[Diy_efi] Speed Density EFI adaptable to V-Twin?

[Terry Kramer]

Interesting...

I believe that the BMW ECU also controlls the ABS biasing real-time. Takes
into account suspension weight distribution. 

I don't know anyone that has cracked the Motronic Eeprom layout, or has
software to do the mods. I sure would like that. I have a 2002 R1150RA, and
it has a bit of a lean surge problem below 1500RPM. Would love to connect
Datamaster to the ECU like I do on my Z28 and see what is going on.

Cheers

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] On
Behalf Of Adam Wade
Sent: Friday, May 27, 2005 3:21 PM
To: diy_efi at diy-efi.org
Subject: RE: [Diy_efi] Speed Density EFI adaptable to V-Twin?


--- Terry Kramer <tkramer at snipepod.com> wrote:

> I'm not intimately familiar with the Delphi system,
> but have a hard time believing that any motorcycle
> (or car) EFI system can match the technology
> in the latest BMW Motoronic system.

The things you list are not necessarily more advanced technology.  They are
just features, built from old technology.  Anyone could build an ECU with
what BMW has going on, if they wanted to spend the extra coin for additional
bandwidth or processor power.  The most innovative thing they have going is
the offset spark, which is a great idea for a broad, flat combustion chamber
design.  However, except for retard based on knock, it appears to be an
open-loop spark timing system.

The Delphi ECU handshakes and exchanges data with at
least two other controllers on the bike (the alarm
module and the turn signal module), and uses a basic
form of ion sensing -- by far the most advanced
technology used on a motorcycle ECU of any sort.

The Motronic ECUs used on motorcycles are also very
close to being a total mystery, at least to all the
companies and tuners I have spoken with.  Harley
Davidson offer software that will let you make fairly
major changes in your stock Delphi ECU's mapping, and
of course it is already adapted to a Harley v-angle
and displacement, making it a cinch for setting up on
another Harley.  The original poster required that the
hardware be fully mappable, and I don't see anything
available for the BMW Motronic units that would
provide any access at all.  If there's something out
there for this purpose that I don't yet know about,
I'd be very interested in hearing about it.

| 82 Honda CX500 Turbo (Cassandra)  90 Kwak Zephyr 550 (Daphne) | "It 
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