Running Motronic 55 pin conversion on one S2 with distributor and another with COP (both 3B engines). 1.1.44 has worked well on both.
Figured I'd try 1.1.54, but the tables for spark and lambda got messed up in VemsTune every time the VEMS had been turned off.
In case anyone else has the same probs, just edit the VemsTune INI-file:
Search for "page 3". The table definition array for lambda has 2 entries that look like this: [8X8] - replace the uppercase X with a lowercase x.
Search for "page 4". The table definition array for spark has 1 entry that looks like this: [12X12] - replace the uppercase X with a lowercase x.
This did it for me.
If your OS moans about editing rights, uninstall VemsTune and install it again outside the "Programs" folder or in an entirely different partition.
UPDATE: 27 OCT 09
Updated the car with distributor to 1.1.62
A few problems with "Acc enrichment" and "Cold starting", but they are all sorted out now, and the car starts and runs great.
Idles excellently.
TODO: Check if boost develops as expected, and if so, update the other car as well.
If anyone needs a running vemscfg, just let me know.
UPDATE: 29 OCT 09
Still need to fiddle a bit with boost, but I must say that I am very impressed with 1.1.62. My development car (Audi 5 cyl. turbo with distributor) runs better than I had ever hoped for.
Great job on the firmware and VemsTune you guys, and many thanks to Peter Jensen for useful suggestions!
Here is a pic from my other project, a rallyecross Audi S2 that I have modified with coils from a late model S4 V8.
Almost a direct fit with modest tweaking of the coils and a slight grinding-down of the valve cover. In case anyone wonders what the distributor is still doing there, it has to stay for now because it holds the camshaft sensor.
UPDATE: 5. NOV 09
Slight problem with one VEMS box in the race car.
When everything is cold, the VEMS seems to get stuck in bootloader, and the VEMS won't start up. After a few tries, it then boots up.
If IGN is then turned off, VEMS won't boot right away (IGN back ON) unless I wait about 30 seconds.
When the car is warmed up, the problem seems to be gone. The box has 1.1.44, but considering the temperature sensitivity, this seems to be hardware related rather than software related?
LCD just shows completely lit line 1 and 3 when the problem occurs.
Thanks for any thoughts on this.
Hi Alex any chance I could grab a copy of your vemscfg 1.1.62 please? you can place it in my file area under the Jamo directory