BoV for polo gti?

[shhplit]

is the tightest setting done turning it clockwise?

Is there meant to be a sound difference? or what does this actually achieve?

[Blitzen]

1) is the tightest setting done turning it clockwise?

2)Is there meant to be a sound difference? or what does this actually achieve?

1) Yes.

2) Holds the boost to your liking.

[noone]

Correct. The gauge changes the amount of pressure required to vent the air, then it is distributed back into the air intake and to atmosphere.

I'm guessing that too much pressure here may have a negative effect on the engine or at least the air flow?

[xtturbo]

Correct. The gauge changes the amount of pressure required to vent the air, then it is distributed back into the air intake and to atmosphere.

I'm guessing that too much pressure here may have a negative effect on the engine or at least the air flow?

IT might cause compressor surge upon backing off the throttle... and whether or not this is harmful to the turbo is the subject of much debate lol...

[Chuck]

I just installed a Forge Duel Port BOV. Took about 5 min to fit. Doesn't sound too bad either. Part Number is FMDVSPLTR.
Check it out here:

http://www.forgemotorsport.com/content.asp?inc=product&cat=260501&product=FMDVSPLTR

With Engine Cover on:

With Engine Cover off:

Looking from the passenger side to the drivers side:


All you need to fit it are: A pair of multi grips to loosen the clamps holding the BOV onto the Turbo Intake Pipe and the line from the compressor side of the turbo
A pair of side cutters to remove the clamp off the vacuum line on top of the previous Diverter Valve.
A zip tie to clamp down the vacuum line onto the new Diverter/Blow Off Valve.
Ian at Rennenhaus can help you getting this part...Costs about $230 to your door. http://www.rennenhaus.com.au/

Or you can have a look at the Turbo Smart Sports Kompact BOV. I was quoted $320 through Auto Bahn. This BOV fits the same as the above instructions. Be sure to get the 25mm openings on that model, as these are the size of the openings on the pipe work in the Polo GTI.
Check that out here:

http://www.potn.co.uk/p1607193.htm

Hope this helps you mate.

PS: I went for the Forge one as it was cheaper, but is also garentee'd not to throw up any ECU codes from the MAF Sensor too.

Been doing alot of forum reading...will the Turbo Smart one make some woosh noises?

How about the forge model?? Makes the wanky sound (which i really want - don't judge me pls)

[DeanB]

Correct. The gauge changes the amount of pressure required to vent the air, then it is distributed back into the air intake and to atmosphere.

I'm guessing that too much pressure here may have a negative effect on the engine or at least the air flow?

IT might cause compressor surge upon backing off the throttle... and whether or not this is harmful to the turbo is the subject of much debate lol...

Am I missing something here ?

I assume if it is dialled to 100% blow off there was a chance (very good) of going into limp mode and getting nice error lights and codes.

However, if it is dialled 100% the other way then surely you can't then have a negative effect because wouldn't it be then working like a full plumback DV ?

[noone]

I assume if it is dialled to 100% blow off there was a chance (very good) of going into limp mode and getting nice error lights and codes.

Talking about the forge one still?

You can't adjust which way the air flows (recirculation vs atmosphere), this is fixed at something like 60% recirc, 40% atmos.

The gauge controls the pressure on the element, making it harder for the airflow or vacum to open the valve.