A few suggestions:
Do you have the option of retarding your exhaust cam gear to bring the power band over to the left?
VCT would be turned off after you make peak torque, you see the power/torque will decay faster with it left on all the way to the limiter
Once VCT is turned off, you'll find the motor will take a bit more timing being ramped in
Send its mum, more boost!
Of course, depends on your exhaust pressure.
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