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Old 11-15-2006, 06:19 PM   #1
Tgui
Scooby Specialist
 
Member#: 44771
Join Date: Oct 2003
Default Open Source Tuning Sticky Proposal

(I guess I'm doing it, give me a few days)

PLEASE LET ME KNOW HOW MY FACTS STAND
**********************************

This thread contains the following information in order:

1) Open Source (Free, with source) tuning utilities.
2) Location of free, staged, and stock ECU ROMs.
3) Important supporting projects.
4) Overview of basic tuning techniques (very basic) using the the first three resources.
5) Answers to common questions concerning the Open Source tuning world.


-------------------------------------------------
1) Open Source (Free, with source) tuning utilities.
-------------------------------------------------
[1.1] OpenEcu.org
Features:
- Flashing Utility
- ROM altering
- Windows only
- Open Source??, No source has been released

Colby is the maintainer of this set of programs.

The first of which provides the means to flash altered ECU ROMs to a large number of Subarus.
- 16 bit 2002 - 2005 WRX
- 32 bit 2006+ WRX
- 32 bit 2004 - 2006+ STi
- 32 bit legacy GT

The second program provides the means to alter ROM data. Enables user to alter fuel, timing, boost, etc.

[1.2] Enginuity.org
Features:
- ROM Altering
- Live Data Logging
- Cross Platform (Windows, Linux, MacOS)
- Open Source

qoncept is the maintainer of this website. Enginuity is an effort that provides ROM alteration, data logging and a large number of ECU definitions.


-----------------------------------------------
2) Location of free, staged, and stock ECU ROMs.
-----------------------------------------------
[2.1] Osecuroms.org
Features:
- ROM Collection

ev8siv is the maintainer of this website. This is a collection of donated stock ROMs pulled from many different ECU revisions. Also included are contributed and ev8sivs altered maps for many stages of WRXs. Users have the option of using one of the free provided ROMs, or purchasing one of ev8sivs personal ROMs.


--------------------------------
3) Important supporting projects.
--------------------------------
[3.1] Tactrix.com
Features:
- Subaru OBD2 Cable
- Mitsubishi OBD2 Cable

This website lists a number of OBD2 cables available for a number of Subarus and Mitsubishis to allow users to interface with their ECUs and flash roms, log data, etc. This cable is a must before using any of the other Open Source tuning tools.


-----------------------------------------------------------------------------------
4) Overview of basic tuning techniques (very basic) using the the first three resources.
-----------------------------------------------------------------------------------
[4.1] Deferred Until further feedback


------------------------------------------------------------------------
5) Answers to common questions concerning the Open Source tuning world.
------------------------------------------------------------------------
[5.1] Can't you only flash the stock ECU a few times as per what Cobb said?
Answer: (Stolen from eamiller on Enginuity.org)

100 Reflashes isn't so much a myth, but a specification that has been put out there without any background information.

As an automotive electrical hardware engineer, I have designed a number of products which use flash memory. Renesas specifies that any block of flash will survive a MINIMUM of 100 flash writes. Not only that, but generally, there has to be a data retention life (usually minimum 10 years/100,000 miles). If you look at how flash memory technology works, any write is detrimental to the cells. Reads aren't very detrimental, hence you can read a cell many hundreds of thousands of times (or more). Writes, however, affect the cell and can eventually damage the cell so that it is no longer readable (or writable), and every write reduces the overall life of the cell. So, if you re-write a cell thousands of times, it may not retain it's data for 10 years worth of reading.

EEPROM, on the otherhand, is far more robust than Flash. It can be re-written more than 100k times guaranteed. In fact, many devices in a car re-write EEPROM every time the key is turned off (to remember settings, for example). However, it's very expensive and very small (in comparison to flash)

So, the short answer is, you are guaranteed a minimum of 100 rewrites of a cell. Beyond that, Renesas doesn't guarantee anything. You may have thousands of re-writes on a cell and be OK today, but years down the road, the flash may fail.
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Last edited by Tgui; 11-17-2006 at 03:35 PM.
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Old 11-15-2006, 08:27 PM   #2
disque71
Scooby Specialist
 
Member#: 57330
Join Date: Mar 2004
Chapter/Region: MAIC
Location: Pittsburgh, PA
Vehicle:
2008 WRX

Default

+1 for sticky please, i find my self sending a ton of pm's emails etc
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Old 11-24-2006, 10:37 AM   #3
JustinS STi
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Member#: 65125
Join Date: Jun 2004
Location: KC MO
Vehicle:
05 STi
silver

Default

Here is my writeup, if any of the verbage or links would help you feel free to use 'em:

http://forums.nasioc.com/forums/show....php?t=1102607

Justin
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Old 11-24-2006, 12:59 PM   #4
disque71
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Member#: 57330
Join Date: Mar 2004
Chapter/Region: MAIC
Location: Pittsburgh, PA
Vehicle:
2008 WRX

Default

here are some of my write ups

the first is a roll call for Enginuity users
http://forums.nasioc.com/forums/show....php?t=1094911

this thread details stage 2.5/4 with open source tuning
http://forums.nasioc.com/forums/show....php?t=1139589

details of stage 2 with open source
http://forums.nasioc.com/forums/show....php?t=1141847
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