sypher_44 Posted October 10, 2008 Share Posted October 10, 2008 (edited) hi i recently bought a hks pro race 2 bov, i installed it and capped off my stock bov.. now 2 the issue. when i let off the throttle it still dumps air out of the air filter, and sometimes it makes a fluttering noise..(sounds like CH.CH.CH.ch.ch.ch) but when the hks bov opens the fluttering noise stops and what i understand its bad for the turbos if its sounding that way?? sorry 4 my english greetings boosting swede Edited October 10, 2008 by sypher_44 (see edit history) Link to comment Share on other sites More sharing options...
SilverSoop Posted October 11, 2008 Share Posted October 11, 2008 hi i recently bought a hks pro race 2 bov, i installed it and capped off my stock bov.. now 2 the issue. when i let off the throttle it still dumps air out of the air filter, and sometimes it makes a fluttering noise..(sounds like CH.CH.CH.ch.ch.ch) but when the hks bov opens the fluttering noise stops and what i understand its bad for the turbos if its sounding that way?? sorry 4 my english greetings boosting swede No I wouldn't worry too much. All the fluttering noise is, is compressor stall or 'comp stall'. When the pressure generated and can't go anywhere else, the pressure goes back through the turbo's but in the wrong direction... Every TT and Single Turbo Supra does this, Ideally, it's not good for the Turbo's but everyone is in the same boat... Hope this helps... Link to comment Share on other sites More sharing options...
edge Posted October 11, 2008 Share Posted October 11, 2008 dumps air out of the air filter?? Have you not FULLY removed the stock bov? And any pics ? Link to comment Share on other sites More sharing options...
mikeyb10supra Posted October 11, 2008 Share Posted October 11, 2008 (edited) There is nothing to worry about at all, its not detrimental to the life, spool etc of the turbos in the slightest. Ive run without a recirc now for a year or so sometimes trashing the shit out of the car at full boost and no problems at all. Its market hype that has created this aura of fear about a little bit of choped up air + from what I remember the hks BOV has a fairly fluttery noise on low boost anyway Edited October 11, 2008 by mikeyb10supra (see edit history) Link to comment Share on other sites More sharing options...
Pabs Posted October 11, 2008 Share Posted October 11, 2008 yep - this sounds like normal hks type noises to me! As above, on low boost I always get the noise you describe. Link to comment Share on other sites More sharing options...
sypher_44 Posted October 11, 2008 Author Share Posted October 11, 2008 thanks guys i actually refitted the stock bov... haha and now of to the garage 2 remove it again... and yes edge it dumps air from the air filter, the hks bov opens a tenth of a second after the air dump Link to comment Share on other sites More sharing options...
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