Ok..... I am trying to work on the plumbing on the -SE Boost and have ran into a slight problem. To keep it looking original and to keep the A/F meter in place. Where can I mount a BOV? My thoughts are if I mount the BOV before the A/F meter, the A/F meter will not allow air back through to even escape through the BOV. I really wanted to keep the Plastic arm on to keep it looking as original as I could but it looks like I might have to fab something up here. Does anyone have an suggestions on where I might be able to mount the BOV and keep most of this stock? I was looking into the Greddy Type S BOV. And if there is no ideas on how I could keep a stock set up, anyone know where I could locate some Aluminium piping to replace the Plastic Arm. Attached is a picture of the Turbo Bolted up. I need to get down there and take some more recent ones. A little more done to it since that Pic.

keep r0tating,
Mike

 

No One...........?

 

Uhhh,hmmm.By your post,Im not sure how you have your plumbing situated,but heres some basics.

The order of the plumbing for an AFM equipped turbo setup....
Filter
AFM
Turbo
BOV
Intercooler
Throttle body
Intake manifold

Putting the AFM after the turbo has been done,but its not a good idea for several reasons.First,the AFM is designed to work under suction,not pressure.The door will be pushed open furthur by artificially pressurized air being pushed through,than by suction drawing it open(IE, atmosheric pressure pushing it open,which is how it was designed to work).Second,the AFM has an ambient air temp sensor in it.Pressurizing the air heats it up,which will alter the reading by the AFM.The ECU will think the outside air is warmer than it is,and it will cut fuel delivery accordingly.
The BOV can be placed anywhere between the turbo outlet and the throttle body.But for an AFM system its better to have it close to the turbo.Reason is,AFM systems meter the air thats injested by the engine.If you release any of the air into the atmoshere after its metered(when the BOV opens) then a portion of the air that was metered,is no longer in the system.But the computor doesnt know this,and it assumes the air that was released is still on its way to the engine,so it continues to pump in fuel.This can cause backfiring,flamethrowing,blown cats,fires,tickets,and other bad stuff depending on you setup,law enforcement and entertainment values!
The proper way to setup a BOV would be to recycle the BOV air back into the intake after the AFM, but before the turbo inlet.This is how the TII comes from the factory.In fact,a stock TII BOV (turbo bypass valve) is a cheap and easy way to prevent compressor surge and get the BOV sound, if that floats your boat.A TII turbo outlet pipe will also make plumbing easier because it has the stock BOV fitting on it,and itll adress the first part of your IC plumbing.