Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Results 1 to 8 of 8

Thread: possible 27SF512 chip replacement

  1. #1
    Electronic Ignition!
    Join Date
    Mar 2014
    Age
    23
    Posts
    18

    possible 27SF512 chip replacement

    Hey guys, I've been doing some hunting online and came across something interesting. Everyone that has tried burning chips knows our beloved SST 27SF512 is not readily available, people are even reporting issues with the ones sold by Moates. However, while reading through this datasheet I found a PLCC-32 chip that may be a good replacement with an adapter. They are still available and commonly used for BIOS on computers, plus a fair bit more memory, the AMD 29F040. Anybody see any issues with this? here is the datasheet that got me thinking. http://www.futurlec.com/Memory/SST27SF512.shtml
    -Josh

  2. #2
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Don't want to sidetrack your conversation so consider this a temporary hijck...

    I've not had any issues with the Moates 27SF512 chip yet and can't remember anyone here having reported issues either?

    Back to new chip idea...

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

  3. #3
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    Posts
    3,358
    There are several options for chips. The biggest drawback to some of the chips that can substitute the 27SF512 is the chip burning equipment. The Moates.net Burn 2 is a very affordable chip burning option. I own a Burn 2 and a BX32 Batupo II http://www.batronix.com/shop/program...rogrammer.html The BX32 Batupo II works great with all 27SF512 variants, including the ones manufactured off-shore. When my Burn 2 won't flash one of the 27SF512 variants, the BX32 Batupo II will!! IMHO, it's the chip programmer being used that's causing many 27SF512 failures, not the chip. The BX32 Batupo II has an auto chip ID feature that makes it extremely easy to correctly program most any chip.

    dave w

  4. #4
    EFI GearHead ! EagleMark's Avatar
    Join Date
    Feb 2011
    Location
    North Idaho
    Age
    57
    Posts
    10,477
    Maybe that's why my AutoProm will sometimes not burn a chip but my GQ-4x will. The reason I got the Gq4x was it's ability to do the 2732a chip. But the list of supported chips is endless.

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

  5. #5
    Super Moderator
    Join Date
    Mar 2011
    Location
    Camden, MI
    Age
    28
    Posts
    3,026
    there are DIP-32 versions of the AM29F040, which i've been using almost exclusively for quite some time. generally, the only time i touch one of the SF512s is when i'm burning a finalized version of a tune.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  6. #6
    Electronic Ignition!
    Join Date
    Mar 2014
    Age
    23
    Posts
    18
    do you use a 28 or 32 pin adapter on that? And for that matter, tell us about it! How do you install it, what direction?
    This sounds like it could be a good lead, at least for my uses.
    -Josh

  7. #7
    Super Moderator
    Join Date
    Mar 2011
    Location
    Camden, MI
    Age
    28
    Posts
    3,026
    Moates sells them.... referred to as the "C3" chip. goes in a 32-pin ZIF adapter(G3), same orientation as a 27Cxxx, along with a 16-position hex encoder to run up to 16 BINs on a single PROM.

    you of course, don't need to go through that much complexity, you could just run a single BIN on them, but i would take advantage of the ability to run multiple.



    if i ever get this damn northstar MEMCAL adapter done, i'll be making my own with some other features to it.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  8. #8
    Electronic Ignition!
    Join Date
    Mar 2014
    Age
    23
    Posts
    18
    Ah, that is basically the same chip in a DIP format. I only question the PLCC32 variant due to it's availability and cost, plus ease of finding a programmer!

Similar Threads

  1. '7747 Flash Chip Conversion (27SF512)
    By dave w in forum Fuel Injection Writeups Articles and How to New and Old
    Replies: 56
    Last Post: 16 Hours Ago, 11:21 PM
  2. Replies: 58
    Last Post: 08-07-2013, 11:20 AM
  3. SST27SF512 replacement.
    By Six_Shooter in forum Other EFI systems and related topics
    Replies: 9
    Last Post: 04-18-2013, 08:44 PM
  4. 27sf512 chip mod for 24 pin?
    By jameslleary in forum GM EFI Systems
    Replies: 17
    Last Post: 06-03-2012, 11:52 AM
  5. '427 PCM - Memcal Mod for 27SF512 Chip
    By dave w in forum Fuel Injection Writeups Articles and How to New and Old
    Replies: 13
    Last Post: 04-19-2012, 02:24 PM

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
  •