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Variable Camshaft Timing Issue on BMW M54B30 with EMU Black ECU

Variable Cam Control Tuning

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Discussion and questions related to the course Variable Cam Control Tuning

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Hey everyone,

I've been working on a BMW M54B30 engine with an EMU Black ECU, and I'm facing an issue with the variable camshaft timing. I was wondering if anyone here has experience with programming the camshaft on an M54B30 engine?

The problem I'm encountering is that the camshaft adjustment seems to only respond at around 80% duty cycle. This behavior seems a bit delayed to me, and I'm not sure if I've made an error in my setup or if this is normal with these enginges.

Has anyone else encountered a similar situation or can provide some insights into whether this delayed response is expected behavior?

Any advice or information would be greatly appreciated!

Thanks in advance.

What is the oil temperature and pressure when you are trying to control the cam? Are you using the OEM spec'ed oil? On some engines VVT control struggles if the oil is not the designated viscosity. In the VVT CAM#1 parameters, what is the value of Steady pos DC?

Do you have a graph showing the response time of the CAM, say to a step change made to the VVT - CAM1 Angle #1 table. Show us CAM1 angle, CAM1 angle target and CAM1 valve DC.

Thank you for your response! No, it's not the original oil, no. I forgot to mention that... In the engine, we used 10w60 oil. I'll probably be working on the car again this Wednesday. I'll likely also be on the dyno, so I can log everything and provide you with the data. I've also been thinking that it could be the viscosity.

Thanks a lot, I'll let you know as soon as I have the data.

That duty cycle certainly seems excessive and likely indicates the system isn't moving to target with reasonable values. This could be due to a number of things electrical, mechanical and tuning related, so hopefully your data will narrow things down a bit for you.

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