compressor map would be useless as it expects to see manifold pressure being above 1000mbar , its not only top end in 6th thats affected , its top speed in every gear if you drop the rev limit , vvtli engines make power right on the limiter as it is , so whats the point of moving up a gear at 7200 if its still going to be making power at 8200 , your losing power doing that and making a slower car and the reason the compressors lift point was lowered is the charger moves enough air at low revs to create torque at 5200 on the high cam , if you made a TS lift at 5200 , id say thered be a big gap in your rev range where nothing happened , im sure toyota researched the time to engage the 2nd set of lobes