Newbie: Fiero ECM questions

[TK]

Interesting. I forgot about the older TBI cars. I've never looked back
before 85. Are you talking about the 749 tables being the same as the Fiero
tables? Or the program code. Maybe I should have said tables. I haven't
really looked at the program code that close.

Still interesting! When I looked at the Fiero cal tables,  to me, the layout
is different than I expected. Idle, they type of stuff.

Thanks again!
Terry


-----Original Message-----
From: Ludis Langens <ludis at cruzers.com>
To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Date: Monday, May 17, 1999 12:17 AM
Subject: Re: Newbie: Fiero ECM questions


>TK wrote:
>>
>> For those that have seen the Fiero SD code and it's brother the 85 Mass
code
>> (they were backups to each other should one fail EPA certification), it
is a
>> beast like nothing else. Both the tables and the program are different.
>> Maybe the Fiero follows some older C3 carb code, but I've never seen
>> anything that compares.
>
>The SyTy / Turbo Sunbird code appears to be derived from the Fiero
>6869/7170 speed-density code.  I haven't looked at the SyTy code all
>that much, but every part I have looked at is almost a line-by-line copy
>of the Fiero code.
>
>In the backwards direction, the 6869 code is related to other
>speed-density programs.  The 6864 4-cyl TBI has a lot in common with the
>6869.  Optimizations present in one but not the other imply that the
>branch point is further back.  Perhaps the common ancestor is all the
>way back at the (circa 1982) 5610 & 6026 ECMs.
>
>--
>Ludis Langens                               ludis (at) cruzers (dot) com
>Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
>
>
>
>