Who makes this BOV

[OMZIG123]

My car has an aftermarket BOV that I cannot seem to find any information on or who makes it. On the top is say SOS

I would like to know how the setting screw functions for one thing. And is this the stock 2g setup (mounting)

 

[eboy0]

Looks like a Greddy type S knock off.

 

[DGajre777]

Greddy Type S with SOS on it or a greddy type S knock-off.

 

[daren_p]

Yeah, thats the standard Greddy type S knock off. & you would adjust it the same way. The threaded rod is the adjuster & the bolt locks the adjustment in place. Tigher will hold more boost but if you tighten it too much it won't blow off properly. Usually you want it adjusted as lose as possible that will still hold the amount of boost you want to run. If you don't get one solid release of air when at full boost, its adjusted to tight.

 

[OMZIG123]

Yeah, thats the standard Greddy type S knock off. & you would adjust it the same way. The threaded rod is the adjuster & the bolt locks the adjustment in place. Tigher will hold more boost but if you tighten it too much it won't blow off properly. Usually you want it adjusted as lose as possible that will still hold the amount of boost you want to run. If you don't get one solid release of air when at full boost, its adjusted to tight.

Alright thanks. Mine is working properly as I can hear when I let off the gas when it's boosting. I am guessing turning the screw in (clockwise) will increase the pressure before it will bleed off. Is that how the greddy adjusts?

 

[DGajre777]

"The GReddy valve has two fittings for small vacuum lines on it. The top fitting is for the same hose that went to the original stock bypass valve, the hose that goes to the intake manifold. The lower fitting is normally left open. It is a vent for the lower chamber of the valve.

The GReddy Type S bypass valve is adjustable. To make the adjustment, looses the 10 mm nut on the top of the valve. Using a 3 mm Allen wrench, rotate the small screw in the center. Looses it all the way out until you feel no tension on it. That is the maximum looseness possible. With the screw all the way flush with the top of the nut, that is fully tight. Normal adjustment for most cars is right about in the middle (see photo above). If the valve is too loose you may loose boost pressure. The valve will close slowly and will make a little squeak sound at the end. If it is too tight, you will hear compressor surge. Surge sounds like a "JUhh juhh juhhew" sound when you let off the throttle. It may sound cool but it will damage your turbo. That is the sound of air bouncing off the throttle plate and going back out the turbo as it is also being pumped in... too tight."

http://www.roadraceengineering.com/instructions/rreicpipeinstructions.htm