2G Blow off valve

[brandons 95]

How do you know how hard to set your bov adjustment with the greddy type rs.

 

[ericbev]

The "harder" the setting (the deeper the adjustment screw. I assume its the same as the type-s), the less prone the valve will be to being blown open and the greater the change in pressure needed to open it. Set too soft, the valve could possibly be blown open under high boost. Set too hard, the valve may flutter or not open at all. Any fluttering from too hard of a setting will be most noticeable during light throttle changes since there is only a small change in pressure on either side of the valve. The more you let off the gas and/or the more quickly you let off, the greater/sharper the change in pressure and the increased ability for the valve to open flutter-free. In short, for the very least potential valve flutter, adjust the spring as light as possible without it being blown open for your setup and boost level. The fluttering sound you will hear is also known as compressor surge and is bad news. So basically, loosen it up enough that you dont hear fluttering at very low throttle releases, but make sure its hard enough that it doesnt start blowing off boost. It shouldnt be hard to find this "neutral" spot. The fulttering is very noticeable and so is the valve blowing off boost. Go on a backroad where its you and the road (nice and quiet), carry the allen wrench with you, and play with it till you are satisfied.

Hope that helps