very familiar with tuning C5 and C6 but new to the 996tt arena.
i realize that the 996tt runs a wideband so i would assume that the car runs in closed loop during PE modes? if so then the STFT and LTFT will be enabled during PE. what is the range in which it can +/-.......-20 to +20?
isnt there and tuning software that we can buy that is single user?

just wanna get a discussion going here to pick some brains

 

pick some brians?

 

thanks for pointing out the fact that i cannot spell....
thank god that the lack of pelling abilty doesnt affect one's income....i'd be broke

 

The 996tt and many other Bosch ME7 cars have dual wideband fueling control. The car stays in closed look operation in better then 90% of driving conditions.

STFTs and LTFT's are -+ 25%.

There are 4300+ "maps" in me7 ecu's. Sure there are a few "end user" tunable programs....at best they give you access to 10-15 of these "maps" .

 

sounds like some more reverse engineering needs to happen

 

Thousands and thousands of hours...... There will never be an ls1edit, OpenEcu (EVO) or Hondata in this market.

 

oh no doubt! unless there is some geek that likes to break code and has no life..

LOL!


tony these ecu use the maf and map....maf to count air and map to predict the amout of air in the intake track?

how well does the ecu adjust under WOT when there is a lean condition/rich?


i delete the maf on my c5 and run a custom OS that is a 3 bar SD tune.

 

anyone else wanna elabortate on the functions of the ecu?

 

Subscribed

 

probably not... those left and there are less then a handful are probably working on it as we speak... LOL

 

*crickets*

 

The me7 ecu is load based. Load is a calculation of air flow and is basically completely independent of manifold pressure. Yes, the 996tt has a map sensor, but it is used very little or not at all in actual engine control.

The ecu corrects VERY well under rich or lean conditions, based on the wideband o2's readings.

Not enough emphasis is put on having fresh 02's in these cars. In other markets that run wideband control and ME7 ecu's....We swap out 02 sensors before any major modifications are completed....

 

Very interesting... elsewhere I see a reliance on "OBD error codes" to drive O2 sensor diagnosis... I feel that O2s, MAFs and Plugs are the 'holy trinity' of driveability issues in many (high performance/high output) cars - well before typical OBD codes or other 'macro' indicators are tripped.

 

Tony

good stuff thanks for taking the time to post good info.

 

Sensor or mechanical wear part has a service limit or service range. These limits and ranges are for STOCK power levels.

Add a significant amount more power and you will see failing parts cause driveability issues well before you get any CEL or OBD2 codes.