As most of you know - we had a rolling road day today at Dastek in Dalgety Bay. I've had a sneaky suspicion for sometime that my car wasn't making the power it should be.. (i want to get this ironed out before even looking at tuning it! lol!).

I fitted a boost gauge a little while ago and have noticed that it only boosts to around 8 or 9 psi - which seemed quite low to me? - i put this down to possibly being the bosot guage maybe not being accurate (as it was quite a cheap one) - but my print out shows that the boost reading is quite accurate - here's my plots:





my figures were 209 bhp (fly) and 226 lb.ft of torque which are pretty low - it's stock bar the exhaust and panel filter.. so with this in mind - what is the likely culprit?:

Faulty BCS
Faulty CBV
Worn/tired turbo
Wastegate actuator

or any other suggestions? lol?? - FWIW Yossers V70 T5 is stock (bar panel filter) and was hitting 12 psi - so i'm guessing its a boost related issue???

any help or suggestions would be good??