Mech Fuel Pump Drag Racing 318

Fuel and Air Systems

  1. 72DMag

    72DMag Well-Known Member

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    Does anyone have any recommendations for a mechanical fuel pump to use on a 318 for drag racing? Engine is a standard bore, stock stroke, 10:1 318 with 302 heads and a 650 demon carb. Cam is comp cams 268 grind flat hyd tappet. Car is going to have 4.56 gears.

    Would like to have a fuel pump that does not require a fuel regulator like the discontinued Carter M6902 fuel pump.
     
  2. rumblefish360

    rumblefish360 I have escaped the evil Empire State! FABO Gold Member

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    Holley has what your looking for.
     
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    • 72DMag

      72DMag Well-Known Member

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      @rumblefish360 The holley 12-36-11. Saw that but wasn't thrilled about the price. I couldn't find anything else made by carter.
       
    • Professor Fate

      Professor Fate Push the button, Max...

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    • roccodart440

      roccodart440 Well-Known Member

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      Mancini Racing lists the Carter pump you want but an Edelbrock Part Number 1720 will handle up to 600hp and doesn't require a regulator.
       
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      • RustyRatRod

        RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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        What's your budget? Not tryin to be smart, but you're not gonna find something for fifty bucks.
         
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        • 318willrun

          318willrun Utube channel 318willrun

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          stock fuel pump.
           
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          • rumblefish360

            rumblefish360 I have escaped the evil Empire State! FABO Gold Member

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            I am running the Carter high flow fuel pump and that will show a short coming in round robins (back to back) runs with the vehicle slowing down a tad. This is on a street driver, not a race car. Two different fuel needs and requirements. Both can do a good job in feeding enough fuel but one is simply better at it and does it consistently.

            REALLY! In a drag car, if you MUST run a mechanical pump, that’s one thing, but if you don’t have to, run an electric pump. Now everyone can cry there to much money, there more complex, and cry about having to run a regulator and return line. Fine, make all the excuses you want but an electric pump with a regulator and return line is what you should be doing at a minimum!

            How complex after that basic set up you go is on you.

            The bottom line in drag racing is ether consistency or flat out speed. Both are achieved best by a electric fuel pump. There consistent on keeping the fuel there, more reliable bowl fueling and making more power. That’s just the bottom line, sorry.
             
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            • RustyRatRod

              RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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              I would certainly try one. I think without a return it would be enough. Might be enough with one, never know till you try it.
               
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              • 318willrun

                318willrun Utube channel 318willrun

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                There does come a time, but his stock block 318 with 302 heads, 625 carb and his cam isn't the time of demand. Certainly nothing wrong with upgrading it, but at his build he won't "need" it. I've had more motor and used the stock fuel pump with factory 5/16 fuel line without issue. Many times in fact.
                 
                Last edited: May 13, 2022
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                • RustyRatRod

                  RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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                  The gear was my only concern. Couple that with a return and it could run into trouble with a stock pump.
                   
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                  • 72DMag

                    72DMag Well-Known Member

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                    Should clarify few things. By drag racing the car I mean street/sportsman class. It's not a tight competition class. I'm possibly thinking about exhaust mufflers and drive car around in the future so mechanical pump is alot quieter than electric. I think I'll try stock pump and just see how she does and go from there. The car was upgraded to 8an fuel line and iirc that is 1/2".
                     
                  • Darter6

                    Darter6 Well-Known Member

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                    72DMag, Just a thought. How about a booster pump on a switch.
                    Holley makes a Mighty Mite pump in 1.5-4 psi,4-7 psi and 7-10 psi.
                    I have been using these for years on street/strip cars. I have the 1.5-4 psi on my 63 (318) now using the mechanical pump and switching on the electric when necessary. For a test I removed the mechanical pump to see if the Might Mite (1.5-4 psi)would run a 360 4bbl Thermo Quad Cordoba on the street and it did the job.Wide open passes not a problem.
                    Holley, Mr.Gasket, K&N all have them,they are rebranded same pump. Only about $50.
                    Again Just a thought. Oh one more thing. When the engine is running you can't hear them running.
                     
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                    • Garrett Ellison

                      Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

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                      Right on @Darter6. I use one of the mighty mite style “click clack” pumps in line with the stock mechanical fuel pump. It’s worth about a half pound of extra fuel pressure at idle and and a little over a pound at 4,000 rpm. I’ve got it hardwired into a switch on the dash. You only have to run it when you think you need it. You’ll have plenty of fuel flow for your deal.
                       
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                      • thesiren74

                        thesiren74 Well-Known Member

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                        All I ever used was stock pumps with 3/8 lines.
                         
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