ECU tuning - where are we now?
Veteran Member
Joined: May 2009
Posts: 27,473
Likes: 4,891
From: Yorkshire, England
When I took a PCM apart it had 2 Renesas (formerly Hitachi) SH7055 256-pin CPUs. Lots of PCMs have a single SH705x (2/5/8/9) so it's "just" work to hack it. But where's the big enough demand? Looks not to be there.
We can already reflash using a Mongoose JLR, which is fairly cheap. Now "just" need a map editor.
We can already reflash using a Mongoose JLR, which is fairly cheap. Now "just" need a map editor.
Veteran Member
Joined: Feb 2011
Posts: 9,733
Likes: 2,201
From: on-the-edge
"just" 
There are toolchains out there that have the sole purpose of uncompressing an image to binary. I would suspect that the images in the SDD/IDS distributions are compressed as well as signed. Ignoring the signature part of the problem for a moment, it is still easier than having to do an image dump first through a bootloader.
I would add that if one wants to modify the maps, the number of cpu's is somewhat of a red herring because ultimately it is the data for the base maps that you want to modify.
There are toolchains out there that have the sole purpose of uncompressing an image to binary. I would suspect that the images in the SDD/IDS distributions are compressed as well as signed. Ignoring the signature part of the problem for a moment, it is still easier than having to do an image dump first through a bootloader.
I would add that if one wants to modify the maps, the number of cpu's is somewhat of a red herring because ultimately it is the data for the base maps that you want to modify.
Last edited by plums; May 24, 2013 at 05:44 AM.
Senior Member
Joined: Mar 2011
Posts: 309
Likes: 35
From: Rockville MD
Doing in yourself saves lots. Here is a rundown of mine with costs
Remove rear mufflers $100 for pipes and tips installed
Test Pipes $0 sold old cats for more than what it cost to build system
Mafioso Intake $250
Eurotoys 1.5 pulley, puller and s/c oil $300
Mina Gallery v2 intake $135
Bored Throttle Body $99
Meth Kit $325
This doesn't take into account hoses and gaskets needed as I pulled the whole s/c off to replace the coolant hose below the s/c, but gives you an idea of what I paid for parts. Also I did do some basic porting on the intake side of the s/c which just cost me materials.
Remove rear mufflers $100 for pipes and tips installed
Test Pipes $0 sold old cats for more than what it cost to build system
Mafioso Intake $250
Eurotoys 1.5 pulley, puller and s/c oil $300
Mina Gallery v2 intake $135
Bored Throttle Body $99
Meth Kit $325
This doesn't take into account hoses and gaskets needed as I pulled the whole s/c off to replace the coolant hose below the s/c, but gives you an idea of what I paid for parts. Also I did do some basic porting on the intake side of the s/c which just cost me materials.
Joined: May 2012
Posts: 1,295
Likes: 252
From: Canada
Nope, definitely available, plenty worth reading in the following thread:
https://www.jaguarforums.com/forum/s...on-str-104033/
https://www.jaguarforums.com/forum/s...on-str-104033/
Veteran Member
Joined: Jul 2010
Posts: 1,178
Likes: 86
From: Orlando, Florida
Nope, definitely available, plenty worth reading in the following thread:
https://www.jaguarforums.com/forum/s...on-str-104033/
https://www.jaguarforums.com/forum/s...on-str-104033/
Good Ol Eurocharged 
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