Went for a drive with the aim of getting boost on target.
Took 2 short runs and adjusted duty to hold 20psi.
Did a few 1/8th runs.
No et improvement as the grip just isnt there.
Around 2mph slower on 20psi now with a 6466 compared to 26psi on the 6266.
Turbo sounds nice spooling away at 20psi.