1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Fuel pump starvation and transfer pump ideas - Brainstorm thread

Discussion in 'Performance and Tuning' started by VWTim, Sep 1, 2023.

  1. Sep 1, 2023 at 10:31 AM
    #1
    VWTim

    VWTim [OP] Mid-Travel Crew

    Joined:
    Mar 1, 2021
    Member:
    #59814
    Messages:
    627
    Gender:
    Male
    Corvallis, OR / Austin, TX
    A few posts in the SC thread have me thinking, it's been documented at 1/4 tank or below the pump loosing suction under hard acceleration. I also know our trucks (especially the 38 gal tank models) keep a large "reserve" capacity in the tank to make sure the pump is always fed. Changing my pump yesterday w/ the DW300 for my Harrop had me thinking of other ideas from past racing and other cars. This will not only help at low fuel levels, but allow me to comfortably use the "reserve" fuel when offroad and not on level terrain.

    The fuel pump "basket" functions as a partial surge tank, when I removed it, it doesn't drain out unless tipped to drain. This has me thinking of a transfer pump install when I swap to a 38 gallon (hopefully next time my tank comes down).

    The idea would be keep the stock basket intact as-is with the DW300 and add another submersible pump that will keep the basket full at all times by pulling fuel from the front and rear of the tank. I haven't looked into a pump yet, but that's the easy part. Bulkhead electrical terminal kits are available and the idea would be to utilize Walbro MP-12 or similar pucks installed inside the tank. This would be a secondary/redundant system to the OEM fueling that works just fine over 1/4 tank, on level ground, and up to reasonable HP goals. Something like (2) inline at the front of the tank, hard tubed to the transfer pump that's filling the basket with (2) more at the rear of the tank.

    This project is way down the road as work is sending me out of town for a while, but I wanted to talk through it and see what others may have done or are doing. Other than, just keeping the tank full.

    [​IMG]
     
    HulkSmurf14 likes this.
  2. Sep 1, 2023 at 1:00 PM
    #2
    Bprose

    Bprose Old member

    Joined:
    Jan 15, 2017
    Member:
    #5955
    Messages:
    1,562
    Gender:
    Male
    VA
    Vehicle:
    17 Tundra CM TRD
    Something like this maybe? IMG_3556.png
     
    HulkSmurf14 likes this.
  3. Sep 1, 2023 at 1:07 PM
    #3
    VWTim

    VWTim [OP] Mid-Travel Crew

    Joined:
    Mar 1, 2021
    Member:
    #59814
    Messages:
    627
    Gender:
    Male
    Corvallis, OR / Austin, TX
    That may work similarly to the Walbro ones, but not sure the inline pump would like it running dry. The Walbro's are supposed to have internal valves that the moment they suck air, then close flow and transfer suction to the others that are submerged. Thanks for the link, good to see what other parts are out there.
     
  4. Sep 1, 2023 at 1:10 PM
    #4
    Bprose

    Bprose Old member

    Joined:
    Jan 15, 2017
    Member:
    #5955
    Messages:
    1,562
    Gender:
    Male
    VA
    Vehicle:
    17 Tundra CM TRD
    I remember seeing it on a car show a couple years ago. Supposed to help with starvation when the fuel sloshes around. I have no idea if you could put an extension hose on new pump or if it could keep up with a higher volume pump.
     
  5. Sep 2, 2023 at 6:28 AM
    #5
    HulkSmurf14

    HulkSmurf14 ...Weighted Average...

    Joined:
    Aug 9, 2019
    Member:
    #34377
    Messages:
    2,124
    Gender:
    Male
    Vehicle:
    2014 Tundra Limited
    Tastefully enhanced...
    Have you found a used 38gal tank or are you buying new? After towing for 2k miles, I now find myself "needing" a 38gal tank...in my duramax days, I used a puck sump for a lift pump that was absolutely amazing...drill a hole in the bottom the tank and it was low profile (~1") and routed the hose appropriately to the lift pump...couldn't something be done like that?

    https://www.dieselpowerproducts.com...BoLYrYLzedPIUkhRVTZEEGAtESl6c6KMaAiV2EALw_wcB
     
    reywcms likes this.
  6. Sep 8, 2023 at 2:17 PM
    #6
    VWTim

    VWTim [OP] Mid-Travel Crew

    Joined:
    Mar 1, 2021
    Member:
    #59814
    Messages:
    627
    Gender:
    Male
    Corvallis, OR / Austin, TX
    I've been looking for a used tank casually, when I'm ready, I'll buy whatever I can get a hold of.

    That sump connection is pretty slick, but I'm trying to keep it all internal or at least not lose ground clearance. For a street truck, it would work great.

    I did find a couple Lemons racecar posts about using the Walbro pucks for a transfer pump system and sucking tanks down to 1 gallon remaining while on track.
     
    HulkSmurf14[QUOTED] likes this.
  7. Sep 20, 2023 at 8:52 PM
    #7
    Mdl

    Mdl Hey there...

    Joined:
    Jun 14, 2023
    Member:
    #98638
    Messages:
    1,691
    Gender:
    Male
    PNW, WA
    Vehicle:
    2007 TRD SC'd
    JBA Longtubes, Snivs 2.0 SC pulley, ASP crank overdrive pulley 6.71 in, DD Full 3inch dual exhaust, IPT valve body, Airbox mod, 4.5inch intake, Denso 750, 450 Walbro, W/M injection, GM 95mm TB, SABM, Camburg UCA, Icon shocks, DIY Traction Bars, Tuning by snivspeedshop.com
    @VWTim awhile back I purchased 3 walbro pucks. Plan was to have one in each rear corner and one inline a foot forward of the rear plumbed to canister. I ditched that and used the ffv canister with a walbro 450. The canister has a larger venturi system and a walbro 450 model 267 fits with no mod to canister. Found a half circle filter that fit bottom of canister. No issues running hard when I had about 3 gallons left before fill up.
     
    snivilous and HulkSmurf14 like this.
  8. Sep 21, 2023 at 6:30 AM
    #8
    VWTim

    VWTim [OP] Mid-Travel Crew

    Joined:
    Mar 1, 2021
    Member:
    #59814
    Messages:
    627
    Gender:
    Male
    Corvallis, OR / Austin, TX
    That's really good to hear, I'll have to track down a FFV canister to start playing with.
     
    Mdl[QUOTED] likes this.
  9. Sep 21, 2023 at 8:53 AM
    #9
    Mdl

    Mdl Hey there...

    Joined:
    Jun 14, 2023
    Member:
    #98638
    Messages:
    1,691
    Gender:
    Male
    PNW, WA
    Vehicle:
    2007 TRD SC'd
    JBA Longtubes, Snivs 2.0 SC pulley, ASP crank overdrive pulley 6.71 in, DD Full 3inch dual exhaust, IPT valve body, Airbox mod, 4.5inch intake, Denso 750, 450 Walbro, W/M injection, GM 95mm TB, SABM, Camburg UCA, Icon shocks, DIY Traction Bars, Tuning by snivspeedshop.com
    I used this as a reference and @Silver17 mentioned it being used by matt smith from fb group. Don't think @4firemandan has been around. https://www.tundras.com/threads/5-7-supercharged-e85-fuel-system-diy-project.101526/
    The supply and return are reversed and plug is towards back. The unused fuel port needs to be blocked. A quantum fuel systems filter fits the canister. You do have to trim the excess plastic. I wrapped it in painters tape to prevent contamination while trimmimg. https://www.amazon.com/HFP-S65-3-St...310217&sprefix=hfp+s65+quantum,aps,176&sr=8-3

    https://www.tundras.com/threads/general-supercharger-thread.85513/page-311#post-3238217 post 9301 from silver17.
     
    Silver17 and HulkSmurf14 like this.

Products Discussed in

To Top