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So finally,after 1 year i decided to install the N75 WGFV,and control it via VEMS.
I know from MiskaPeippos page that i have to drive this with a free injector driver.So this will provide the negative voltage,and i should wire the other pin to ignition positive?
- Injector driver provides switched GND to N75 valve and in stock wiring harness 12V is provided together with injector supply.
- I have no exactly correct values, but you can try with ones I picked from MembersPage/Fero
- Boost conf=105 Sets PWM period to 6 (*8ms), MAP target active and reference position.
- Actuator off below this pressure=130kPa Defines lowest pressure when boostcontol starts to do something (I think AAN had a bit higher nominal pressure than 0.3bar boost achieved with wastegate spring)
- Target offset=0
- choose correct channel (INJFET and proper channel with not i)
- Set boost vs. rpm and boost vs. TPS tables as you like
- Try with following settings
- boost P=45
- boost I=27
- boost D=250
- PID integral limit=255
thanks,peter
After installing the mechanical parts and configured the ECU,i started a LLOOOONNGGG PID tuning session. I educated myself with the help of GRMracer (thanks a lot!).
Basially i used the method describer at wikipedia,tried Feros initial Boostconfig,nothing worked.after 2 hours of continous testing,i decided to make a basic test.With only P variable (ID zero) i should have a huge oscillation,while the desired target is beeing overshoot.Now that is what wont happen at all.I cant get more boost than 1 bar (200Kpa) with P only,which makes me wonder,is this really a PID control?
Please dont try to tell me what mechanical parts to check,the whole thing is allright,its a pure programming/controlling issue.
Every part of the system is STOCK,so no problems here.
I also tried to choose the best working PWM period.
with the lower (2-8),and only P max(200-255) waiting for oscillation nothing happened (max160-170kpa),and with 15msec perion and 200 P there was a slight oscillaton (200kpa + - 10kpa)
Note that the actual target was 230kpa,which was NEVER reached under the whole session.
Any suggestions are welcome, i made numerious log (10+).
I will also try Miskas settings.