FINAL RESULTS ARE IN!!! Flow test of all LPFP options currently available...

[Ecoboost_xsport]

Not quite sure where this post belonged, so I put it in the Performance section....could be in General or Maintenance, though. If it's in the wrong place...moderators, feel free to move it.

Finally getting around to conducting tests on all the different LPFP setups...

OEM, DW300c, Hellcat (Walbro 525) and my custom dual pump setup.

Here are a few teaser pics and some VERY preliminary results with the OEM and dual pump setup. Next up to be tested are the DW300c and Walbro 525. I can't get excited yet for the dual pump results without first seeing what the DW300c (most common LPFP mod) and the Walbro 525 flow. It might be a dud, lol (oh..and a royally expensive one, LOL). Red-bold values in the charts are where the OEM voltage output to the pump sits at during WOT.

I tested various voltages to simulate results for those wishing to use a boost-a-pump. Fluid being used for the test was e85 as that would be the likely candidate fuel for the dual pump setup.

Keep in mind these results are based on flows THROUGH the LPFP module (not the pump by itself), fuel filter, all fittings and bends, and with THIS particular test setup. The important numbers to look at are IMPROVEMENT over OEM, as flow within the vehicle could differ slightly. This test is an apples to apples comparison, trying to minimize variables. I'm unable to test thermal output (how hot they get while running), which would be another valuable data point (though AMP draw could be used to infer some generalizations of thermal output). My thermal imager took a dump on me a while back...

Full YT video in the works.

 

[Ecoboost_xsport]

Results are in!!!

Bottom Line Up Front:
1) Everyone should ditch the OEM as soon as you can and replace it with the DW300c, not for any flow increase, but for lower power consumption and more consistent tuning. The DW300c doesn't really flow any more than OEM (see post here), it just does it better.
2) I'm now hesitant to recommend the Walbro 525 because of it's power consumption and inability for the jet pump to keep up.
3) The dual pump is the way to go, but still requires further installation verification as well as finding ways to make it cheaper. It's currently just a one-off prototype. Stay tuned for a separate write-up and video for this.

The attached chart and graph images are available for download in PDF format from here:
LPFP test results in PDF format.

In addition to the charts above, here are the DW300c and Walbro 525:




Here are some graph comparisons:









Pros & Cons:

OEM:
Pros:
- Comes with the vehicle so no purchase is necessary.

Cons:
- Very inconsistent at all test points.
- Flowed nothing over 100PSI at any voltage in test setup.
- Not ideal for a boost-a-pump application.

DW300c:
Pros:
- Very consistent across all test points, making for better tuning.
- Relatively low cost.
- Only minor modification to fuel module.
- Easy to return to stock.
- Ideal for a boost-a-pump applications

Cons:
- Flowed nothing over 100PSI at any voltage in test setup.
- Flows about the same as OEM, so no significant increase in flow.

Walbro 525:
Pros:
- Increase of flow on average 49% across all test points.
- Very low cost.
- Highest dollar-to flow-increase gain.
- Easy to return to stock.

Cons:
- Flowed nothing over 100PSI at any voltage in test setup.
- Not ideal for a boost-a-pump application.
- Pump gets extremely hot.
- Moderate modification required to fit pump into fuel module.
- Draws significant current, heating power wire to dangerous levels.
- Jet pump is unable keep up, especially when the fuel level goes below the bucket. Must have a full-to-half tank at all times or modify the module.

Dual Pump:
Pros:
- Increase of flow on average 89% across all test points.
- Highest flowing capacity.
- Low current draw.
- Ideal for a boost-a-pump application.
- Only pump to flow past 100PSI in test setup.

Cons:
- High cost.
- Significant modification to fuel module.
- Requires “cloning” of FPDM signal.

 

[rubydist]

From a purely scientific standpoint, there is no statistically significant flow difference between the reported results for the oem pump and the DW300c pump.

 

[Ecoboost_xsport]

From a purely scientific standpoint, there is no statistically significant flow difference between the reported results for the oem pump and the DW300c pump.

Exactly what I wrote about in this post:

Did some flow testing comparing OEM to DW300c....you might be surprised what the results are.

In my efforts to flow test all the available options for the LPFP, I discovered something between the OEM and DW300c. I know I have another post documenting my flow testing process, but felt this one deserved it's own thread. It honestly doesn't look like the DW300c flows any more than the OEM...

shoforum.com

I'm sure, had I had a larger sample size, the results would've borne that theory out even more accurately.

There is a caveat....the DW300c was WAY more consistent and felt more "sure of itself" vs the OEM pump throughout all the testing I did. It also drew less current while flowing the same amount, which helps to keep the pump (and fuel) cooler. Those points are actually what I could say may make it a worthy investment still. Makes tuning more consistent as well. But yes....that thing isn't flowing any significant additional fuel over the OEM.

 

[toms89]

Big difference I noticed is the DW300c is very quiet. I could hear my OEM pump every time I opened the door, I do not hear the DW300c. Of course this may be because my OEM pump was failing?!

 

[Zpak]

Forgive me if I missed it, as I don’t know what your dual pump set up consisted of but have you considered something like Raceworks 2.8 litre twin pump surge tank kit with two Walbro 525lph fuel pumps? Just stumbled across that set up being used on a boosted Ford 4 liter v6 in a Falcon (fusion) running e85.

Side note, Australia gets all the cool Ford motors while we’re relegated to the scraps the EPA grants us permission to use.

 

[Ecoboost_xsport]

Yes, I've entertained the idea of a surge tank, but there are some inherent controlling issues as well as having it play nice with the stock fuel system and PCM that don't make it as easy as you think or S easy as just upgrading the LPFP. I wrote about a surge tank setup a few years ago on here that ended up not being very feasible. But I'm sure with tons of money it can be figured out. If you search my posts, im sure you can dig up my surge tank discussion as well as what my dual in-tank LPFP setup consists of.

 

[Zpak]

Right on. Just saw that on a mod list and thought it would be up your alley.