Weird sound after V8 4plus tune

[racingmason23]

I was just wondering if any of you have had what sounds like compressor surge or a cell phone alarm from under the hood. I hear it right before the bovs open under heavy load when lifting off the gas. I have checked all the charge tubing and swapped out a different set of bovs, and I also tried vta and recirculating them but I still get it. Im seeing 15 psi of boost and the turbos just scream under wot condition.

I have contacted LMS and I am working on getting a video for them. It goes away if I revert back to the v7 map and put the 2bar map back in. I love this tune and the service LMS has given me is top notch. I am not disappointed with it I just want to make sure something isn't going to go kaboom.

 

[ecoboostsho]

Its normal. Well at least a bunch of us have it. I'm convinced its the blow off valves as well. No problems so far!

 

[racingmason23]

Probably exceeding the rating of the bovs.

 

[wasinger3000]

I'm at 18 psi with no odd noise on lift. My bov's are vta as well.

 

[SHOdded]

Some users have reported hearing a honk or similar duck-y/geese-y sound with the 4X; perfectly normal.

 

[ecoboostsho]

The sound happens with very little boost. The wastegate is going to 100% at very low throttle levels to build boost.  I wonder if it is related to that? Mine doesn't do it at full on boost levels (at least I don't think so). 

 

[glock-coma]

http://youtu.be/v4Nz2MeLA1E

Here's an unleashed video. Does it sound like this?
This is exactly how mine sounds.  I'm pretty sure it's normal because of the higher boost pressure. I saw 16.7 yesterday.

 

[bamsho]

What the heck was that.  Mine doesn't sound anything like that.  Just the normal PHHHT when I lift at WOT.  I'm running the 4X 3BAR.

 

[painterpatt]

Mine makes the same sound as glock-coma's. Love it heh heh. let off right after a shift or right before you get 2 very different noises