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Thread: 1994 GMC C6000 Topkick C6H042 6.0 L V-8 Gas 225 gross HP 366 cu. in. Engine ADX??

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    Fuel Injected! phonedawgz's Avatar
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    1994 GMC C6000 Topkick C6H042 6.0 L V-8 Gas 225 gross HP 366 cu. in. Engine ADX??

    What is the proper ADX definition for a 1994 GMC C6000 Topkick C6H042 6.0 L V-8 Gas 225 gross HP 366 cu. in. engine?

    TBI, but no I don't know what the ECM is.

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    Fuel Injected! CamaroDude85's Avatar
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    If it has a 4L80E it's probably gonna be $0E.
    '88 Camaro 305tbi factory 5 speed car engine all stock except for Thrush(just like a flowmaster) muffler and open element air cleaner. LS1 brakes, wonder bar, Founders LCA/PHB & caster camber plates, Eibach springs, Hurst shifter, Ford 2 speed fan and 17's with 235's in front/275's out back. Running a 7427 $0d. rsmith085 over at TGO

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    1994 LS0 engine uses 16147525 with or without governor. If you read a cal we can determine the mask but chances are there's no def file in the light truck world that works.
    Last edited by 1project2many; 10-18-2012 at 08:29 AM.

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    EFI GearHead ! EagleMark's Avatar
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    I don't remember any 366/6.0L HD engines in ALDL file list...

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

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    A137 looks appropriate.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


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    Fuel Injected! phonedawgz's Avatar
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    Thanks

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    What is the proper ADX definition
    Apologies... thought you were asking for mask / XDF definition.

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    Super Moderator dave w's Avatar
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    This weekend I had the opportunity to work on one of these trucks, 1993 C6000. I though I'd share my experience. The 366 was replaced with a 454. I've attached the .bin file I read from the 16147525 ECM. I've also attached the .xdf and .adx for the 16147525. Maybe someone in the future will find this tread and this information will help.

    dave w
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    Fuel Injected!
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    That 366 is a BBC and its larger cousin in the 7.2 427 BBC. These are tall deck engines IIRC, asthey have the extra oil comntrol riing. They were dropped in 1998 for the L21 454 which is a Vortec 454 with a 24x relcutor crank signal/CNP ignition and ETC using the Vette ECM. Pretty much an overgrown LS1.
    Prelude to the GEN 7 8.1 BBC.

    peace
    Hog

  10. #10
    Electronic Ignition!
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    dave, i know this thread is 5 years old but i currently have one of these old uhaul trucks that i put a new gm 488 engine in . i could use some help on a tune for it. i currently am using the stock bdfz.bin file. i have turnercat software and have soldered in the new chip base. the issue i have right now is idle hunting and excessive rpm at idle(1000 to 1100 )set on 850 by chip
    . currently using 54 psi fuel pressure with 4degrees of timing.truck seams to run fine with that pressure but doesnt idle good and has a little backfiring issue too. i am a good mechanic but electronic stuff is still ahead of me.

  11. #11
    Super Moderator dave w's Avatar
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    I'm wondering if you changed the Base Pulse Width (BPW) Constant to correct for the new GM 488 (8.0 Liter) engine displacement? That attached .zip file has a BPW calculator for Throttle Body Fuel Injection (TBI).

    If the fuel injection system is still the ORIGINAL TBI system the BPW needs to be updated (reprogrammed into the chip) for the new larger 8.0 Liter engine displacement.

    To use the BPW calculator, you need to know the displacement and injector flow. We know the displacement of the new engine, 8.0 liters. Here is a link to find the information on injector flow: http://www.gearhead-efi.com/Fuel-Inj...d-part-numbers

    dave w
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    Electronic Ignition!
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    thanks dave. the calculation say to use bpw of 161. if i use that number can i return my fuel pressure to 32.at 54 now with bpw of 128.

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    Super Moderator dave w's Avatar
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    Quote Originally Posted by saturnrocket View Post
    thanks dave. the calculation say to use bpw of 161. if i use that number can i return my fuel pressure to 32.at 54 now with bpw of 128.
    Do you have Throttle Body Fuel Injection? Most all Throttle Body Fuel Injection systems use a fuel pressure of about 13 PSI, with the exception of some 94 - 95 7.4 liter engines that are about 28 PSI.

    dave w

  14. #14
    Electronic Ignition!
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    Yes mine is 28 to 32 psi with the original 366

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    Super Moderator dave w's Avatar
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    My plan would be to use the stock fuel pressure with the calculated BPW, and "Tune" the chip using TunerPro RT data logs. The attached TunerPro RT screen shots are from a 1227747 ECM not the 16147525. The tuning basics are the same for both the 16147525 and 1227747. Unfortunately the TunerPro RT .adx file for the 16147525 is not has developed as the .adx for the 1227747, so considerable homework is required to get the same looking screen shots from the 16147525 .adx file. The .adx file for the 16147525 is adequate for "Tuning" the 488 engine conversion.

    Once you post a data log from the 16147525, myself and other members can offer suggestions for "Tuning" the 488 engine conversion. Without a data log, the suggestions are mostly guessing what is needed to "Tune" the 488 engine conversion.

    dave w
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