudson, just has to have the same mounting flange....
  • Unknown
    Unknown
    I wouldn't cut up a Hudson pump. Most of the pumps from that era have the same flange and bolt pattern. Any old car swap meet could get you a suitable used core to cut for a buck or two. The position, length and angle of the arm is what is most unique with the hudson pump.
  • Unknown
    Unknown
    hudsondad wrote:
    I wouldn't cut up a Hudson pump. Most of the pumps from that era have the same flange and bolt pattern. Any old car swap meet could get you a suitable used core to cut for a buck or two. The position, length and angle of the arm is what is most unique with the hudson pump.



    Yeah, I figured you didn't. I was hoping you would have made me one... :D
  • [Deleted User]
    [Deleted User]
    I don't know about the stack help prevents vapor lock theory, but as to the rest, if you are not going to use a Hudson Pump, I fail to understand why you would buy a pump you need a gasket stack for when you can just use one thin gasket (provided in the box) if you get NAPA M6748.
  • faustmb
    faustmb Senior Contributor
    I finally picked up a Carter M6737 fuel pump from Napa. It doesn't seem right. The lever interferes with the OE gasket stack on top and it doesn't seem like it wants to fit in the block very well. Can one of you experts out there confirm if this is the right pump? The original pump is on the left...



    Thanks in advance,

    Matt
  • mars55
    mars55 Senior Contributor
    That fuel pump looks just like the 6737 pump I got from Carquest for my '49 Commodore and yes, I had to trim the OE gasket stack on top with a hand electric grinder. Also, I had to use a 1/2 inch spacer (my spacer was 5/16"). With the 5/16 spacer the pump made a knocking noise.
  • faustmb
    faustmb Senior Contributor
    Thanks for the info. I figured that a little grinding would help out if it truely is the right pump. I'll give it a go tomorrow.



    Matt
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