Installing Vems3.3 on a Volvo 244 with a B21ET engine. Taken out the dreadful K-jetronic to get complete control. This car should be competing this year in the Benelux Driftseries.
My name is Jochen aka Brickdrifter and I'm living in Belgium.
Current setup:
B21ET
Garret T3.60/.63 trim turbo
XS Power intercooler
36-1 trigger wheel with Ford VR sensor
IAT sensor from webshop
Volvo 960 TPS sensor
1.0.45 Firmware
Megatune, no LCD :-)
Raised idle with solenoid
Vems Serial nr.: 547 controls:
- injection (2banks)
- Ford brown top Low Z injectors with original Volvo resistor pack
- Fuel pressure regulator (set to 2.5 bar)
- ignition
- Coil pack normally used for EDIS setup
07-11-06
I've connected signal wire to EC18-pin3 and ground to EC18-pin2.
I don't get ANY reading on Megatune. Tried advancing ignition, spanner on block or even loose sensor and hitting that with a spanner. I'm wondering if the connection is right.
03-11-06
Is there someone who can make some sense out of this knocksensor recording? I would like to know the knock frequency. :-)
http://www.driftingforlife.com/images/picsjustforme/Mexicanfreqsearch2.wav
- I had to set the timing on MegaTune to 32° because it's the only way the engine runs well. With the timinglight I have approx. 50°. Is it normal for a engine to have 50° ignition advance @ idle?
- No, something is wrong.
- With crank advance set to 0 the timinglight shows 0 on the engine.
- something must be wrong with this measurement.
- With ign_balance=00 mda.. command sets advance where you think (mda01 is 1/4 degree, mda28 is 40*1/4=10 degrees, mda00 is advance from table-lookup); so your base timing is most likely not where you think. Remove a sparkplug to check TDC with a rod. I had the signal at non-TDC position several times
- Checked the TDC point with a rod
- I've set everything to zero, including ignition map. knock_default_retard=00, so only ignition advance based idle control might interfere, but that is only +-2 degrees
- Then I changed ign_tdcdelay (now 93°) so that with the timing light it showed 0.
All well so far. Then I changed ign_crank_advance to 15° and the timing light showed 24°. What am I doing wrong?
- ign_tdcdelay=7E below, so published config conflicts with above "ign_tdcdelay (now 93°)"
- if ign_tdcdelay=93 degrees is true, increase trigger_tooth by 4 and use ign_tdcdelay=53 degrees (4 tooth that is 40 degrees lower)
- also make sure trigger_tooth=.. is published correctly
- Up to date config and tables below with suggested increase of trigger-tooth.
- There is a suspicion that bad wheelshape of the 36-1 wheel tricks you, eg. sometimes (depending on RPM) the tooth after the missing gap is lost. That counts wheel_error, but with ALLOW_SLOPPY_TOOTHWHEEL (that is default) it runs (with 1 tooth retard when tooth is lost that is 10 degrees)
- check wheel_error counter (LCD mlp01 or MegaTune log or LED)
- No trigger errors what so ever. Even if this was the case, the ignition that I check with the timing light advances too much. I set the crank-advance to 15° and timing light shows 24°.
- check wheel_error counter (LCD mlp01 or MegaTune log or LED)
The most likely problem might be the timing-light: with wasted spark it will have a wrong idea of RPM and angles. It is theoretically possible to compensate (nontrivial calculations easy to get wrong), but best to
- use a cheap timing-light that flashes at the time of the spark, without offset
- if you have a fancy timinglight, use it in a mode where it flashes at the time of the spark, without offset
- If you only have a TDC mark on the engine, note that you can quickly change advance to 0 degrees for testing, just apply a bit more throttle and issue command "mda01", engine will run much slower and manifold etc gets very hot in the long run. After finishing, mda00 returns to normal state. //Emil
- Thanks Emil, the timing was indeed correct. Tested with a LED timing light as suggested on page: http://www.vems.hu/wiki/index.php?page=TimingLight
Primary trigger settings - mine differ to yours:
You seem to have:
trigger_tooth=00 and another_trigger_tooth=12
tooth_wheel_twidth2=0A and reset eng phase...
It might be worth patching your settings with these and setting up again.
22-10-06: Tried but no difference. With this setup the engine only runs ok with ign_tdcdelay set in MegaTune to approx. 60° with the whole ign map set to 15°.
Again, I triple checked that the engine is in TDC when the mark says so and timing light shows zero when crank-advance is 0.
CONFIG AND TABLES
Misc1out is used for waterinjection solenoid
http://www.driftingforlife.com/images/picsjustforme/config.txt
http://www.driftingforlife.com/images/picsjustforme/tables.txt