Blatantly copied from the yank MkV forum, but they claim improvements with the following simple modifications. Can anyone elaborate further as to the why's and wherefor's of such changes and any benefits associated with them, perhaps someone on here has tried these?.

Spark Plugs:

NGK BKR7EIX (Iridium, one heat range cooler than factory plugs)

Diverter Valve:

Revised "C" Diverter Valve - 06F 145 710 C

New "Improved" PCV Valve and Related Parts

Valve - 06F 129 101E

Hose - 06F 103 215A

Gasket - 06F 103 483E

Something I shall tell my Dad when he gets his MkV "GIT" (Its what I will refer to him as once he gets it )

I'm not sure about that PCV yet Steve. I am follwing the threads with interest but it seems a little unclear at the moment. The parts were 'issued' by Audi but the VW boys seem to be trying them.

The issue with the PCV seems to be something to do with recirculating waste boost pressure back into the rocker cover. The earler PCV's had a valve in the PCV itself but from what I can see the revision has the valve in the hose instead.

There may also be another gasket required where the hose fixes to the Turbo.

The Diverter valve is the C revision which has a neoprene bellows.

Fitted to the Turbo to electronically control boost pressure, bit like an electronic dump valve.

The Diverter valve is the C revision which has a neoprene bellows.

Fitted to the Turbo to electronically control boost pressure, bit like an electronic dump valve.

What revision do we have?.

What revision do we have?.

'C'

'C'

I did have B, upgrading to C made no difference.

PCV? What does that do then.

The book quotes -

Crankcase Ventilation

The crankcase is maintained in a constant vacuum while the engine is running.

The crankcase breather that supplies this vacuum is connected to the intake manifold.

The crankcase blow-by gases are separated in two stages. In the first stage, the primary oil separator in the oil filter module takes most of the oil out of the gases.

A second separator in the cylinder head cover removes the remainder of the oil from the gases.

Since a turbo engine requires a more sophisticated pressure control system, a two-stage pressure control valve is located on the cylinder head cover. If vacuum exists in the intake manifold, blow-by gases flow directly into the intake manifold.

If a boost pressure is present in the intake manifold, a one-way valve in the pressure control valve housing closes and the blowby gases flow into the cylinder head cover ahead of the turbocharger.

The system can detect faulty installation of the pressure control valve.

I did have B, upgrading to C made no difference.

Car came with a B valve. Diaphram ripped.

Replaced with c valve,

Seems diaphram has ripped again (loss of power above 5k with boost turned up).

got a spare c valve here which I need to get fitted! Tried doing it myself but couldnt reach!

I got hold of a spare to keep in the garage too just incase I get stuck.

I've fitted a couple of Forge BOV's on the Octy's and it's much easier from underneath.

I got hold of a spare to keep in the garage too just incase I get stuck.

I've fitted a couple of Forge BOV's on the Octy's and it's much easier from underneath.

Yes I jacked up the car etc, but couldnt get a good grip of the bolts on the valve, and was all a bit too awkward

Yes I jacked up the car etc, but couldnt get a good grip of the bolts on the valve, and was all a bit too awkward

Try using an allen key. It's nice and small for the limited space down there and you can get decent leverage with one. I found trying to use a rachet and extention was just impossible for the space you have.

Try using an allen key. It's nice and small for the limited space down there and you can get decent leverage with one. I found trying to use a rachet and extention was just impossible for the space you have.

Yes Thats what i tried mate

I use these, I have them in the longer version too -

Draper Tools Online Product Inquiry

Draper Tools Online Product Inquiry

And this is where I buy them from -

Draper 12837 6MM - 12MM 7 PIECE HEXAGON BIT SET AND HOLDER 1/2" SQUARE DRIVE from Lawson HIS UK

Draper 12197 7 PIECE 1/2" SQUARE DRIVE METRIC HEXAGON BIT SET from Lawson HIS UK

Anyone have any experience or comments of the 'Iridium' spark plugs?. Just wondered how/if they would make a difference.

Quick question to ppl who have installed a dump valve (BOV), is it really audible? I mean can you really hear the air discharge? And was it easy to install?

Quick question to ppl who have installed a dump valve (BOV), is it really audible? I mean can you really hear the air discharge? And was it easy to install?

Ooooh yes, very audible

I have the adjustable one which means you can have Atmospheric, Semi-Atmospheric or Recirc so you can switch it off if it becomes tiresome

As for the install I believe it's a little bit awkward but I had a very nice man do mine for me

You also get a similar noise from the neuspeed P-flo induction kit (which I Prefer )

how can you get that noise from induction kit? I thought the pssss you hear the the noise of the air being dischared from the turbo system?

Not sure how it works, but when engine is on load, ie; accelerating; you can here the sucking in noise, then when you let off the throttle, you hear the loud psssssst.

No idea how it works though

Dump Valve is situated near the filter, which of course amplifies it.

Dump Valve is situated near the filter, which of course amplifies it.

The 'diverter valve' on the 2.0T is different from the old 1.8T if thats what your referring to. its bolted to the side of the turbo.

Blatantly copied from the yank MkV forum, but they claim

Beware of anything that is claimed by US car obsessives.

They all think they are cool engineers but usually are bored teenagers with too much money to chuck at the latest snake oil offerings, and the US is a land built out of snake oil, and absolutely love loads of b*ll*cks! (no offense meant - I used to live there and have loads of american friends).

What are the indepently verifiable benefits of any of the listed products? If your car has a fault becasue you haven't got the latest enema hose or depleted uranium ECU casing fitted, why don't you just get the dealer to fix it under warranty?

Anyone have any experience or comments of the 'Iridium' spark plugs?. Just wondered how/if they would make a difference.

Well, Iridum has 77 protons and 115 neutrons and melts at 2410C, and Platinum has 78/117, and melts at 1772C giving platinum a higher atomic mass and lower melting point. Other than that they are similar.

Obviously the benfits are a weight saving, plus when you have over-turboed the engine until it completely melts to a runny goo, then the iridium tips on the plugs are more likely to still be usable for your next doomed project.