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Thread: 7060 MPFI Conversion?

  1. #1
    Fuel Injected! 1BadAction's Avatar
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    7060 MPFI Conversion?

    What would it take to do this? Besides the intake, just wiring and bin changes? Or is it more involved?
    2010 Porsche Cayenne GTS - DD
    1991 2500 Suburban - 454ci BBC tow monster
    1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac

  2. #2
    Fuel Injected! 1BadAction's Avatar
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    From BobR in an email about this a year or so ago.

    If you want to give it a go, from memory: pin 56 on the MEMCAL gets grounded. This sets the injector firing rate. Short out the current sense resistor (disable peak-and-hold), then upgrade the injector drive MOSFET just to be sure it will handle the load.
    From this point out I'm curious about wiring.
    2010 Porsche Cayenne GTS - DD
    1991 2500 Suburban - 454ci BBC tow monster
    1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac

  3. #3
    EFI GearHead ! EagleMark's Avatar
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    IIRC the 8060 $85 was done MPFI before $0D... yup here's a link:
    http://www.thirdgen.org/techboard/di...-pfi-mode.html

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

  4. #4
    Fuel Injected! 1BadAction's Avatar
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    When it's tuned and running well I'm going to start looking into it more, but it looks very do-able. I just think I'm leaving a good bit of power on the table with the TBI.

    Either way I completely refuse to have 2 ECMs. That's so naff. :D
    2010 Porsche Cayenne GTS - DD
    1991 2500 Suburban - 454ci BBC tow monster
    1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac

  5. #5
    Fuel Injected!
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    IMHO , I would upgrade to the '7427 PCM before doing any MPFI conversion.

    I believe there is much more support and many people (including myself on 2 trucks) running it so a starting point would be easy to come by.

    I don't think just going MPFI with a PCM is leaving much on the table vs TBI , granted I love the way mine run with the conversion , just thonk I could have gotten there with the TBI .

    TOM
    1994 3500 Dually , 502 (509) , 264HR , Edelbrock MPFI , PFI '7427
    2006 Forest river-Sierra 37' 5th wheel
    1999 Astro Van, L31 Vortec , 4x4 conversion
    1994 Pontiac Sunbird "Work ride"
    1993 K-3500 "Ex-diesel" 454/4L80E - '7427
    1992 454SS "Eh Stock" , Blower & '7427 swap .
    1992 S-10 434 SBC/Tremec - '7427
    1984 S-10 , SAS, 496/700R4/205 , D44/14BFF -'7427
    1980 Z-28 454/700R4
    1977 Olds 98 Regency 403/700R4

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