RE:Stock Fuel System Performance Diagnosis!

P

polskifacet

New member
Hey guys,
I am building a list of parts needed to complete a "performance" fuel line install. Any help would be appreciated. I will also put any tools I find required for testing etc here.

Fuel line upgrade:
3/8 female spring lock to -6 AN - Spring Lock Adapter
Russell -6 AN Proflex Hose - Russell Hose
Russell -6 AN 90 - Russell 90
Russell -6 AN Straight - Russell Straight
Russell -6 AN Coupler - Russell Coupler

Diagnostic tools:
OTC OTC518527 3/8 Hairpin adapter (Gives you standard schrader)

Putting together a "poor mans" adapter. Rather make my own that I know won't leak. For any fuel related hoses/fittings, you can use JIC fittings over the aluminum AN fittings. They are generally cheaper and much harder to strip etc (heavy duty).

Fuel line to NPT
 
Since I have a spare working LPFP I'm going to put it in a bucket of water and supply it 12 volts and measure the gpm. I don't think these numbers exist anywhere. I'll then repeat the process in the car and measure the gpm by removing the spring lock fitting going to the hpfp and compare results. That will save me replacing the line if the gpm is reasonably in spec.
 
What are you guys getting for WOT LPFP pressure? From the SCT logs mine starts out at about 108 PSI and goes down to about 96 PSI at the top of the rpm range.

FoMoCoSHO said:
I've been thinking there are fueling differences between the 2 gens of turbo SHO. I routinely see 2500+PSI at the rail....I've seen almost 2700 PSI a couple of times. This conflicts with Ford's stated max rail pressure of 2150 PSI and the experiences of other Ecoboosters here.

I found out some fuel system info from my buddy who works at the Ford dealership.

2013's have a different LPFP than the 2010-12's.

1st gen LPFP run at a fixed 65PSI

2013+ is variable that runs between 51 and 75 psi.

Taurus 2.0 ecoboost uses 2013 setup also.

Non Turbo 3.5 uses 2010-12 SHO fuel setup.

He said he will continue to research as he has time.

If anyone has any specific questions, let me know and I will ask him.
Click to expand...

Seems like my numbers are way off of the above.
 
polskifacet said:
What are you guys getting for WOT LPFP pressure? From the SCT logs mine starts out at about 108 PSI and goes down to about 96 PSI at the top of the rpm range.

FoMoCoSHO said:
I've been thinking there are fueling differences between the 2 gens of turbo SHO. I routinely see 2500+PSI at the rail....I've seen almost 2700 PSI a couple of times. This conflicts with Ford's stated max rail pressure of 2150 PSI and the experiences of other Ecoboosters here.

I found out some fuel system info from my buddy who works at the Ford dealership.

2013's have a different LPFP than the 2010-12's.

1st gen LPFP run at a fixed 65PSI

2013+ is variable that runs between 51 and 75 psi.

Taurus 2.0 ecoboost uses 2013 setup also.

Non Turbo 3.5 uses 2010-12 SHO fuel setup.

He said he will continue to research as he has time.

If anyone has any specific questions, let me know and I will ask him.
Click to expand...

Seems like my numbers are way off of the above.
Click to expand...
Not if your tuner has messed with your LPFP settings.

Your numbers are appropriate for HPFP input.

I'm pretty sure I looked at this in your logs and your LPFP seemed perfectly healthy.
 
On the lms 87 3bar which is only trans mods and 3bar, at idle desired lpfp is 79.2 and the max desired is 89.2. I see actual hit 96 and after i let off wot it jumps to 108 for a second or two.
 
on the lms 93 v8 cold weather at idle desired is 71.7 and I see a max desired of 104 psi. Actual matches desired at idle and anytime some boost builds its pegged at 108psi actual.
 
I have done the volume test with my old pump and the results are:
2.6 Liters per 30 seconds so 82.44 GPH or 312 LPH

Note:this is at 0 PSI this is simply the transfer ability of the pump, for a horsepower calculator to be accurate, it would have to have this volume at 75-100 psi. I am assuming that it can support 75 PSI with this volume.

From various calculators this is more than enough for 420 crank horsepower, actually calculators say 700-750 hp possible.
 
Adding pictures for visual aid of how I tested. Also green is negative and red is positive. I fed it 12v 10 amps similar to what the car could provide.
FuelPumpTest.jpg

FuelPumpWires.jpg
 
Tested pressure 10 inches before the hpfp. Torque and SCT are wrong fuel pressure wise. The gauge showed 3 different pressures only. Idle was a solid 60 PSI. Spirited driving was solid at 90 psi. WOT was 80 psi.

Fgauge1.jpg

Fgauge2.jpg

Fgauge3.jpg
 
I dont know if i would say sct is wrong...it would read exactly what the cars sensors would say...and im not even sure if there is a sensor for the low pressure...it could be an inferred reading so that would be how ford extrapolates the value

Are you reading psig or psia?..im sure it makes a difference....the readings you said your gauge says looks normal...but i dont remember your low pressure to be a problem, just the high side
 
ahh well would be psig. also did the volume test and got 2.5 L for 30 seconds, perfect. I'm trying to go through every  possibility. I guess next step is swap hpfp from steelblue.
 
polskifacet said:
ahh well would be psig. I guess next step is swap hpfp from steelblue.
Click to expand...

Why didnt you do that early on?...considering it was your high pressure that was low?...i was thinking you already tried swapping the high pressure pump?
 
polskifacet said:
ahh well would be psig. also did the volume test and got 2.5 L for 30 seconds, perfect. I'm trying to go through every  possibility. I guess next step is swap hpfp from steelblue.
Click to expand...

If you want to purchase the HPFP let me know.. I am going to be out of pocket all next week.
 
I didn't swap the hpfp yet as the date on the pump is 2014 so I know it came new with the motor. I'm fairly confident that it won't matter but it's too big of a factor not to try it. Stealblue I guess you can email me your PayPal akotniewicz@gmail.com. What do I do next lol, send out the injectors for testing? I'm also confident that they are fine based on lambda and the camera test.
 
Great informative thread there Adam(polskifacet)that will surely help out the Ecoboost Community!!. Z  :thumb: :thumb:
 
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