Sheefa Posted November 22, 2016 Share Posted November 22, 2016 Chris on that note, how easy is it to disconnect the BOV? I have dual HKS ones on mine and want to remove as miss the old turbo chatter. Do you need to bung up the intake pipe or recirc somehow? Link to comment Share on other sites More sharing options...
berg Posted November 22, 2016 Author Share Posted November 22, 2016 Chris on that note, how easy is it to disconnect the BOV? I have dual HKS ones on mine and want to remove as miss the old turbo chatter. Do you need to bung up the intake pipe or recirc somehow? /QUOTE] I just removed the bov and pipe it was mounted on and replaced it with a normal piece of intercooler pipe Removed the associated vac hose and job done Link to comment Share on other sites More sharing options...
Style Posted November 23, 2016 Share Posted November 23, 2016 Not exactly Compressor surge, is on boost, when the turbo is out of spec. So it's trying to push more boost than the engine can absorb, so the boost pressure is forced back out through the turbo. When you get the chatter through no bov, when the throttle is closed, it's the pressurised air between the turbo outlet and throttle body that travels back out to the air filter. As the air rushes past the face of the compressor wheel, it makes the 'chatter' noise. /QUOTE] The turbo flutter noise is NOT compressor surge. It is perfectly safe. This is compressor surge which is entirely different. Running no BOV is not an issue and you'll see negligible difference in spool etc /QUOTE] I still think we're talking about the same thing here, both scenarios we're describing is air passing backwards through the turbo because the air/pressure ratio is outside the surge line in a turbo's spec. And that process right there is compressor surge....forgetting about what caused it. Still the same thing. So are we both right? I know it's a BOV site and therefore probably trying to convince you they are necessary, but it basically echos my thoughts: Both scenarios are compressor surge - http://www.gfb.com.au/tech/tech-articles/11-the-truth-about-compressor-surge Link to comment Share on other sites More sharing options...
Mk4Gaz Posted November 23, 2016 Share Posted November 23, 2016 Not really, when you let off the throttle, the air going back across the compressor is only for a split second. Whereas compressor surge, is forcing against the compressor all the time boost is being generated. I'm crap at explaining things, but think of blowing a balloon up. If you blow up a balloon, and then remove it from your lips, the pressure will rush out. The initial pressure is much higher immediately, but rapidly drops. Compressor surge is like trying to blow a balloon up, but the pressure inside the balloon is greater than you can blow, so the air is trying to force past your breath, and inflate your lungs. Link to comment Share on other sites More sharing options...
Sheefa Posted November 23, 2016 Share Posted November 23, 2016 I'm crap at explaining things, but think of blowing a balloon up. If you blow up a balloon, and then remove it from your lips, the pressure will rush out. The initial pressure is much higher immediately, but rapidly drops. Compressor surge is like trying to blow a balloon up, but the pressure inside the balloon is greater than you can blow, so the air is trying to force past your breath, and inflate your lungs. /QUOTE] Pretty good description if you ask me Link to comment Share on other sites More sharing options...
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