Stock HPFP flow rate / capacity

[metroplex]

Does anyone have the specs on the factory HPFP for the transverse EcoBoost or maybe the F150 EcoBoost 3.5? I'm trying to find it so I can calculate the max amount of ethanol I could add.

[02reaper]

This was posted a couple of years ago on another site for the f150 3.5 ecoboost.

Based on the data from Ford the HPFP is capable of flowing a maximum of the following fuel volume in lb/hr vs RPM:
RPM - LB/HR
500 - 30.1606
1000 - 60.3211
1500 - 90.4817
2000 - 120.6423
2500 - 150.8028
3000 - 180.9634
3500 - 211.1239
4000 - 241.2845
4500 - 271.4451
5000 - 301.6056
5500 - 331.7662
6000 - 361.9268

It is RPM based since the HPFP flows x volume per cam revolution.
Given the flow rate you can calculate the Max BHP attainable (without draining the fuel rails) vs RPM.

[metroplex]

Thanks Wes!
Any ideas on the stock injector sizing/flow?
I recall reading that dropping below 1200 psi means the HPFP is not able to keep up with the demand, but I never saw any math indicating this.

[metroplex]

Based on those numbers, it would support E85 based on the airflow limits of the stock turbos on the 3.5 (transverse and longitudinal) EB engines. I know for a fact when I ran the increased boost (pushing the airflow limit) using E10 93-octane on my SHO, any lambda below 0.82 or so would result in my HPFP dropping very low and insufficient fuel flow errors popping up. This would mean the transverse 3.5's HPFP has far less flow than the F-150's HPFP... or the other parts of the system are lower capacity as well (LPFP, injectors).

[02reaper]

Thanks Wes!
Any ideas on the stock injector sizing/flow?
I recall reading that dropping below 1200 psi means the HPFP is not able to keep up with the demand, but I never saw any math indicating this.

I haven't seen anything on the injector size. From what I recall reading, you will run out of pump before injector.

[zfgracing]

fuel pump mass flow rates and support air flow rates. This only applies to the fuel stated in the document.

I calc'd this for every ecoboost supported by HPT. It's all in my FB group.

https://www.facebook.com/groups/2289...83621/?fref=nf

[zfgracing]

I haven't seen anything on the injector size. From what I recall reading, you will run out of pump before injector.

Injector size isn't relevant like you think it is and neither is lpfp size. You can get more out of the injectors by increasing the injection window and pressure. and no the HPFP cannot support e85 to the limits of the turbos. The stock HPFP cannot even support the limits of the stock turbos (int the 2500-3500 rpm range) on pump gas let alone e85. Remeber the fuel pump is driven of the cam and the max flow is dependent on engine rpm. For example at 3000 rpm the and a lamba of .85 the SHO HPFP can only supply 2.44lbm/min of fuel or enough to support 29lbm/min of air, your turbos on the other hand are capable of 45plus lbm/min overall. The HPFP pump is a positive displacement pump not a centrifugal pump like a normal fuel pump so you have to apply positive displacement pump principles to the system.

On my truck I've out run the fuel pump from 2500-3500 rpm and had to find that balance. My truck is set to pretty much ride the line of what is supported all the way to shift point and I reach a peak air flow of 49lbm/min or pretty much all the turbos have.

[metroplex]

Any progress on your tuning for the VE tables on the RTR pump?

I have a friend with a new Focus RS that wants to tune it up for E85. I figure they would run into the same problems with not having enough HPFP for the increased airflow and E85 fueling. The rest of the system ought to be good for E85.