Announcing TopgunZ ACE Supercharger Kit!

Optimiser

That's exactly the same noise I get from the Tial BOV tht came with my A to A kit. The difference is that yours seems to happen much more often than mine, even when you change gears. Mine ONLY happens when I'm cruising along at a steady 100KMH (60MPH in "Retardistan" and I'm at 0 on my boost gauge. With those conditions in continually makes the same noise as yours.

DUSHER

I'm assuming you haven't resolved the issue yet?

Optimiser

No I have not.
My shop confirmed that was the noise I was hearing. The noise doesn't worry me as it only happens in occasional circumstances. I believe it's just the BOV's normal behaviour in my A to A setup.

redondoaveb

Compressor surge?

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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

Optimiser

According to that article isn't that what the BOV prevents (compressor surge)?
Assuming the BOV is working properly and has the correct spring for the application.
My guess is that when the "fluttering" noise occurs, it's from a condition of zero boost /vacuum and the particular BOV's spring allows the valve to open and close a small, fairly rapid amount because in those conditions it's getting some sort of oscillation between tiny boost and tiny vacuum (neutral).

redondoaveb

Yeah, that's definitely what the bov should prevent. Not being a supercharger expert by all mean's, could the placement of the bov have an effect on it's efficiency?

I was getting fluttering when I had my qrj installed. I replaced the 1.5 psi spring with a 3 psi and it was fine after that.

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Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo
750whp/700ft.lbs

Optimiser

I don't know about the efficiency/effect of where the BOV is placed in relation to the particular setup.
As far as different BOV/PSI spring rates are concerned I thought you have to use the one the A to A kit comes with as it's designed for that setup and that changing it will affect how the whole system works properly or not.