[Gmecm] Re: Gmecm Digest, Vol 16, Issue 10

[William Lucke]

APEX'i Power FC's are built along this line... pin/pin compatible with 
various OE ECM's, but programmable and with more "performance" oriented 
features. They are almost exclusively for Japanese imports, though. A 
friend has one in his turbo MR2 Spyder. It's an interesting gizmo. It's 
more limited than hacking a GM computer, but it gets the job done nicely.

DSMLink is a hack of the factory computer for DSM's (Eagle Talons, Mitsu 
Eclipses) that makes the factory computer reasonably tunable, although 
again, this does not have the capability of a hacked GM computer.




Will

> From: charles at taildragger.info
> Subject: RE: [Gmecm] Acquiring ECM schematic
> 
> Seems like there'd be a market for new ECM's that connect to all the
> factory wiring, but use modern electronics.  Plus maybe do things a little
> better (bigger BLM map, etc.) and with better instrumentation.
> 
> I don't think there's anything like this though, is there?  I mean,
> besides DIY plans.
> 
>> Wow, I did not know that.  I can't imagine going through a 4 layer board,
>> and worse, trying to figure out what IC does what.
>>
>> Who would you suggest I request information from?  Delphi?  Who built
>> their early 90's OBDI ECM's?
>>
>> As sort of an aside, GM stopped making/supporting the 1228331 ECM found on
>> ZR1 vettes and the turbo lotus.  There was another part # that superceeded
>> it, but I believe it too had been discontinued.  What are those people to
>> do?  They don't exist in junkyards (I've looked), and there's *one* on
>> ebay for nearly $600.  If GM doesn't release the schematic for it,
>> wouldn't they be out of luck?
>>
>> This secretive environment is just terrible.  These things are approaching
>> 15-20 years old now.
>>
>>
>>
>> davesnothereman at netscape.net wrote: Ryan Hess  wrote:
>>
>>> Question: how have ECM schematics been acquired in the past? ???the
>>> 7730/49 on ludis' site, etc?
>> Old fashioned reverse engineering.
>>
>>> I'm in contact with an ECM remanufacturer, who
>>> presumably has a great deal of knowledge locked away somewhere. ???The
>>> question is, how do I coerce it out of them? ???
>> Maybe you should request information as an ecm remanufacturer?  There are
>> a few rebuilders, they must have obtained information in some way.
>> I'm specifically looking
>>> for a schematic of a '2240.
>>>
>>>
>>> I have to assume this is like the TV repair business, where the mfr
>>> charges a fee for access to their schematics..
>> They may not release schematics at all.  GM is a provider of rebuilt
>> ecm's.  They have no need to support the business of repairing and
>> rebuilding computers.
>>
>> I know that it's easier to pull a hen's teeth than obtain Delco service
>> information for audio products, even those which are 15 years old.  And
>> once you get service info, finding parts is even tougher.
>>
>> Zaphod