Lower BOV nipple.. Uses????

[Drift_SM]

Every one knows the the type s BOV has the 2 nipples on the back side of the BOV, the top one is for the intake manifold hose. But what is the smaller (skinnier) nipple for right below it?

I searched and found only one good use, that you can connect it to an intercoller pipe..?

Other then that just plug it.

What happens if you dont plug it?

Whats that nipple for?

 

[Scott_S]

IIRC its to help the valve move faster. Everyone that I've talked to doesnt plug it in including me

 

[diablos991]

It helps prevent compressor surge by using a pressure source to help open the BOV faster. You could tap it into the IC piping, but I have mine tapped into the compressor housing and it works like a charm.

EDIT: It makes the BOV alot louder as well. Another plus

 

[housegsx]

Just leave that smaller nipple below alone. No vaccuum line to anywhere and do not plug it.

 

[Sivad87]

Every one knows the the type s BOV has the 2 nipples on the back side of the BOV, the top one is for the intake manifold hose. But what is the smaller (skinnier) nipple for right below it?

I searched and found only one good use, that you can connect it to an intercoller pipe..?

Other then that just plug it.

What happens if you dont plug it?

Whats that nipple for?

If i remember correctly its to help the BOV actuate quicker. and your not suppose to plug it, your suppose to leave it open. bad things can happen if you plug it.

Hooking the bottom nipple to an intercooler pipe puts pressure on the bottom of the diaphram. and so does the top one (intake mani source) so there is equal pressure on both sides, and the spring keeps it closed. so now what happens when the intake manifold sees vac? low pressure on top side of the BOV diaphram and high pressure on the low side. causing you guessed it a super quick release.

Hope that explains things somewhat

 

[Gamble97]

would it matter, hot side or cold side for intercooler piping?

 

[dr1ftx3]

Is this possible at all to do with an RS, I really want to do it. But there is no second nipple. just a very small hole under the first line.

 

[Drift_SM]

So it sounds like if i hook this up its going to benifit me a little bit.

can I connect it to the compressor housing like said above? thats basicly an inter cooler pipe correct? its a boost source.

let me know.
Thanks every one.

-alex

 

[Sivad87]

So it sounds like if i hook this up its going to benifit me a little bit.

can I connect it to the compressor housing like said above? thats basicly an inter cooler pipe correct? its a boost source.

let me know.
Thanks every one.

-alex

you can hook it up to and boost source that is before the throttle body but after the compressor housing (obviously) so the j pipe, the intercooler just before the tb, anywhere you choose. doesnt matter hot or cold side.

 

[diablos991]

can I connect it to the compressor housing like said above? thats basicly an inter cooler pipe correct? its a boost source.

I have never had a problem with my setup. Even when I spliced into the compressor housing line that connects to the boost controller.

 

[diablos991]

you can hook it up to and boost source that is before the throttle body but after the compressor housing (obviously) so the j pipe, the intercooler just before the tb, anywhere you choose. doesnt matter hot or cold side.

Why does it have to be after the copmressor housing?

 

[Drift_SM]

Why does it have to be after the copmressor housing?

im asking this to.

basicly what it comes down to is...can we use the small nipple on the bottom of the compressor housing?

 

[EclipseTrbo420A]

im asking this to.

basicly what it comes down to is...can we use the small nipple on the bottom of the compressor housing?

yes.

http://www.dsmtuners.com/forums/showthread.php?p=50348506#post50348506

 

[CanadianTSi]

Hooking up the 2nd nipple makes the BOV hold less boost.

 

[99gst10]

I know this is an old thread but i had a question like this and just so I got it straight. My top one goes to intake manifold and the bottom one leave unplugged and not ran to anything? Mine was plugged when I got the car...

 

[dsmrollerz90]

I heard that this is where your supposed to hook of a boost controller, It doesnt work.. I guess leave it un plugged but what are we supposed to hook up a MBC on the PR FMIC kit?