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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Flutter With HKS BOV @ 21psi



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      08-30-2019, 04:06 AM   #1
McLeanSC
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Drives: 2007 335i Coupe Sport
Join Date: Feb 2017
Location: Scotland

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Flutter With HKS BOV @ 21psi

Car IS FBO w/ inlets, outlets and PR coils. Peak boost is 21psi on a custom Wedge Tune.

Is anyone else running 21psi with a HKS (genuine) and having pretty bad flutter between shifts (auto)? I'm running a 5mm vac line but can't go any larger as the nipple on the BOV itself is tiny, the 5mm needs a zip tie to hold in place, would be pointless fitting a new nipple on the manifold if I can't use the 6mm vac line.

I'm starting to think I should have went Tial.
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