Venting the Stock BPV on an ST205 GT4, Bad or is it ok? Options

[Goonter]

Ive been reading all night about blow off valves and bypass valves. All i seem to read about is bad things (besides the sounds it makes) about blow off valves. Things like you run rich, lose power and crap like that. I wanted to know if this is the same way for 3SGTE ( i would assume so) Also does running rich every time you shift gear waste a noticeable amount of gas?

Also say i don't get a BOV. The BPV is designed to recirc the air back to the intake box. If i get an Apex'i intake filter to replace my box, Is there any way i can recirc the air back to the intake system? (btw I'm just getting the filter. The rubber intake piping will stay. I noticed the BPV is bolted onto the box so i see no way of getting it recirc'd to the intake system unless the piping was metal and a flange was welded onto it for the BPV to bolt onto.

This post has been edited by Goonter: Sep 24, 2011 - 6:08 PM

[jlspec]

What has been said is correct, but I like to add some more.

The reason that the 3rd gen is ok using the BOV is because the map system measures the air as it enters the throttle/intake manifold. In other words the BOV is located before the sensor. The second gen measures the air at the intake which the BOV is located afterwards.

The best solution for the second gen or any system using a AFM is using a aftermarket system like the old HKS VPC. For example the HKS VPC system installs the sensor right before the throttle body and after the BOV.

In any case the BOV is still recommended when using a 1st or 2nd gen 3SGTE due to a lack of a BPV.