Jump to content

MazdaMan

Members
  • Posts

    14
  • Joined

  • Last visited

MazdaMan's Achievements

  1. Ran 2 more logs... one with CLL disable and one with CLL update rate reduced to 2 Hz at 20 TPS and lower AND 3000 RPM and lower. Logs attached. 22-09-16_ShortDriveHS_NO_CLL.llg
  2. Gotcha. It reads "4.9_L". Just reviewed the manual and L is correct as I have the analog output configured to show lambda rather than AFR. The transfer function converting the AO to lambda is correct. The conditioning unit reads the same lambda as does the G4+ program.
  3. Thanks. I'm not clear on exactly what your are looking on the O2 sensor measurement at boot up. Can you clarify?
  4. Aha, that makes sense. IAT trim and charge temp approximation were already set when I bought the kit for my car, so I left them alone as it seem to work OK. I tried advancing the inj timing by 90 deg for all points in the table. The lambda oscillations didn't seem much different, but the car felt stronger and a tad smoother. Advancing the injection also seem to make the car run richer everywhere, which makes sense given what you said. O2 sensor shows lambda = 1.097 on the G4 at boot up (see attached log). I believe that matches what the lambda display on the O2 conditioner shows as well. I'll double check that tonight and get a log with CLL inactive (see attached ECU log). I reached out to the injector mfg to get information on the characterization (e.g. SPWM). Unfortunately, the injectors are old enough that they don't have the info. I see that you once posted the correct info on this forum. Can you repost the settings? The original post had these in an LTE file format which I cannot open. Would prefer them in a Excel format but a screenshot of the settings would suffice. Injectors are Injector Dynamics ID725's. Rail pressure is constant @ 3 bar. ECU Log 2022-09-15 7;04;24 pm.llg
  5. Thanks, I'll can get such a log. I'm curious, what do you consider to be unusual about the map? Also... I understand disabling CLL and 4D for diagnostic purposes, but what might the injector timing and short PW adder do?
  6. For the syncing procedure you set / equalize the length of the pushrods that actuate the throttle plates. Then, you use a quad manometer to equalize pressure across each cylinder. Tune is attached. 22-09-08_ImprovingFuelTab1.pclr
  7. That's a good point. Yes, I did sync the throttles per the BMW procedure.
  8. I've tried turning of CLL. It I've tried turning of CLL. It doesn't seem to improve the lambda. It's interesting you mention the accel enrich... I setup a lot of accel enrich to try to make the lambda oscillations safer (i.e. trying to bias the lambda error rich). Do you think it's too much accel enrich? I do have an IAC. It's a solenoid type using closed-loop control. Lambda controller is an ECM AFX2. The 1.075 is upper bound based on voltage. The engine does have a solenoid type IAC with closed loop control.
  9. Greetings All, I need some help tuning the engine in my sports car - a 1990 BMW M3. The engine is a 2.5L 4-cylinder with individual throttle bodies, large volume intake manifold and long duration / high lift cams. Power output is ~300 HP at the flywheel. I'm running a ViPec i44 ECU using PCLink G4+ software, version 5.6.7.3632. Fuel equation mode is set to TRADITIONAL and Equation Load Source is set to MAP. Fuel Table axis are engine speed and TPS. The issue I have is that the *accurately* mapping the fuel table is exceptionally difficult at low speed and low loads (e.g. < 20% TP Main). This leads to the AFR being far off the target when rowing through the gears. This can be seen in the attached screencap of datalog. Lambda oscillates between lean and rich of target. I've tried playing around with the closed loop lambda gains and update rate table, but no setting has been able to properly control to the target. The manifold pressure seems to vary a lot (likely due to the ITB's and cams) , so I'm considering switching to baro pressure as the equation load source. I may also try 4D/5D fuel mapping, but would like a second (or third or forth!) opinion. Cheers, -h- 22-09-09_ROAD_WS.llg
  10. Thanks Adam. The video was very helpful!
  11. Greeting All, I'm looking for assistance setting up the mixture map function. The car is a 1990 BMW M3. Engine is a 4-cylinder 2.5L. ECU is Vipec i44 running the latest Wolf firmware.... 1) Any recommendations on the filters (see attached) 2) Can useful data for the mixture map be gleaned from logs taken over the road? The plan is to ultimately tune on a chassis dyno, but I'd like to get the AFR's reasonably dialed in based on some road logs if possible. Cheers, H
  12. Thanks. Does the PCLink software have the same help functions as the VTS?? Anyone else have the iVTS issues I've seen? Cheers.
  13. Thank you Simon. Could you tell me more about the PClink? Is this a seperate software program to calibrate the i44?
  14. Hello All, I'm running a i44 controller in my 1990 BMW M3. I just got the car running a few weeks ago, and noticed that the software has some issues. The tabsat the top left of the of the main page are fuzzy. Unless I hover over the tabs, they are invisible. Has anyone run into this problem? Anyone know a solution? Thanks in Advance.
×
×
  • Create New...