I have been out tuning the van lastnight, wound the boost up to 1.6 bar. Current turbo is gt2560r.
Im getting a bit of 'surge' between 4.5/5.5k when on boost. The induction noise doesnt sound clean, and once it hesitated on a long pull in 5th.
I can only assume this is down to running way too much boost and the turbo is probably way off the map. What can i look at to solve the issue, possibly different cover & comp wheel??