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EFI Fuel Pump Options

Discussion in 'TBI & EFI Conversions' started by TravisB, Jun 7, 2019.

  1. TravisB

    TravisB Full Access Member

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    Hi guys. I wanted to gauge some interest on here and get some ideas about what you can do when LS swapping in a c10.

    I am aware of the 87 tank and sending unit route with the EP381 pump. This appears to be the most common route that I have seen taken in the threads I have read.

    However, are there other options? Cheaper options? Why is this one so popular? Why wouldn't a pump and filter plumbed in the original line not be more economical? I am just shopping around for ideas at this point.
     
  2. 4WDKC

    4WDKC Full Access Member

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    that is a factory replacement pump that meets the flow and pressure needed for a stock style swap. Internal pumps are nice because the gas keeps the pump cool and they are much harder to hear while driving. There are cheaper pumps that fit but do not supply enough pressure or gph of fuel. go look up prices on an external pump that is rated for 60 psi chances are they are not cheaper and probably much louder than in tank pumps. If you dont want to do dual pumps you could convert to the blazer tank and pump set up.. not sure its any cheaper.
     
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  3. bucket

    bucket Super Moderator Staff Member

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    Also, the non-baffled tanks used in the carb years can starve the pump of fuel and drastically shorten it's life. The long, narrow tank design has a lot of fuel slosh, so you would need to keep the level above 1/4 or more to keep the pump happy.
     
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  4. Gvpdbish

    Gvpdbish Junior Member

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  5. Gvpdbish

    Gvpdbish Junior Member

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  6. Frankenchevy

    Frankenchevy Supporting Member Supporting Member

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    This has been discussed extensively before. The most simple and effective way is to run 1987 tanks with an ACDelco ep381 or Delphi 0114. Simple and done.
     
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  7. dhenderz

    dhenderz Full Access Member

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    Holley just introduced this system for the 73 - 87 trucks. There are others who make similar retrofit systems, but this one is less money and can be used on the pre-87 tanks without baffles. I already purchased a model year correct (ie: non-baffled) tank for my 1977. I was planning to run a carb. But then decided to go with EFI. So I was stuck with making a decision on scrapping the brand new tank in order to upgrade to the 87 baffled version or one of the aftermarket systems with the in-tank pick up mats that prevent starvation. It was a tough choice because the costs, all in, was about the same either route. Now with this Holley system the math makes more sense to keep the non-baffled tank and just drop this system in...

    https://www.holley.com/products/fue...uel_pumps/muscle_car_efi_modules/parts/12-308
     
  8. bluex

    bluex Full Access Member

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    A brand new baffled 87 tank, sending unit, fuel filter and a Ep381 cost about $215 from Rock Auto. The main benefit to using those parts is they are readily available at most any parts store should you have an issue.

    I drive my truck alot an on long trips so easy to get replacement parts are my main motivation when I'm doing something like this. I also ran all -AN lines an with the above tank setup, fittings/adapters and the line I have about $450 total in my fuel system.

    Even with that hydramat thing i would still be worried about running it below 1/4. There's just to much slosh in a 73-87 tank imo.
     
    Last edited: Sep 22, 2019
  9. Wyttrash

    Wyttrash Junior Member

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    I came to this website for answers and it appears I’ve found them! I have an 83 with newer tanks, but not tanks for an 87. I also have a 91 Suburban tank and fuel sender. Would the pump in this Suburban tank be sufficient for a Holley Sniper or Fast efi system? Or does it need that EP381 pump? Thanks!
     
  10. Frankenchevy

    Frankenchevy Supporting Member Supporting Member

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    Tbi pump (87-95) won’t work. Needs to be vortec era or newer (96+).
     
  11. Wyttrash

    Wyttrash Junior Member

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    Beautiful, thank you. And do I use the Vortec pump with the 91 Suburban sender? Or a complete Vortec pump and sending unit?
     
  12. Frankenchevy

    Frankenchevy Supporting Member Supporting Member

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    The vortec pumps will hang on the tbi sender perfectly.
     
  13. Wyttrash

    Wyttrash Junior Member

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    Thank you!
     
  14. Gvpdbish

    Gvpdbish Junior Member

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    Question...are the flanges the same size? If not is there a flange kit for adapting to a larger opening? Thanks
     
  15. Frankenchevy

    Frankenchevy Supporting Member Supporting Member

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    What flange are you referring to? The sender is the same and the nipple on the fuel pump is the same or close enough to the sender’s line.

    All you need is the 87 tank, 87 sender, efi pump a small piece of high pressure fuel line to connect the pump to the sender and a couple of fuel injection hose clamps. All the external fuel lines need to be adequate for 60psi+. I used NiCopp hardlines and Earl’s hose where necessary.
     

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