The DV isnt the problem ive tried 3 different performance ones on the car. The noise is a crackling thats it not much more i can say, doesnt seem related to the rough ride i get at 80 to me it almost sounds like the turbo is running with no air in it when i crackles, well at least thats what id imagine it to sound like. I dont have boost figures as of yet although i do have boost guage pods in the house waiting to go in, plus ill get the revo dealer to check it out. I was getting a Boost Pressure exceeded error code a while back but that was fixed after a cracked pipe was found and replaced. I also have a slightly higher air temp althought the revo dealer told me this wasnt really causing a problem.
Just had this message related to the crackling in another forum didnt really understand it:
"Detonation definitely sounds like crackling. But I've never heard it on a 1.8t. I guess my 3" TB covers it up for some reason."