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So you want to know how to modify calibrations and burn chips for SyTy's......

Then you came to the right place.  Where do we start...

Chip burning basics (hardware and whatnot)

The DIY-EFI (GMECM division) has a great FAQ for this.  http://www.diy-efi.org/gmecm/faq/
We had a great thread about it on the SyTy UBB, but it was lost in the latest UBB crash....

I use a Needham's EMP10 programmer.  They have recently come out with a software update that allows it to work under Windows NT/2000, whereas before it was only DOS based, and the burner would only connect under Win95/98.  Basically, if you want to be able to burn Ultimate chip programs, you need hardware capable of burning 27c020/27c2001 eproms (either one, they are the same).  If you only want to burn stock type chips, the eprom used is the 27c128 (27c256s can be used, as well as 512s etc).  Dig has been using some flash chips, the one to get is the Atmel 29c256.  I buy my chips from JDR usually. The flash version of the Ultimate chip (the bigger, 32pin, 27c020/27c2001) does NOT work in our hardware setup.

Software / Bin editing

Promgrammer is what I've been using for the longest time.  The download page is at www.sytyauthority.net and Bill Calcagno has been updating the program for us, adding features and fixing errors.  Thanks Bill!  

Tunercat is damn cool, and does most anything we need to do (Dig and I often think up stuff that makes a customizable program good - as in "I changed the code so that the table headings in that table are no longer correct").  It does cost you though.

Hexeditor - some kind of hexeditor should be downloaded as well. You can find them as shareware on the web.

SyTy Chip Specifics

VALUABLE info in this piece of GM history.  Read it, memorize it, print it out and keep it close at hand.  Lots of good stuff at that site (  www.diy-efi.org )

Identification of major tables & chip entries - updated 8-5-02

How to work on calibrations and tune motors

Code changes, and why they are done

Some other tidbits -

Unless you have started with a 3 bar map sensor chip program, or made the changes in the code yourself, you will not be able to make a 2 bar chip into a 3 bar chip using Promgrammer.

Bill has done a lot with Promgrammer, adding our custom code hacks to the options to be modified. Makes it real nice to see what is done to the bin you are editing.  If you have questions about any of this, post to the syty.net message board, tuning section, and someone will respond.

BG -

 

Matt H
Robert P
Les Y
Tony M
Jeff D
Nolan N
Jack O
Mark L
Hunter
John W
9.89@137 10.26@13
10.29@137 10.71@126
10.79@126
10.95@123
11.00@128
11.00@122
11.19@121
11.20@128
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