my WG AND BOV have 2 lines on it for what????one is for vac and the other....please help

 

 

just use both top nipples you will be fine dont worry about the other ones

 

but what are the others for?????

 

For the wastegate, if using a manual boost controller only use the lower port. The top port is for electronic boost controllers and applies boost to the top of the wastegate to hold it shut.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stockb18c &raquo;</TD></TR><TR><TD CLASS="quote">just use both top nipples you will be fine dont worry about the other ones</TD></TR></TABLE>

You mean, so he can make sure the wastegate never opens and he overboosts? Good call.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Legion &raquo;</TD></TR><TR><TD CLASS="quote">You mean, so he can make sure the wastegate never opens and he overboosts? Good call.</TD></TR></TABLE>

thank you that **** would hav sucked @ss.......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EF EG EK LOVE &raquo;</TD></TR><TR><TD CLASS="quote">thank you that **** would hav sucked @ss.......</TD></TR></TABLE>


Here's an easy way to think of it; both a WG and a BOV are like a straw with a small ball-bearing inside. If you want the ball-bearing to move away from the middle of the straw, you can either suck on one end of the straw of blow on the other end.

It's really just an application of Newton's 1st law: an object at rest only moves when subjected to an unbalanced force. How does this apply? Well the WG has a spring inside that pushes the diaphragm closed. If you want the diaphragm to open, you need to apply a greater force on the other side of the spring, i.e. the bottom port of the WG. The only "force" you have on tap is boost pressure, so naturally, you should apply this boost to the bottom port and the WG will open when the boost pressure is greater than the spring pressure (hence the pressure rating on all WG springs).

However, if you want to run a higher boost than the spring is rated at, you need to increase the pressure on the spring-side of the diaphragm. Once again, the only "force" you have on tap is boost pressure, so you apply (partial) boost pressure to the top port of the WG while also applying boost pressure to the bottom port. A boost controller is used to determine how much boost the top port "sees" to achieve the proper force balance required to run the boost pressure you want.


The BOV functions the same way. Some BOVs only have a single port in the top, so in order to overcome the spring pressure, you need to apply negative force on the spring-side of the diaphragm. The only negative-force you have on tap is vacuum, so you run the port to a vacuum source.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Legion &raquo;</TD></TR><TR><TD CLASS="quote">

You mean, so he can make sure the wastegate never opens and he overboosts? Good call.</TD></TR></TABLE>

LOL