Forge DV + Uprated PCV Questions

[Hryszko]

Quick question guys...

My DV and PCV are standard at the moment, can anyone recommend the forge DV? Will I notice a huge difference in it as an upgraded part?

None of them need changing as far as I'm aware but i've already done things like the DSG service, cam follower, engine service etc... Looking at doing some other subtle upgrades and i've heard fairly decent things?

[GitFlog]

GFB DV+  sorted

[Hryszko]

 

GFB DV+  sorted

I think I may have actually meant GFB..... hahah, how much are they/ are they worth it?

[bobby_fodge]

I bought a GFB DV+ a few weeks ago and it was around £100 and the car felt very different after fitting, more urgent, a worthwhile mod that definitely registers on the bum dyno.

[pudding]

As a long term user of a GFB, I had a couple of issues.  A gradual flattening of the responsiveness over time, which I put down to piston binding.  The scoring marks on it certainly add weight to that theory.  And secondly, my orange silicon pad started coming away from the brass piston.  I binned it and went back to a rev G and it feels no different to a new GFB in all honesty.

[GitFlog]

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F263725632183

might be be to get this cheap i cant see many people bidding it up, if your looking for one might save you a bit of cash

[Chesto18]

I bought a GFB DV+ a few weeks ago and it was around £100 and the car felt very different after fitting, more urgent, a worthwhile mod that definitely registers on the bum dyno.

Interested to hear more after replacing a Rev G that clearly wasn’t fitted to the car from factory but was absolutely, totally knackered. There was less than 1mm of the diaphragm still attached, the rest was torn to shreds.

Car is standard but after seeing that I’d want to change it every year at least. Heard great and not so great things about the GFB.

[Chesto18]

I bought a GFB DV+ a few weeks ago and it was around £100 and the car felt very different after fitting, more urgent, a worthwhile mod that definitely registers on the bum dyno.

I bought a GFB DV+ a few weeks ago and it was around £100 and the car felt very different after fitting, more urgent, a worthwhile mod that definitely registers on the bum dyno.

Interested to hear more after replacing a Rev G that clearly wasn’t fitted to the car from factory but was absolutely, totally knackered. There was less than 1mm of the diaphragm still attached, the rest was torn to shreds.

Car is standard but after seeing that I’d want to change it every year at least. Heard great and not so great things about the GFB.

[ROH ECHT]

I run a Porsche DV with a K04 upgrade...it holds 30+ psi and opens under vacuum. It has a DV simulator to prevent codes(pictured below).

But if I was still running the oem DV...I would use the "-D" revision or piston-type and not the "-G" revision if tuned or planning to tune because like the earlier versions the G and its rubber diaphragm tears easily. If stock, I wouldn't care which I personally used...the D or the G.

The GFB DV rebuild kit is over-rated in my opinion as some just have had troubles with it and others have not. May partly have something to do with owners left doing the GFB DV rebuild themselves or perhaps it is the product quality, who really knows? So there you have it...my $0.02.

[Dan_FR]

Leave them all alone. The standard PCV is fine, buy the latest revision new one if/when needed. Don't stick a partial PCV delete plate on there

As for the DV - stick with a G and treat is as a consumable or go for a DV+. Some have had issues, but mine as been fine for the past 2 or 3 years as I got fed up of replacing the Rev G on a K03 car - getting lazy in my old age. If I had a K04 I would have stuck with the G as its a doddle to change

There's no performance gain with a DV+ over a Rev G DV - the midrange response is improved as the ECU doesn't hold the valve open for longer than is needed thanks to the additional spring setup in the DV+. It's a minor improvement though quite noticeable

[colesey]

I too have had a DV+ for a couple of years. No issues and throttle response is snappier.

[Chesto18]

Good to know.

I think I’ll bite the bullet and get a DV+ at some point in the future, but having seen the state of my Rev G, and the colossal effect it had on performance (wouldn’t have lost much more power if I’d taken the turbo off) I’m reluctant to just wait for it to go wrong again.

[pudding]

I run a Porsche DV with a K04 upgrade...it holds 30+ psi and opens under vacuum. It has a DV simulator to prevent codes(pictured below).

But if I was still running the oem DV...I would use the "-D" revision or piston-type and not the "-G" revision if tuned or planning to tune because like the earlier versions the G and its rubber diaphragm tears easily. If stock, I wouldn't care which I personally used...the D or the G.

The GFB DV rebuild kit is over-rated in my opinion as some just have had troubles with it and others have not. May partly have something to do with owners left doing the GFB DV rebuild themselves or perhaps it is the product quality, who really knows? So there you have it...my $0.02.

That looks like a BorgWarner EFR DV?   I'm not that convinced by vacuum DVs on TFSIs personally, though.    There must be a feedback loop from the DV solenoid for the ECU to control the fuelling very quickly, to avoid any over rich spots killing the cats.   Not sure a resistor in a plug has the same affect to be honest?

Agreed on the rev D.  It's the only OEM one that is fit and forget.

[ROH ECHT]

I have contemplated running another revision-D lately just to see if I notice any diff...I had this one since ordering my K04 as you are aware. I could always just keep this as a spare if ever needed. AWE says "it is an older Porsche type DV"...but is likely from a BW turbo and yeah, it could be a BW supplied bit originally for a Porsche.

[Sessions]

From what ive heard rev d is the one to have. i changed mine for the latest rev f or g.
No problems with this. No probs with the c that came off either. Diaphram still all intace