Saab has always had their own mind when it comes to programming philosophies in their own Trionic engine management systems. I have since 2007 been a part of the team that develops the open source platform Trionic Suites and has had loads of fun discovering all quirks. More info at the end.
Today I thought I’d share some info on a 2011 Saab 9-3 basefile for Trionic 8, 55578951 FF0L_C_FMEP_24_FMEF_85b.
The file is intended for the Saab 9-3 XWD 2011. Stock form delivers 210bhp and 300Nm on both Petrol And E85, not like the earlier Biopower versions that delivered more power when fueled with E85.
The code has plenty of checks to see what engine code is configured (Low/High power output etc.) and hidden (or in tuning speak “hard coded”) limiters added by the software engineers as example shows here:
The example above is one out of several hundreds of hidden limiters. I have worked through them all and written tuningpacks for T8suite with cooperation including Mattias Claesson, Myrtilos and Chriva. Originally the tuningpack for the FF0L concisted of 406 lines of instructions but could be reduced to 56 lines after Mattias introduction of a Wildcard search. This was later imporoved further by Myrtilos designing a small bypass for some of the limiters, code down to 38 lines!
Result of this tuningpack is that a staggering 955 changes has been made to the code. Imagine changing all those by hand, or just to find them all!
- Reported changes:
- Default torque limiters: 39
- Hardcoded airmass and torque limiters like the table above: 913
- Biopower torque limiter: 1
- XWD torque limiter: 1
- Max Turbo Speed limiter: 1
The “default” limiters are what need to be changed to allow for more than 400Nm of torque as well, this was the default on pre 2010 bins!
Attached is a log from a 2010 XWD with a hybrid K04 turbocharger. Airmass like this would not have been possible without the change of the hidden limiters!
Trionic Suites can be found at www.txsuite.org
Happy tuning and please comment below!
///Mackan
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