From my experience it depends how you drive the car. If you have the second port open to atmosphere and you drive on really low boost on part throttle than it will flutter, just like other BOV's. The reason being is that the little hole on the bottom is blocked which is now the new port. This little hole is what permits boost to actually "push" the valve open quicker. Driving hard theres no problems because the vacuum and the pressure in the pipes will allow the valve to open quickly. Its one quick Pshhh. Its alittle louder too.
I tried it with "open to atmosphere" and did not like it too much as I drive easy sometimes. I rather have the pressure Valve to control low boost/DD driving habits.
As for negative effects...There are none that I have experienced.
If you use the second nipple direct, than its the same as if you did not do the mod. The nipple is there as an option when this mod is done.
If you do want to use the second nipple than you can either use an automatic pilot valve (like Dejon Powerhouse setup) or you can do a switched type of valve/solenoid where it is either on (boost travels to the nipple) or off (nipple is technically open to atmoshere) (Gus Mahon idea)
Edit: The second port has to be hooked up to "Boost Only" source. Not Boost/vacuum.
Thank you very much guys. I am gonna try this mod tomorrow and see how it works out for me. My car is not a DD so Im just gonna block it off and see how it does. Will that work? Or do I have to drill the hole in the flange?
Thank you very much guys. I am gonna try this mod tomorrow and see how it works out for me. My car is not a DD so Im just gonna block it off and see how it does. Will that work? Or do I have to drill the hole in the flange?
From what the thread says, it need to be hooked up to boost only, so the source would need to be from somewhere between the J-pipe to the elbow.
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