Compressor Surge R32 Gtr

[GTR207]

Hey guys, recently got my head rebuilt and headgasket replaced on my 32 gtr. Since the rebuild the car has been set to stock timing to run in before a new tune, noticing i got lots of compressor surge. Mostly between 2-3k rpm sometimes above. Reset the car to it's previous tune (prior to head rebuild) to see if anychange but nothing. I cant see anything out of place and the car is running n1 turbos and stock bov's, can anyone shed any light for me or point me in the right direction on how to fix this problem?

[Badgaz]

What do you mean? Are you sure your Bovs aren't just louder now?

[Blackkers]

What do you mean by compressor surge? is it a weird noise or something?

[Badgaz]

I reckon you might just have more flutter with the bovs

[niZmO_Man]

AFMs?

[GTScotT]

Please explain the compressor surge phenomenon... What do you feel it is doing? Huffing like Darth Vader or something else?

[GTR207]

Darth vader huffing would be the most appropriate word for it, coming on boost the bovs open and shut constantly until above 3k then hold and boosts correctly, took the car to a tuner and they identified it as compressor surge during the test drive and they werent even able to give me an answer on how it's corrected so it's a little concerning

[Badgaz]

Is this under Wot conditions or in light or partial throttle?

[GTScotT]

Darth vader huffing would be the most appropriate word for it, coming on boost the bovs open and shut constantly until above 3k then hold and boosts correctly, took the car to a tuner and they identified it as compressor surge during the test drive and they werent even able to give me an answer on how it's corrected so it's a little concerning

OK.

Darth Vader huffing is a common GTR problem called turbo shuffle. It is most pronounced on larger twin units (GTRS/-10s) but evident on even small upgrades like the N1s and HKS 2510s. I have personal experience with shuffle using 2510s and it was very amusing.

I have also known of a car with -10s to eliminate shuffle through the tune, but a retune at a different shop brought it right back.

So seeing as you have reset the tune it is obvious to me that you are simply experiencing shuffle which your old tune had cancelled out. A quick search will bring up HEAPS of results.

http://www.skylinesaustralia.com/forums/topic/429218-r33-gtr-running-20-psi-boost-issues-video-inside/?hl=%2Bturbo+%2Bshuffle#entry7207476

http://www.skylinesaustralia.com/forums/topic/419626-rb26-manifold-with-balance-pipe/?hl=%2Bturbo+%2Bshuffle#entry6806082

http://www.skylinesaustralia.com/forums/topic/398415-rb26-twin-turbo-shufflesurge/page-6?hl=%2Bturbo+%2Bshuffle#entry6350006

http://www.skylinesaustralia.com/forums/topic/340270-is-is-compressor-surge/page-2?hl=%2Bturbo+%2Bshuffle#entry5701590

Get reading and good luck!

[GTSBoy]

Sounding like shuffle, no?

-edit: beaten.

Edited May 29, 2014 by GTSBoy

[GTScotT]

Sounding like shuffle, no?

-edit: beaten.

Don't worry, I am even surprised I was the first. By the time I was bothered to open the thread I thought it would have been resolved ages ago.