a mapper who carnt modify a map is not a mapper he is just an ecu flasher 99% of the mappers in the uk just flash random bought files or they are just files from a database for your car
ther is very few mappers who can map the pd170 and most will say they can but it will just be an ecu file that they flash on not a map made for your car just generic shiz
as for the stuter i think im 100% confident in saying that wen the boost overshoots 27psi the car stuters and im also confident 100% of mappers dont no what causes the car to stuter at this point
ther is a couple of mappers who can make more boost from this engine but they hav to trick the ecu so it only thinks its making 26psi of boost wen in reality its making upto 37psi with a gtb2260
i may come across as an asshole and a retard at typing but im not

well mayb the typing part i am retarded at