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Thread: 5235231 injector offset

  1. #1
    Fuel Injected! Snowwebs's Avatar
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    Question 5235231 injector offset

    Anyone have the offsets for red/blue 5235231 80 pph injectors?
    I swapped them in as a replacement for the pink/purple 17104288 46 pph ones after a stroker build.

  2. #2
    Super Moderator dave w's Avatar
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    The link below has .bin file AFTK which should have the 5235231 Injector Offsets. The link below also has the TunerPro $42 .xdf definition for the AFTK .bin file.

    http://www.gearhead-efi.com/Fuel-Inj...Information-42

    dave w

  3. #3
    Fuel Injected! Snowwebs's Avatar
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    Thanks so much Dave!!, I believe that is just what I needed. I figured the information was on here some where I just could not find it.

  4. #4
    Fuel Injected! Snowwebs's Avatar
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    OK so I ran $42-1227747-V5.9.3 to see the bin, I didn't see injector offset, but I did find injector correction multiplier. do I just use that table somehow to modify mine?
    I'm running - Advanced $31 TP5 v250, a BMHM bin file on a 7427.
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    Last edited by Snowwebs; 07-11-2019 at 06:53 PM.

  5. #5
    Super Moderator dave w's Avatar
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    The injector parameters $42 vs. $31 is not a direct crossover. Maybe the early 93 $31 7.4 liter injector parameters will get you close enough to tune, just use the 5235231 injector flow in the $31 .bin file.

    17084304 - Black / Blue - 74pph - 7.4L / 454 - 91-93

    5235231 - Red / Blue - 80pph - 7.4L / 454 - 88-90

    dave w

  6. #6
    Fuel Injected! Snowwebs's Avatar
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    I thought the $31 mask was only used in 95's?
    I found a 7.4 bin for an $0E mask but it had the same offsets as my $31, from what I can tell the earlier 7.4 were either a $42 $4f $99 or a $85 all of which do not look to crossover an offset to a $31.
    I did find a "93 stage 1, 7.4" (probably one of the Harris chips) but it showed bad data in $31, $0D and $0E masks.
    I cant find any bin for an early 93 $31 7.4.
    but I'm pretty new to all this so I may just not know where to look?

    Thank you so much for your help.
    Ken

  7. #7
    Fuel Injected!
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    I never did change mine because of this exact issue. I don't have a clue as to how to correlate the tables from $42 to usec values.
    1995 K1500, Cadillac 500 TBI with 4L80E swap. 7427 PCM and 454 TBI.

  8. #8
    Fuel Injected! Snowwebs's Avatar
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    Well that's a little discouraging!! LOL.
    I can drop ten psi of fuel pressure with the swap, but tuning has been interesting. BLM numbers never really calms down.

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