MembersPage/AndreasThulin (2006-02-02 05:19:21)

Planning VEMS 3.3 for turbocharging BMW M50B25 engine in an BMW E36. Lives in Sweden Gothenburg.

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M50b25

Enigne Spec:


Question about WBO2

I'm still struggeling with the WB02. When I turn it on, Ri and Nernst begins to fluctate and Heater increase, Pump=64. Then when the O2% value shows up, the values of heater and Pump and O2% begins to fluctate. I have also noticed when it's turned on, the box begins to give away a sound (it sounds like an airleak does). I'm using the exact same configration values on the widebandsetting as the manual, and use my own pump_zero value. Here a log from the mlp07 page with 0.5s intervall. http://83.227.224.152/bmwturbo/bb.txt.

I have also notic that the only stable value on this page is AFR=14.83, except when TPS>50%. When this happens it goes down to 11.37. Does it seems like something is broken on the board or is it maybe some noise, or else? The wiring is correct, have checked it several times now.


Question about ING_DUALOUT

Going to startup the car soon and going to start with wastedspark first. I have compiled a firmware with ign_dualout and is now setting up the config to get this work. I have a preassembled box with 6-2ign option which means ign channel 03 and 05 are set up for logical levels. Therefore i can't use conf a'la Dave as recommended the manual as i would if I had the ign channels in row 00..05. The firing order is 1-5-3-6-2-4:

Is it correct then to set up up ignchmax=05 and h[2]=04 01 07 02 06 00 00 00 ?

This seems good, assuming that cyl4 fires after your camsync pulse (selected edge) comes, therefore you start with cyl5.

If this is not the case, rotate the order accordingly (and write the 1-5-3-6-2-4 as .... ).


Began to calibrate the sensors today. Started with WB02.Used the config from the manual and added my pump_pw_zero:0x64. When i then tried to calibrate the O2% the values were unstable and hade a difference between 20.5-21.5. All values on mlp07 page were unstable except AFR. Any suggestion?

Then i began with EGT. Boiled it at and set the value on 100C. On ice it showed 0 C. Then i put it onto gasflame on a lighter. 880 degress just above the flame. Shouldn't this be 677C? At 15 in the garage it showed 11C. Only changed multipler, the offset didn't change anything.

The IAT and CLT:

Should i be satisfied with this or should i try a diffrent temp sensor file? The reference temp is taken by a normal thermometer

Q: The wiring is almost done, 80% done. Have made a piout table, but unsure about how to wire the knock A&B. Also unsure about the Idle Air Control Valve. It's a Bosch 0 280 140 545 1738 981. It has 3 pins. I guess one is ground, the second 12v supply and the third should be connect to injector #7 or #8?

Q: I measured the trigger angle 60 degrees before TDC.

Q: I want a tachometer signal to the stock rpm gauge. How should i set this up? Is there an output for this, and can vems handle this when I'm using COP?

The stock wiring scheme: http://www.autolib.diakom.ru:8001/CAR/BMW/1992/325%20Series/WIRING%20DIAGRAMS/11.pdf

Pin out:

Function EconoSeal pin
Sensor power 5V 36-28
Sensor ground 36-26
Power ground 36-5
Power ground 36-21
Power ground 36-22
Power ground 36-32
Flyback 36-23
injector 1 36-7 (Injector A)
injector 2 36-19 (Injector B)
injector 3 36-8 (Injector C)
injector 4 36-20 (Injector D)
injector 5 36-9 (Injector E)
injector 6 36-18 (Injector F)
CLT 36-14 (CLT Coolant Temp)
IAT 36-2 (Intake Air Temp)
TPS 36-1 (TPS signal)
TPS 5v 36-28 (TPS +5v)
IAC ?
Crank position sensor (vr) 36-27
Cam position sensor (vr) 18-13
knock signal A EC18-2
knock signal B EC18-3
coil1 36-35 (Coil #1)
coil2 36-33 (Coil #2)
coil3 36-34 (Coil #3)
coil4 36-11 (Coil #4)
coil5 36-24 (Coil #5)
coil6 36-10 (Coil #6)
Fuel Pump Relay 36-15
nernst_cell 18-13
heater - 18-18
pump - 18-7
pump + 18-9