According to this he says VTA BOV are not really beneficial.
Quote:
Originally Posted by MTZL
I want the bov sound! Can I vent to air/atmosphere (VTA)?
When there is a cut in throttle, the pressurized air needs somewhere to go. When recirculated, this air is reused and sent back to the air intake (and goes through the whole process again). Because of this, your ECU/tune is expecting this recirculated air. When you vent this pressurized air to the atmosphere, you're throwing it away when the ECU is expecting it. This obviously causes stability problems. There's no beneficial point to running a VTA bov setup - other than the sound. If you REALLY want the sound, you can get it from an intake/filter upgrade - I think it's silly to sacrifice performance/stability just for a sound.
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But I read on EvoX that we have both MAP & MAF sensors so the ECU adjusts for it? Or is that only in the EvoX?