MembersPage/MiskaPeippo/AudiSSix (2006-10-25 06:53:36)

My daily driver, Audi S6 avant -95, 2.3L inline 5, 20 valve turbocharged engine (AAN).

s6_etu_small.jpg

Installed VEMS as direct replacement of original ECU (see PlugAndPlayMotronic) using factory wiring. Extra wires are needed only for WBO2. There are some modifications with the trigger wires as well (swap secondary VR signal wires in 3pin JPT connector on firewall).

Megatune settings for slightly modified 1.0.53 firmware, including new BoostController code (Update 09-Oct-2006): [MT config]

mcd.txt and mct.txt (09-Oct-06):

[mcd.txt] [mct.txt]

The engine is now running well, some tuning is still ahead.


Going to test overlapping dwell with 135-tooth, please review configuration\n

# reftooth array (mod 135), traversed backwards (54, 108, 162, 216, 270..)
h[1]=00 51 1B 6C 36 00 00 00
h[2]=01 00 02 04 03 00 00 00
# tooth width in quarterdegrees, 360/135 = 2.667
#  0x0A = 2.5 degrees -> single crankrotatation counts to 1350 
tooth_wheel_twidth1=0A
tooth_wheel_twidth2=00
# did I understand this correctly?
# with camsync, 135*10 *2 = 2700qdregrees, 2700 mod 256 = 140
reset_engphase_after=8C
trigger_tooth=01
another_trigger_tooth=36
# 60deg
ign_tdcdelay=78
# rpmk=12000/10cyl
rpmk[0]=04
rpmk[1]=B0


Some help needed for NTC curvefitting. I'm using pre-generated clt 2063_256.hex table from ntc_properthem.zip and it is a pretty close match already. However there is a minor mismatch between the temperatures:

real temp MT display Fahrenheit temp_internal adc temp_internal_wanted
+4C +9C 48 88 = 0x58 157 or 158 79 = 0x4F
+84C +79C 174 214 = 0xD6 decimal 23 223=0xDF

As you see 2849.4 Ohm, AREF=216.175 was found by the simulated annealing iteration (after some tries, for first run the error-square was slightly higher. Commited to SVN so you can play with it yourself (if you measure again).

216/256 * 5= 4.22V : It seems you pullup NTC-s to less than 5V (or aref is higher than 5V). Or there is a measurement error.


Some old things below:

Some open issues to solve

(i had exactly the same thing in my typ 85 with stock motronic AAN connected to the stock coil driven tachometer,specially in higher revs.A resistor solved the problem.But i dont know what is the problem in your setup,hope you find it and share.good luck:MembersPage/NanassyPeter)

Note about the time-saving effect of wiki-written documentation

It's notable that this install was carried out before other competing installs (despite that it was done in the cold, while competing installs had a warm garage host), because documentation discipline was appr 60%.

Competing installs have 10 and 40% documentation discipline so they lost, and might struggle for a few more days or weeks.

Even for this install, 3..5 days could have been saved with 90..100% documentation discipline, the firing order alone could have saved 1..2 days.


Airtemp sensor data:

Some values to make verification easier: Note that pullup is 470 Ohm not 2700 Ohm

Note that the tables are quite steep. The MAT goes from min to max from position 0x75 .. 0x92.

For the prepared tables, look for "PTC" on EasyTherm


Flying wire adaptor for basic functionality from genboard (v3.3) towards motronic connector (pins Mxx)

Hardware changes made to V3.3 board (inside ECM)


28.8.2006

Hallo Miska,

now your car is running well? How is the start-up, idle and warm up? How does your car behave in Part and WOT?

Do you managed to get the Knock sensors to Work?

What ignition system are you using? The same as ABY and ADU? Your cylinder head seems like the 3B one.

Can you please post your latest MT file?

Thanks

Vasilis, MembersPage/Billman

Hi Vasilis,

see MembersPage/Billman/PlugNPlay page for some comments