Bug or feature on boost control hitting spark cut?

[micotito]

MS3 release 1.5.0

While tuning my closed loop boost control found an strange behavior, overboost cut hits on my target table values not on my maximun kpa set of 270.

I had set my targets to 250 first and max kpa to 270 and always hitting spark cut limiter. So I reduced my targets to 230 kpa and start hitting earlier. So found in logs that status2: 96 that is overboots and spark cut at > 230 kpa, but my max kpa limiter is set to 270, changed to 300 and same behavior. Have not tried turning it off.

Why is status:2 96 when kpa > 230 that is my target boost value?

Also what is {status2 & 8} it is not defined on ini file or what would be status2: 60?

Thank you.

[NigeT]

I think you have Boost Tolerance enabled at 5kPa above target.

[micotito]

Thank you very much. I just enabled it trying to troubleshoot another issue. So tolerance acts over target values and not max kpa limit.?

I tried turning off overboost protection and works fine up to 280kpa til redline at 7500 rpm. But I was asking for only 200 kpa.

Anyway more cl boost control tuning and all set.

I'll try with tolerance off.

Thank you very much.

SOLVED.!!!

[jsmcortina]

Tolerance relates to your target.
e.g. if at lower RPM you are requesting 150kPa but somehow your turbo achieves 200kPa that could be a problem.
Using the boost tolerance allows in effect a variable over-boost. Setting it to 5kPa is too tight though.

James