right i know somone who's just got an rs turbo,
on its dyno test that it came with, it says it was overboosing with "the amal valve fully extended".
how would i be able to tell if the turbo's nackered, or if there was any work carried out to sort that.
also its now got a dump valve fitted if there wasnt any work done would it be safe to take the dump valve off.

on the dyno it says it was running 150bhp but its only got a new exhaust dumpvalve and an uprated manifold, could it still be seriously overboosting?