What is TURBO FLUTTER & SURGE? Is it Bad?

Myth-busting in our Nissan R32 GTR!

2y ago

14.4K

Big Single Turbo JDM Import Nissan Skyline R32 GTR - flutters, compressor surge and technical tuning chat.. What is it, how does it hurt your turbo, and does it happen?

Filmed in the StreetFX Forza GTR.

Update

We accidentally say "Blow off valve" during the video at one point when meaning "Throttle body" closing, this is obviously an error. A blow off valve helps alleviate the pressure in the intake during closed throttle surge, "blowing off" excess boost.

IMPORTANT SECOND UPDATE:

We touch on the difference between open and closed throttle flutter. As an additional bit of information here, it was pointed out to me that closed throttle flutter is actually known as "reversion", whereas open throttle flutter is more accurately called "compressor surge".

Both are technically compressor surge, and both sound essentially the same, however the different conditions under which they occur are important to identify.

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Comments (7)

  • I don't ever want to hear that noise coming from my car. If my bov isn't opening, we've got some problems, and potentially expensive ones...

      2 years ago
  • "I actually like that sound" I.e. "I'm a douchebag"

      2 years ago
    • hahaha. It just seems unnecessary, and increases wear on your turbo. ...Which may not matter if you have a racecar and it needs a rebuild often anyway.

        2 years ago
  • You guys just explained something I’ve been worried about in my car for over a year. Open throttle turbo surge.... my car does that and I always wondered why. Thanks.

      2 years ago
  • won't someone please think of the pidgeons.....

      2 years ago
  • More often than not it's the wastegate system. Listen to a city bus, or large construction rig. They make the same noise. No blow off valve, just wastegate.

      2 years ago
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