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Electric or Mechanical Fuel Pump

Discussion in 'The Garage' started by PsRumors, Dec 12, 2006.

?

Electric or Mechanical Fuel Pump

  1. Electric

    23 vote(s)
    47.9%
  2. Mechanical

    25 vote(s)
    52.1%
  1. PsRumors

    PsRumors 1/2 ton status

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    454 is sitting in the burb. I am ready to start on the accessories. I am going with the Be-Cool aluminum radiator and electric fan kit. So I was thinking, should I use the mechanical fuel pump or electric? Neither of which I have.

    Thoughts?
     
  2. Chevy305

    Chevy305 6 Lug 14bsf Status Premium Member GMOTM Winner

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    carb or FI?

    Year?
     
  3. PsRumors

    PsRumors 1/2 ton status

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    '85 Carb
     
  4. DesertDueler2

    DesertDueler2 1/2 ton status

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    I like electric because it is easy to replace, and you dont have to worry about fuel getting into your crankcase.Dan
     
  5. gmc4cw

    gmc4cw 1/2 ton status GMOTM Winner

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    unless you go with an in tank pump. DON'T.

    Simple is better. unless your engine is exotic then mechanical or something readily available at most parts stores. that way if it quits on you in the middle of nowhere you can get a replacement.

    I have never replaced a fuel pump that I installed. they usually last a good while. but if the one in my truck does die I know that I can get a mechanical fuel pump for a 350 anywhere.
     
  6. zeroz400

    zeroz400 1/2 ton status

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    I say mechanical cuz they're easier and you dont need a regulator or any of that jazz.
     
  7. roadnotca

    roadnotca 3/4 ton status

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    A common reason for using an electric is to help prevent vapor-lock.
     
  8. PsRumors

    PsRumors 1/2 ton status

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    I had no idea that would help. I had a car once that was absolutely horrible about vapor locking. I ended up putting a heat resistive spacer between the carb and intake which cured the problem, but then I needed a hood due to space.
     
  9. roadnotca

    roadnotca 3/4 ton status

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    Gas coming out of the mech. pump, is warmer than gas going in. At idle, no air flow to speak of, plenty of time to warm-up. 115* in stop & go traffic; you've seen it before.:D
    No guarantee to prevent vapor-lock, just another source.
     
  10. PsRumors

    PsRumors 1/2 ton status

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    Makes since just never thought about it. Even when running a coil and fuel line cooler never thought about moving it away from the engine. Makes sense.
     
  11. lurtch-k20-(78-90)

    lurtch-k20-(78-90) Registered Member

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    I also have a 454 in my 78, with electric holley fuel pump
    and had a backup for those not so special moments. The wire end I installed sealed quick connect fittings, hose ends are regular hose clamps. I also installed a valve after the pump if I needed gas, (for someone who neglected to check fuel level before a drive about, or to clean parts on the trail after breakage). Although I am curious to see what everyone has to say about the pole.
     
  12. PsRumors

    PsRumors 1/2 ton status

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    Now that is a pretty good idea. What kind of valve did you use?
     
  13. Cmoe

    Cmoe 1/2 ton status

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    Something else to think about is where to mount it.... posible damage on rocks.... If your running an internal elect. their quite if your running an external elect. they make a lot of noise.... The mech. is quite too.... On my 74 there is an external elect. and it make the truck as load as my 78 with dual 40 flowmasters.... just more to think about.... I do like the idea of having a elect to use as a parts cleaner
     
  14. lurtch-k20-(78-90)

    lurtch-k20-(78-90) Registered Member

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    regular 3\8 ball valve doubled up w/ a brass natural gas valve
     
  15. longbedder

    longbedder 1/2 ton status Premium Member

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    For a carbed engine you are fine with a mechanical fuel pump. Those things are pretty darn reliable and quiet.
     
  16. blazinzuk

    blazinzuk Buzzbox voodoo Premium Member GMOTM Winner

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    I voted electrical, mainly for the very small reason of keeping the fuel cooler. But don't buy some some cheap electric pump buy a nice one. some of the newer externals are pretty quite. For simplicitys sake a mechanical can't be beat. I would go electric because in my mind it may help performance a bit.
     
  17. PsRumors

    PsRumors 1/2 ton status

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    Well, I ended up with a mechanical for now. I am trying to get the thing running so I can get it to the muffler shop Friday morning.

    An electrical will come at a later date but so will alot of other things.

    Thanks for the input.
     
  18. gmc4cw

    gmc4cw 1/2 ton status GMOTM Winner

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    I tell myself that all the time when I am fixing something to just get it moving. I will upgrade this or that. then 8 years later when you haven't thought twice about that mechanical pump. I have all sorts of parts that I plan on puttting on my truck, but dammit, the stuff on there now works.
     
  19. JEBSR

    JEBSR 1/2 ton status

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    Mechanical is cheaper, more reliable, and requires no modification to wiring or fuel lines to run. With that said IMO go mechanical.
     
  20. roadnotca

    roadnotca 3/4 ton status

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    :haha: I'm waiting for the Wife to surprise me (maybe Christmas morning?) by installing my new hi-output alternator, some night between 10 PM and 4 AM????? :rotfl:

    Maybe its waiting to be painted ORANGE? :haha:
     

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