Results 1 to 10 of 10

Thread: 24 to 28 pin adapter (G2)

  1. #1
    Fuel Injected!
    Join Date
    May 2011
    Location
    Pocono's PA.
    Age
    50
    Posts
    370

    24 to 28 pin adapter (G2)

    What exactally does the G2 do other than convert from a 24 to 28 pin chip ?

    What I mean is , does it internally short pins 1,2,28,27 and 26 on the board , or is their something else on the board .

    Reason I ask is I want to use my Autoprom on a 7747 today , and I would have to order a G2 to do so the proper way . Just wondering if I could make something up quick.

    Thanks

    TOM
    1994 3500 Dually , 502 (509) , 264HR , Edelbrock MPFI , PFI '7427
    1992 S-10 434 SBC/Tremec - '7427
    1986 Monte Carlo SS
    1984 S-10 , SAS, 496/700R4/205 , D44/14BFF -'7427
    1980 Z-28 496/700R4
    1979 Corvette 496/700R4
    1977 Olds 98 Regency 403/700R4

  2. #2
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    63
    Posts
    10,477
    Yes the G2 sets up the pins correctly for 28 pin chip.

    Quick is easy for 1227747 with AutoProm. Open AutoProm and move jumper from 28 to 24 pin.

    Then slide a 24 pin dip into stock chip location, or cut off couple pins from 28 pin dip and plug in the Zif socket.

    I have a 28 pin zif socket and 24 pin dip on bottom to slide into stock chip socket, extra pins from Zif are all clear. Then make sure you get red stripe lined up with pin one/notch.

    Then if you have burner and old UV erase chips you can install final tune in stock ECM.

    While we are here the picture on Moates website that indicates switch needs to be out for 160 Baud is wrong. If it is out you will apply 10K resistance and be in ALDL mode which really messes up idle and timing...

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

  3. #3
    Fuel Injected!
    Join Date
    May 2011
    Location
    Pocono's PA.
    Age
    50
    Posts
    370
    Quote Originally Posted by EagleMark View Post
    Yes the G2 sets up the pins correctly for 28 pin chip.

    Quick is easy for 1227747 with AutoProm. Open AutoProm and move jumper from 28 to 24 pin.

    Then slide a 24 pin dip into stock chip location, or cut off couple pins from 28 pin dip and plug in the Zif socket.

    I have a 28 pin zif socket and 24 pin dip on bottom to slide into stock chip socket, extra pins from Zif are all clear. Then make sure you get red stripe lined up with pin one/notch.

    Then if you have burner and old UV erase chips you can install final tune in stock ECM.

    While we are here the picture on Moates website that indicates switch needs to be out for 160 Baud is wrong. If it is out you will apply 10K resistance and be in ALDL mode which really messes up idle and timing...
    O.K. then ,

    I guess I have to ask , why is the G2 out there if it is this easy ........

    I moved the jumper to the 24 pin setting inside of the Autoprom , I modified a 28 pin dip socket to 24 pin to insert into the stock ECM and still take the Autoprom's 28 pin cable on top .

    Red stripe gets lined up with the pin 1 / notch on the modified dip socket . Will the Autoprom since it is now set to 24 pin now use only the correct 24 pins of the cable , it would go to reason it would but I just want to be sure as in thoery pins 13,14,15,16 of the original 28 pin termination will not connect to anything.

    Or am I just making this harder than it is ?

    Sorry for all of the questions , I can't remember the last time I played with a 7747 ..... Think I burned the chip with my Pocket programmer.......

    Thanks

    TOM
    1994 3500 Dually , 502 (509) , 264HR , Edelbrock MPFI , PFI '7427
    1992 S-10 434 SBC/Tremec - '7427
    1986 Monte Carlo SS
    1984 S-10 , SAS, 496/700R4/205 , D44/14BFF -'7427
    1980 Z-28 496/700R4
    1979 Corvette 496/700R4
    1977 Olds 98 Regency 403/700R4

  4. #4
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    63
    Posts
    10,477
    The G2 is there to get out of the UV erase chips. I'd guess if there was a 24 pin replacement EEPROM then this would never have happened?

    It's been awhile since I've done this but yes I think your making it harder then it is. Just line up red stripe to notch/Pin 1 and don't worry about extra 4 pins hanging out when jumper set to 24 pin.

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

  5. #5
    Fuel Injected!
    Join Date
    May 2011
    Location
    Pocono's PA.
    Age
    50
    Posts
    370
    Cool,

    Thanks again Mark

    TOM
    1994 3500 Dually , 502 (509) , 264HR , Edelbrock MPFI , PFI '7427
    1992 S-10 434 SBC/Tremec - '7427
    1986 Monte Carlo SS
    1984 S-10 , SAS, 496/700R4/205 , D44/14BFF -'7427
    1980 Z-28 496/700R4
    1979 Corvette 496/700R4
    1977 Olds 98 Regency 403/700R4

  6. #6
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    63
    Posts
    10,477
    Here's what I have, a 24 pin dip on back of a 28 pin zif and it plugs right into 1227747.



    Attached Images Attached Images

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

  7. #7
    Fuel Injected!
    Join Date
    May 2011
    Location
    Pocono's PA.
    Age
    50
    Posts
    370
    You operate your Autoprom in the center setting of the vertical switch for the 7747 ? (No connection between A-B)

    TOM
    1994 3500 Dually , 502 (509) , 264HR , Edelbrock MPFI , PFI '7427
    1992 S-10 434 SBC/Tremec - '7427
    1986 Monte Carlo SS
    1984 S-10 , SAS, 496/700R4/205 , D44/14BFF -'7427
    1980 Z-28 496/700R4
    1979 Corvette 496/700R4
    1977 Olds 98 Regency 403/700R4

  8. #8
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    63
    Posts
    10,477
    Quote Originally Posted by Nasty-Z View Post
    You operate your Autoprom in the center setting of the vertical switch for the 7747 ? (No connection between A-B)

    TOM
    Looking at switches, both to left. Left switch left, opisite of what AutoProm directions say or you will cause 10K resistence and be in ALDL mode which causes higer idle more timing and makes tuning impossible.

    Now this is all with 28 pin chip. So I don't know if the 160 baud position/10K is maybe needed to emulate 24 pin? Been awhile since I did this. I have an email into Moates about this to find out if that was needed from earlier days when AutoProm was not in an enclosure and people knew about the 24-28 pin jumper. Or it's just a mistake? Using 10K for 160 Baud on 28 pin is wrong! Using 10K to data log without emulation on stock 24 pin chip is wrong! I don't have time to test today or would have had it done by now...

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

  9. #9
    Carb and Points!
    Join Date
    Apr 2013
    Age
    47
    Posts
    8
    Quote Originally Posted by EagleMark View Post
    Looking at switches, both to left. Left switch left, opisite of what AutoProm directions say or you will cause 10K resistence and be in ALDL mode which causes higer idle more timing and makes tuning impossible.

    Now this is all with 28 pin chip. So I don't know if the 160 baud position/10K is maybe needed to emulate 24 pin? Been awhile since I did this. I have an email into Moates about this to find out if that was needed from earlier days when AutoProm was not in an enclosure and people knew about the 24-28 pin jumper. Or it's just a mistake? Using 10K for 160 Baud on 28 pin is wrong! Using 10K to data log without emulation on stock 24 pin chip is wrong! I don't have time to test today or would have had it done by now...
    Mark,
    Did you ever hear back from Moates on this? Also, my APU1 is the older model (Ver 1.7 from 2-13-15) with the firewire and it has a 3-way vertical switch and a 2-way horizontal switch. What settings should these be on?

    Thanks

  10. #10
    RIP EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    63
    Posts
    10,477
    I just don't know? Never had one. But I can say with the newer one you can do whatever you want with the switches and it won't hurt anything! Just won't work.

    Load the bin file, verify, emulate and turn key on= no start. CEL should come on, blink and stay on till you start motor then go off. If so emulation is working.

    If you get it emulating then check your ADX data log file and make sure ALDL is off, but since you have Corvette in your name and I don't know what ECM you using sometimes 10K is needed to flow data, then turn off.

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

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •