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Showing results for tags 'blow off valve'.
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Hey, I have a BA mk2 turbo and I noticed about a month ago the turbo was fluttering when I drove it hard. The car HAD just the factory diverter valve installed. So I assumed this was on the way out (being a 2004 car) and I bought an atmospheric BOV for the sound and to hopefully stop the fluttering. The BOV is nothing special, just a $40 one off eBay that said it was compatible with my car. I put it on yesterday and no matter how I adjust the spring, under high boost, the turbo will flutter. This is the part that confuses me when I sit at 1700 revs I can hear the BOV is open no matter how stiff or soft the spring is but then I also assume it isn't opening enough when I come off the throttle, pushing air back into the turbo and making it flutter. The flutter only occurs when I floor it. Otherwise the bov will vent correctly. So I was wondering; is the issue something like the bov not being wide enough? did I jump the gun on assuming the turbo flutter was an issue? (I've heard some cars just do it) should I try a different spring and lubricate the piston of the bov? Or just bite the bullet and get a decent one? Any help would be appreciated, cheers
