Fore Triple Pump Fueling/HPT Questions

[AcceptableNebula]

I am installing a Fore Triple Pump setup with Radium Rails etc when the Twin turbo kit goes in. Although I was a Ford Technician 25 years ago, that was the last time I touched a Ford motor. Not sure if anyone can answer a few questions as I can't seem to find the answers. I will be able to see some of this info when my HPTuners arrives. In 2023 the MPVI1 no longer functions of course.

1. Does Ford use a PWM control to handle the stock fuel pump? If so, does anyone know the max amp draw it can handle? I would prefer to let the stock PCM handle fuel pressure and pulse the 525 primary pump, and I will do a dual Hobbs switch setup staged for pumps 2 and 3 or control them from my EBC outputs.

2. Does Ford stage the fuel pressure based on PE? My Z06 ran 50 on the low side and kicked it up to 70 in PE. I had to command 74 and set my FPR to 72 so when additional pumps kicked in, it wouldn't lower the output of pump 1 which the car controlled. If you dropped 10 psi below target it pulled timing and closed the throttle some.

3. Since it seems that the car uses Port and DI at different times during regular driving, does large port injectors hurt the drivability of the car?

I had +65% XDI injectors and was going to add port to my Z06. I bought FIC2000 LS3 EV6 injectors as they would only come on during WOT. Is that an issue using them on a Coyote? Can the stock PCM accept that size? I can buy a smaller set but I'd rather use these.

4. Is there a specific "hardware" to select when trying to read the tune file from a 2023? It asked me to select one with my old interface. Then I read on HPT's website the MPVI2 was the minimum requirement for 2023. I've never seen that before with GM vehicles.

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[engineermike]

1. Yes, PWM. I believe the stock fuse is 30 amps. If it's any comparison, lots of people are running a BAP on a DW400 on the stock wiring and fuse and it's fine.
2. Ford modulates the fuel pressure but not based on PE. It's a function of rail temp and rpm, but you can also control as a function of fuel flow.

3. You can go up significantly on the port injector size and it won't affect drivability. I've tuned a gen3 on ID1300's. You can change the DI/PI blend and it has basically no effect. You can idle on DI if you want; it just affects particulate emissions. You can also upgrade the GDI system if you want to run pump gas. It's very easy to manipulate the GDI control once you understand how it works.

 

[AcceptableNebula]

Thank you for the responses @engineermike

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