Introduction

[Roger Talbot]

Compared to your work I feel primative.  I have gone into your and seen the
common Shelby- Dodge Problems.  In truth I have the AIS symptoms and will try
that. But, now I am curious about the data and control computer.  What do you
all use to get into and observe the data stream?
Roger

Geoff Allan wrote:

> Hi all! I've just subscribed, and here is my story
>
> I've been spending some time over the last 2 years attempting to get more
> information on the ECM in my 87 Chrysler turbo car. As most of you know,
> this information is not easily available. I've been stockpiling Chrysler ROM
> images from the era, and have a page that is hopefully informative for
> others attempting to decode this spaghetti of code:
> www.calgary-web.com/cip/Crystal.html
>
> On this page is a disassembly of the 1987 Chrysler 2.2 Turbo II (Mopar
> Performance version) controller, which adds increased boost (to 14 psi from
> stock 12) and removes the overboost shutoff. I wrote the 6803 disassembler
> and will make it available.
>
> Primarily, the Chrysler ECMs CALCULATE things instead of looking up tables.
> Injector pulsewidth is calculated from rpm, TPS, known injector flow rates,
> etc. rather than looked up in a simple list... which makes it difficult to
> alter, and essential to find these values for altering. I would like to
> allow the use of a 3-bar MAP and +40% injectors, which would allow me to
> retain good idle and mileage, while running boost into the 25psi range
> (which takes our cars into the low 12's and high 11's). As a bonus, these
> modifications would be undetectable, and keep the car looking stock.
>
> If anyone else is working on Chrysler ECMs from the era (85-93) I am very
> interested in sharing information to expose this thing!
>
> Geoff Allan; Calgary, Alberta, Canada
> 1987 Chrysler Daytona Shelby Z, T2, A555, original owner
> http://www.calgary-web.com/cip/ShelbyZ.html
>
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