Hi,
My projectcar is a 205 GTI with a 1.9 litre 8 valve engine. I turbocharged it some time ago and am now fully rebuilding/upgrading the engine to suit high boost. Have a look at my project webpage http://www.205turbo.nl
specs in a nutshell:
alloy 1905 CC wetliner engine
16 valve cyl head
Mitsu td05 16g turbo
Current issues / remarks
I'm hitting 100% Duty cycle with my injectors. So now i want to add 4 extra in the runners. The hardware I have avaiable but I found little documentation on the staged injector setup in vems.
what I found is: http://www.vems.hu/wiki/index.php?page=GenBoard%2FUnderDevelopment%2FStagedInjectors
is this still the most recent information?
i.e.:
- are the bugs still in the system?
- I need to reccompile the firmware for staged injector support?
I want the secondary injectors to have the same p/w as the main injectors and want them only on boost ( perhaps > 130-150 kpa)
the main (highz)injectors all have 1 driver and I was planning on using 2 drivers for the secondary injectors. (so one driver for two highz injectors)
or would it be better to just connect 2 drivers to the main injectors and two to the secondary ones?
any suggestions?
Tachometer out doesn't seem to work.
I wired the tachometer to EC-18 pin 12 (SPECFET 0) and set the folowing parameters in megatune:
Tachometer channel: SPECFET
Tachometer channel: 0
Tachometer divider: 0
in the help it says:
Most GenBoard outputs is only pulling the output low (0 volts)
If your tachometer wants 12V or 5V signals, wire up a external pullup resistor use Tachometer Divider if you want a lower frequency to your tachometer.
I haven't tried a pullup resistor yet. What kind of resistor should that be?
The configuration values are added to config, but the tach-out implementation is not yet in stable firmware.
>> Ok i'll wait for the new firmware for that
OLD / solved issues for reference by other users perhaps experiencing simmilar problems
Megatune showed wrong voltage:
- Only problem is the volt meter in Megatune. It gives 20 volt readings while battery voltage is 13 v.
- You probably missed to calibrate it, adjust battery calibration. Default batt_cal=0xBC (decimal 188) or so
- thanks for that!
- You probably missed to calibrate it, adjust battery calibration. Default batt_cal=0xBC (decimal 188) or so
Ignition problems. Fuel worked but no sprak.
- Publish full config, saved by mcd command.
- Try to compare your ignition related parameters with a working config, such as MembersPage/MarcellGal/EngineSwap .
- As the last chance, start again from the working config, only change what is necessary.
- check again if you missed something from GenBoard/UnderDevelopment/FirmwareChanges
- Eg. make sure secondary_trigger=02 is used ?
Thanks for the feedback! It turned out to be the secondary trigger indeed.
Took it for a drive this day. But the engine ran verry lean (afr 1:16) and it appeared all the tables are ampty somehow in megatune. I had this problem with a more recent firware before. Ans switched to a bit older one that seemed to work fine. But now the tables are empty again. Does anybode have any idea how this could be fixed?
A: There was a ini update on the magatune page.
http://www.vems.hu/wiki/index.php?page=MegaTune
<<This package has bug in ini file causing settings lost when updating to ECU, here is [fixed ini file]>>
The engine didn't start -> no fuel injection.
the pulse width megatune displays is 0 though the crancking pulsewidth is set. And the the req_fuel is set(and all tables are filled with the right values)
A: somehow the decel fuel cut rpm was set to 0 rpm after a firmware update. I set is back to 2500 rpm and it started again.