E38 mafless hesitation after wot

[VX-SS-383]

Hi
Iv'e been maffless tuning my VF commodore and seems to go very well
so far but when you start using wot then cruise at say 1500-2000 it gets a hesitation
after a wot run but only then.
Apart from that it drives really good.
Anyone had this problem any ideas what the cause is?

[ProperTuningOG]

What's the ramp rate for PE and enrichment, in and out?

[VX-SS-383]

PE ramp in 1.10 ramp out 0.01
PE delay 2000 rpm

[ProperTuningOG]

Whats the AFR during the problem area?

[VX-SS-383]

Need to find the log but I remember afr is fine then goes lean when it happens.
The cars hesitates/ jolts then its fine.

[joecar]

Post files.

[VX-SS-383]

Actually looks to be timing dropping.
In the pic it drops to -3 deg.