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Stock Blow Off Valve Can't Keep Up


cods4

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So my gc8 is running E85 and is tuned to about 1.4 Bar of boost. I've recently noticed a bit of a compressor surge sound when I lift off during peak boost and when the BOV opens. Is it possible that the stock plastic BOV isn't able to keep up with the extra boost? Or is it likely there is a problem with the BOV or vacuum system?

Also, if I were to run normal bang bang Anti-Lag with the throttle kicked would this fix the problem and almost make the BOV redundant because the excess pressure can get past the kicked throttle?

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So the specs are

V4 STI

Fully forged internsls and closed deck block. Built by PBMS

TD05-16g turbo

ID1000 injectors running E85 - and supporting fuel system etc

V7 STI top mount intercooler. Modified to fit and to use old style plastic BOV

Stock headers, Siamese downpipe and quiet, slightly restrictive exhaust

Link G4 ECU tuned by E&H Motors

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Try 2x stock bovs. Seems odd as turbos to small for engine as it is. Wouldnt be flowing much more air than a tuned stock sti.

Is bov venting or plumb back?

Is the noise the chirp chirp dose pipe sound? No proper comp surge coming onto boost?

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