BoV for polo gti?

[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.

[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 ?

[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)

[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...

[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?

[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.

[shhplit]

is the tightest setting done turning it clockwise?

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

[Blitzen]

I run mine about 20 clicks from the tightest setting.

[noone]

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.

What settings are people using for the adjustable spring load on the Forge Dual port units?

I had it wound fully clockwise and it had a flutter effect. On a medium setting (about 20 clicks anti clockwise) made a normal noise, but seemed like it might be loosing a tiny bit of boost.

Would the flutter effect when backing off the throttle have a negative effect? Quite liked the novelty...

[Blitzen]

Run rich enough and long enough u will... and if too much unburn petrol gone in to exhaust, u may not even need to physically gut ur cat (darn the RSPCA again lol), the car will back fire an blow the cat to bit.

Yeah...already sorted...I did a bit of reading up about it, and talked to a few of the boys at work...was just something I didn't realise at the time(W don't have Cat Converters on the Diesels we work on...But some of the Diesels comming out these days do have them fitted as well as Carbon Canisters).

[GTIJNR]

How will this clog your cat...? Unless you are running Leaded petrol, it won't happen...

Run rich enough and long enough u will... and if too much unburn petrol gone in to exhaust, u may not even need to physically gut ur cat (darn the RSPCA again lol), the car will back fire an blow the cat to bit.

[Blitzen]

looking for the turbosmart kompact dual port. anybody on here selling these?

Not that I have seen, but one of the guys(Polo GTI) is running one...I am running at Forge BOV,http://www.forgemotorsport.co.uk/con...FMDVSPLTRwhich you can get through Shaneth or Ian at www.rennenhaus.com.au.

[WHTPOLOGTI]

looking for the turbosmart kompact dual port. anybody on here selling these?

[Blitzen]

Nothing a soft blow hammer wouldn't fix!!

[Bubu]

How will this clog your cat...? Unless you are running Leaded petrol, it won't happen...

I cant say I have ever seen it happen but I do believe it is possible.

Here are a couple of references:

http://www.repcoservice.com/index.cfm?objectid=A97CE7D7-E081-51EF-A7B2BC4DBDF2FB4A

http://www.racq.com.au/cps/rde/xchg/racq_cms_production/hs.xsl/Motoring_Maint_Repairs_Foun_factsheet_catalytic_converters_ENA_HTML.htm

http://www.surefloexhaust.com.au/cc.htm

http://www.ausubaru.com/forum/showthread.php?t=5766