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Thread: 16147060 $85 Superceeded to $D8

  1. #46
    EFI GearHead ! EagleMark's Avatar
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    Pretty easy to do via BLM, WB would help on PE for accuracy.

    Is this your 1991 Suburban? If it's a towing torque monster you'll be fine. These PCM Injector Duty Cycle to go static 100% around 3500 RPM. Even stock engines in trucks seem to run out of VE at stock pressure.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  2. #47
    Fuel Injected!
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    Quote Originally Posted by EagleMark View Post
    Pretty easy to do via BLM, WB would help on PE for accuracy.

    Is this your 1991 Suburban? If it's a towing torque monster you'll be fine. These PCM Injector Duty Cycle to go static 100% around 3500 RPM. Even stock engines in trucks seem to run out of VE at stock pressure.
    Mark,
    This seems to be true as you have seen my datologs showing that.

    However, I believe in PE mode, fuel is still added. you can see the 02 sensor peg at .900mv even when the injector supposedly goes static. Why/How is this done? Async flag still is off?

    thoughts?

    edit: I guess i'm not static after all. Remember when you did the idc calculation fix? I'm only hitting 81%IDC and 7.0BPW
    Last edited by chevmasta; 04-02-2013 at 05:52 AM.

  3. #48
    Fuel Injected! 1BadAction's Avatar
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    Quote Originally Posted by EagleMark View Post
    Pretty easy to do via BLM, WB would help on PE for accuracy.

    Is this your 1991 Suburban? If it's a towing torque monster you'll be fine. These PCM Injector Duty Cycle to go static 100% around 3500 RPM. Even stock engines in trucks seem to run out of VE at stock pressure.
    Yes, this is my 91 Burb. 266HR Roller cam and 9.5ish compression with dome pistons and cleaned up peanut port heads. Doing the math, I figured I could go to 18PSI and have enough headroom for WOT, but my main goal for this weekend is to clean up the low RPM VE table so it's not fouling plugs rich while idling and driving normally. Then I can go from there. It has a fresh pump in it. Noisy as hell, but seems to be strong. :)
    2010 Porsche Cayenne GTS - DD
    1991 2500 Suburban - 454ci BBC tow monster
    1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac

  4. #49
    EFI GearHead ! EagleMark's Avatar
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    When it enters PE the calculation for BPW changes to new AFR, so more fuel. But available on time is still the same, as RPM increases available time get's shorter. 7.1 BPW is about 85% IDC at 3600 RPM, but the same 7.1 BPW at 4600 RPM is 108% IDC

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

  5. #50
    EFI GearHead ! EagleMark's Avatar
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    Quote Originally Posted by 1BadAction View Post
    It has a fresh pump in it. Noisy as hell, but seems to be strong. :)
    Vane drive pumps are better but noisier... not bad in tank, but man do they whine external...

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

  6. #51
    Electronic Ignition! Hillbilly's Avatar
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    My mind is now blown. I spent a year trying to burn a new chip for my '92 k2500 and couldn't figure out what I was doing wrong. Perfect timing, too, since I just rebuilt the motor. Any advice for me, I'm still a tuning virgin technically lol. I'm a bit of a nerd tho so I should catch on fast once I get burn to actually work. 357-flat top pistons, ported stock truck heads, 2.02/1.60 valves, summit 1103 cam(288/298 duration, .444/.466 lift) roller rockers, torker2 carb intake, 454 tbi (I got 65# and 80# injectors) and short tube headers (for now). 4l80e stock trans, 4.10 geared 14bolt.

  7. #52
    Super Moderator dave w's Avatar
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    Quote Originally Posted by Hillbilly View Post
    My mind is now blown. I spent a year trying to burn a new chip for my '92 k2500 and couldn't figure out what I was doing wrong. Perfect timing, too, since I just rebuilt the motor. Any advice for me, I'm still a tuning virgin technically lol. I'm a bit of a nerd tho so I should catch on fast once I get burn to actually work. 357-flat top pistons, ported stock truck heads, 2.02/1.60 valves, summit 1103 cam(288/298 duration, .444/.466 lift) roller rockers, torker2 carb intake, 454 tbi (I got 65# and 80# injectors) and short tube headers (for now). 4l80e stock trans, 4.10 geared 14bolt.
    I think using a Moates.net Ostrich 2 would be an option to consider? https://www.moates.net/ostrich-20-th...eed-p-169.html

    No need for chip burning equipment. Just upload the binary (.bin) file from TunerPro RT. The Ostrich 2 can be "flashed" while driving!

    dave w

  8. #53
    Fuel Injected! dktool's Avatar
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    Is eaglemark or sixshooter still around or did I miss them by 4 years ?

    Last edited by dktool; 10-14-2016 at 11:12 PM.

  9. #54
    Fuel Injected! dktool's Avatar
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    ....

  10. #55
    Fuel Injected! 1BadAction's Avatar
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    Quote Originally Posted by dktool View Post
    Is eaglemark or sixshooter still around or did I miss them by 4 years ?

    Eaglemark isn't with us anymore, sixshooter is rolling around here somewhere I think, but it seems since Mark left us it's gotten real quiet
    2010 Porsche Cayenne GTS - DD
    1991 2500 Suburban - 454ci BBC tow monster
    1979 16' Action Marine/"Johnny Cash" Merc Bridgeport Champ Motor - Metalflake Maniac

  11. #56
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    it seems since Mark left us it's gotten real quiet
    Sadly it has. In addition to Mark's passing, my job now requires many hours and my family seems to get much of the rest of my free time. I miss the fun of playing with cars and EFI. :(

    But I do appreciate the all help from the folks who watch the board daily.

  12. #57
    Super Moderator dave w's Avatar
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    I'm in a similar time crunch as 1project2many. I keep an eye (keyboard) on the site as best I can.

    dave w

  13. #58
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    X3, I'd love to spend more time finishing my current projects(and helping out others where I can) let alone starting new ones, but it's really difficult as it is with our work schedules now.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  14. #59
    Carb and Points!
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    Maybe it is useful to somebody

    AWBP $85 5,7TBI 4L80 1991 V2500 Suburban
    AWTU $D8 5,7TBI 4l80 (stock chip w/o EGR and О2-sensor)
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