[Diy_efi] ECM for 1990 Nissan 240

[Rune Engelsgjerd]

Chipping the Ka24de ecu is actually not that difficult. It requires a
daughterboard soldered inn on the existing 40pin header inside the ecu and a
jumper on the back of the main board moved to force the ecu to read from the
daughterboard instead of the on board versatile rom chip.
This allows you to edit the code and burn it to an eprom, or rather a set of
eproms since the KA ecu is 16 bit.
Both eproms get programmed with the same code and the ecu reads the even
data from one chip and the odd data from the other..
The daughterboard I am currently using in a friends 240sx allows 4 different
binaries that can be switched between on the fly.
 
We are just in the process of re-mapping his car since he installed at turbo
and intercooler on it.



-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] On
Behalf Of Erik Jacobs
Sent: March 20, 2005 7:36 PM
To: diy_efi at diy-efi.org
Subject: RE: [Diy_efi] ECM for 1990 Nissan 240

> Midnight Bullets is free FREE software that you can download 
> which uses an ECU binary in combination with an address file 
> to edit the roms.  You need to hack around on the ECU .bin in 
> order to figure out what the addresses are for the software.

Additionally, I think I have some .bins floating around from the KA ECUs
along with some old posts from the oooold (And now defunct) ECU-Haxors 240
list.  The Midnight Bullets software comes with SR address files and some
other Nissan files as well -- someone talented at reverse engineering or ECU
bins might be able to look at the SR bins and the KA bins and the SR address
file and make some good guesses.

I can send these to anyone who wants.

Erik Jacobs
DGTrials / www.DGTrials.com
FestiveGarage / www.FestiveGarage.com

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