Peugeot 306 Dturbo Turbo Boost pressure help

[Low Pro]

Im wondering how to up the boost pressure on the XUD engine in my 306. I understand it is a diesel and not a performance engine however a bit more torque wouldn't go a miss. Is there a boost control valve?

Also are there any side effects to this?

All help is greatly received

LowPro

[Low Pro]

Understood and your probably right