boost help

[EuroTunerGLI]

alright guys i need some help again...alright so my BT GLI is currently my daily driver...so i figured for daily driving boost could be at like 12-15lbs and that wouldnt be too much stress...however when im driving it feels like the car has to force itself more to keep the boost down...than if i left it at 20-21+ lbs...i know lower boost is better on the car and gas...but im just wondering if lower boost on a BT is more stress by containing itself then just putting it at a little higher boost

thanks guys and input greatly appreciated:tup2: