I got an Audi TT 2007 VR6 8J (PQ35) running on EcuMaster Black and DQ250.
The car is still being built. I want to go around 800nm.
While reading the forum I found out about CAN-BUS limitations on PQ35:
Your problem is, 630Nm is maximum value for MO2_max_Mo, signal is only 6bit and factor 10.
So, if you change Com_trqMaxNorm_C in EDC higher than 630Nm, CAN bus is limited and will still send 630Nm (FF FF FF). TCU will calculate torque on 630Nm and torque modell is bended ..
(I never need to chance this value in this range in my projects so fare, so did not have in mind the maximum of MO2_max_Mo Undecided )
So, no chance send higher value in CAN doesn´t care if Diesel or Pentrol..
What I don't understand is whether it applies to my case (EcuMaster Black instead of ME7.1) or not?
In EcuMaster settings there is a setting called "VAG MDI torque". I found this explanation on EcuMaster's forum:
MDI torque is a prameter from VW CAN stream that tells the gerbox how to intepret the torque percent sent from the ECU. As I wrote above the ECU sends torque percent, not an absolute value.
So here it says EcuMaster sends a percentage of torque, not an absolute number. Thus, a CAN-BUS limit of 630nm should not apply in my case?
Here's my guess how things might work:
- You set max torque to 800nm in the DQ250 tune
- You set VAG MDI torque to 800nm in EcuMaster
- When you're driving full-throttle at 800nm, EcuMaster sends "100%" to DQ250, it applies pressure required for 800nm
- When you're driving part-throttle at 400nm, EcuMaster sends "50%" to DQ250, it applies pressure required for 400nm
Is my understanding correct or not?
