MembersPage/NanassyPeter/BoostControl (2006-04-23 02:02:18)

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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?

How to configure in Megatune? I have an almost bone stock AAN engine too,what PID settings worked best?

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.