boost adjustment
 

I have a 97 wrx wagon. It is fitted with the td04 turbo, which is the smaller turbo. I was wondering if i can get the boost turned up for extra power or is this likely to cause problems?

I also have a turbo timer which gives the impression you can adjust the boost through. But i don't know if its wired up as its not giving any info on the turbo, only giving it the cool down time.

Anyone help?