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Originally Posted by talhagursoy
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You have a timing fall out also due either fueling spool too rich or regular fueling target is too rich on the onset of WOT between 2500-3000 RPMs. i would assume your acceleration has a sluggish and jagged feel instead of being progressively smooth ?
You have some wgdc oscillation also between 3000-4000 RPM. One of your PID tables are over aggressive. However you also have a lot of throttle closure which aggravating a lot of things and it may not be the PID
The tapper off and timing curve are displaced from each other, but this is minor since you don't have any timing corrections. The early taper off mostly induced by the throttle closure
You have a load spike on the down low.
Over all I am detecting you VANOS is not dialed in correctly for better flow, well at least not for your setup. I can tell this by seeing your load and boost curves are not synced. This is just my opinion on what they should look like.
Here is an example off another Z4 for an idea
http://datazap.me/u/buraq/log-145590...o=4&zoom=17-70
Im not sure if your on an OTS or if you are being custom tuned. If you are being custom tuned then more likely the tuner knows this and will progressively address this tuff on the revisioned maps.