I have messed with this since about a year and a half ago. I actually found it when i was researching everything on the motor to band aid the idle smoke issue.


When i had the valve lift raised it would smoke less and take longer for it to happen.

It also changes your powerband, the more lift the engine wont feel as revvy or powerful in midrange however when you fully stomp on it , the ass dyno says it pulls better then stock setting.

Some people have used it to fix the issue you described with idle and misfires on 545s 745s etc, not many people know about this setting. And being able to alter the lift on valvetronic...

When i get my car on a dyno sometime this year im going to change certain things like this for example to see if there is a difference.

Stock is not .3 it is the .099 setting. You may have other worn parts say intermediate levers and it hs adjusted for that which is why thats what it is. I have hooked up and checked on a few diff 4.8s.

Another interesting thing when you are editing the settings the car stumbles for a second when you made over about .25 of a change in lift, if you dont have a loud exhaust like mine you wont notice, it does change idle sound and exhaust note of the motor slightly.

__________________
2006 X5 4.8is Fully Loaded