Originally Posted by cossie604
lol have you got an external waste gate fitted?? If not, then your hearing surge....a noise that many people confuse with waste gate chatter...something that you dont get with a normal integral waste gate.
Now awaits many conflicting replies from othe rPassionford memebers lol
Stu

ok... I have not a external waste gate, so it must be surge.....so is surge bad or ....