Clay Smith fuel pump.

Fuel and Air Systems

  1. 67coronetman

    67coronetman Well-Known Member

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    No unfortunately when I bought the Carter fuel pump from summit I bought the wrong one so it's my fault that's it nothing I can really do about it now
     
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    • MW 413

      MW 413 Well-Known Member

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      Running a Clay Smith Mechanical on my 440 XRam with (2) 750cfm Eddys, 3/8"lines, no external regulator, 7psi and it works great. No fuel starvation at 6200rpm. No vapor lock. Keep things simple.
       
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      • khryslerkid

        khryslerkid FBBO Gold Member FBBO Gold Member

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        Not wanting to hijack the thread but I'm useing the 6903 and as you can see in my video it runs a steady 8 lbs. Problem that I'm having is after shutting it down it's still holding pressure. I'm thinking as it slowly bleeds down fuel is bypassing the needle and seats and fuel is getting into the crankcase. Had a slight fuel smell in the oil doing the last oil change. It's not running rich, plugs look great, I think this is happening after shut down and sitting for awhile.

        Thinking about useing a shut off and running the carbs dry before parking it.
         
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        • MW 413

          MW 413 Well-Known Member

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          Hey John, I think if you could get your PSI to 6 - 7lbs your post shut down flooding may stop. With multi-carb street set ups volume under load is more important than pressure. A good high volume mechanical pump with a 3/8"fuel line should feed your 2 Carters fine. Just my opinion.
           
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          • khryslerkid

            khryslerkid FBBO Gold Member FBBO Gold Member

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            And it's a good opinion.:)

            I had the same thought about either a regulator or a lower output pump to see if the needle and seat would hold back the lower pressure after shutdown better. Thanks
             
            Last edited: Apr 15, 2020
          • 67coronetman

            67coronetman Well-Known Member

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            Just kind of curious if you get time with you mind taking pictures of how you routed your fuel lines and how you hooked up your regulator and where and I was trying to get some ideas from how other people do it
             
          • 67coronetman

            67coronetman Well-Known Member

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          • 67coronetman

            67coronetman Well-Known Member

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            Not sure if my other reply went through but if you have time and you wouldn't mind could you take extensive pictures of how you had everything hooked up from the fuel pump up to your carburetor you know if you had a regulator on there how did you mount it so on and so forth I I can either give you my email if you private message me back or my number so you can text him if you're going to do that for me and the time.
            Thank you very much
             
          • Brewzer67

            Brewzer67 Well-Known Member

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            Here is the orientation I used for mine. I run the line up behind the alternator and to the regulator on the carb using a 90 degree fitting out of the pump and a 45 degree going in. I also have a piece of clear plastic line where the braided hose goes behind the alternator as extra insurance to make sure the braided hose never touches the output post. It really isn't near it, but an ounce of prevention as they say. It has been a great pump. It is easily rebuildable, and the diaphragm is alcohol compatible so ethanol fuel isn't an issue. I did have to massage (read...grind) the one side of the pump a little to clearance it for the block but it wasn't a big deal. Ten minutes with a hand file and a little touch up with some fine grit wet sanding paper and it was all set. I also use one of those Thermotec heat sleeves where it runs down by the torsion bar/headers to keep things a little cooler and fight the vapor lock issues I used to have. Since I put it on, no issues anymore.

            Fuel pump outlets.jpg Fuel line route.jpg
             
            Last edited: Apr 17, 2020
          • 67coronetman

            67coronetman Well-Known Member

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          • Dan64

            Dan64 FBBO Gold Member FBBO Gold Member

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            67Coronetman I see it says your from Blount co. , I assume that's Tn. correct?. If so what's the car scene like there?.
             
          • 67coronetman

            67coronetman Well-Known Member

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            Yes sir it is.. good car seen butwith everything that's going on they're not letting people gather you know what I mean
             
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            • Brewzer67

              Brewzer67 Well-Known Member

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              Unfortunately I have the motor pulled and everything apart right now so I can't get you a better picture. I did go through my old photos and have a few more that may help. Do these make it any easier?

              Fuel line route 2.jpg Fuel line route 3.jpg
               
              Last edited: Apr 18, 2020
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              • 67coronetman

                67coronetman Well-Known Member

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              • 67coronetman

                67coronetman Well-Known Member

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                Thank you very much that helps for me to get an idea how you did yours I've been looking at mine so I'm taking different ideas and going to try to combine them and make it work but I really appreciate you very much
                 
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                • Dan64

                  Dan64 FBBO Gold Member FBBO Gold Member

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                  I know they were doing a Friday evening show at the mall in Maryville, are there any other weekly/ monthly shows /cruises?. I'm in Maryville quite a bit and will probably move there or close by. Sorry for posting this on your thread , your in box is full.
                   
                • 67coronetman

                  67coronetman Well-Known Member

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                  I can give you my email it number if you private message me and we talk.
                   
                • Dan64

                  Dan64 FBBO Gold Member FBBO Gold Member

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                  Ok thanks, but your in box is full so it wouldn't let me leave you a p.m.
                   
                • 67coronetman

                  67coronetman Well-Known Member

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                  Ok in box is empty now.send me your info.
                   
                • 67coronetman

                  67coronetman Well-Known Member

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                  Ok i was told that I needed to run a Hardened Fuel pump pin with that clay smith pump would anyone have one they would part with .. ( Not factory style one ).
                   
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