0411 tune help for 7.4L

Jedc · Jul 5, 2024

I rebuilt the 454 in my 99' k3500. Mild improvements included .030 bore, a howards cam (.555/.555 218°/.226°) , headers, and southbay 42lbs@ 43.5 psi injectors. I got it to start right off and run using the original black box but it was really rich. I performed the 0411 swap and used a bin from 2002 express. Made what i thought were the basic adjustments with Tuner pro but it wont hardly run. Does someone have a bin file for a mildly modified 454 that i could get- or any input? All im seeing is 5.7 info.
Thanks

L31MaxExpress · Jul 6, 2024

Jedc said:
I rebuilt the 454 in my 99' k3500. Mild improvements included .030 bore, a howards cam (.555/.555 218°/.226°) , headers, and southbay 42lbs@ 43.5 psi injectors. I got it to start right off and run using the original black box but it was really rich. I performed the 0411 swap and used a bin from 2002 express. Made what i thought were the basic adjustments with Tuner pro but it wont hardly run. Does someone have a bin file for a mildly modified 454 that i could get- or any input? All im seeing is 5.7 info.
Thanks

I tuned one a few years ago. I started with the timing tables and VE tables for an 8100. It actually ran fairly well on the 350 tune.

Jedc · Jul 6, 2024

im going to go thru and verify all the wiring on the pin out. i Know that some of the descriptions on the spreadsheet were for the 8600 GVW and mine is 9600 so I don't know if that changes things much. I have tried leaving them as they were in the 350 to see if it would fire up, I tried using them from a 2002 suburban with a 8.1 and that would not run either.
It's my understanding that even if it needs a crank position relearn it should run.. Do you happen to have a bin file for tuner pro that you used?

0411 tune help for 7.4L

Jedc

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