Moddoo

iTrader: (4)

Hey guys,
I am installing my 42s tonight.
can anyone share an hptuners tune with all of the injector values correct for the 42# injectors?

I am unsure of the pulse settings specifically.

Thanks in advance



EDIT:
Been searching some more and found this info on the injectors.
Just to clarify what I've got.

Here are the specs on the injectors:
Delphi Multec 43# injectors Part # 17113739

Static flow @ 37.95lb/hr @ 43.5PSI / 300KPa (4.31 g/s = 398cc/min)
Static flow @ 43.82lb/hr @ 58PSI / 400KPa (4.97 g/s = 460cc/min) *
Dynamic flow (2.0ms/10.0 ms(pulse width / rep rate)) 6.0 lb/hr @ 43.5PSI (0.748 g/s @ 300KPa)
Coil Resistance: High Impedance / High-Z (No ECM driver modifications required)
Ball/Seat Design with 3-Hole Diffuser Disc - Pencil stream

Gordy M

iTrader: (2)

If those are the 8.1 Marine injectors I believe there flow rate is 43 lb/hr at standard 43.5 psi rail pressure. At the 58 rail pressure they would flow about 50 lb/hr

kbracing96

iTrader: (26)

No, the marine injectors are rated at 43lbs at 4bar.

If you need the IFR spread sheet, let me know your email and I'll send it to ya. It won't let me attach an excel doc.

Moddoo

iTrader: (4)

Thanks KB, PMd you.

Mort

Hi Moddo try out this excel file by redhardsupra.

foff667

iTrader: (1)

Wouldn't he just put in 43.82 for all cells in the IFR table with a returnless fuel system? As long as he's running 58psi at the rail of course.

Moddoo

iTrader: (4)

Got it guys.
Multiplied my stock flow rate vs. KPA by 1.685 (43.82/26) still unsure of the exact stock injector flow rate though, maybe 26.4#/hr?
Also took 12% from the offset vs. volts table (found this info about these injectors from someone on hpt forum) seems to work well.
Truck started up and idled perfectly after a few seconds of running the air out of the rails.
Drove like normal also.
Fuel trims were pretty much right on. WOT still about 890 Mv.
Wideband should be here tomorrow.

Thanks for chiming in.

I looked at the excel file, but was a bit confused (tired), so I will look at it again later.

kbracing96

iTrader: (26)

No, it should be sloped, like the fbodys cuz it's not a vac referenced pressure reg from 04+ with the return-less systems.

RED04REGENCYRST

iTrader: (11)

hey guys im tryin to do this myself. i just put 42# in and im a newb at this. can you guys help explian this to me alittle more. TIA

RED04REGENCYRST

iTrader: (11)

okay i got to playing around with this alittle more. when i pull up my stock flow vs kpa table it is a flat table. but when i went to retune the tuner put a sloped table in, and the truck is showing lean(+3 to +8) around idle and then just a touch rich(-2 to -3) up higher. im at work so ill put up a scan later on.

my question is could this be due to the tuner going from a flat table to a sloped table?