GFB DV+ OEM Diverter upgrade kit

[Hurdy]

Some K04 cars have been causing problems. The solution is a stronger spring and this will be supplied with all the kits in future. For anyone having a problem with a K04 they can get the modified spring from their supplier.

Thank you for that, I'll contact GFB direct and see what happens. When/if I get the stronger spring I will give it another attempt and feedback my findings.

[Hedge]

Ok i will be the first to say it. 

So what are they going to call this new revision when it comes out. . 

DV 2+?

[Bncy Wäbit]

This was sent to me as a reply on a request for my edition 30 from a UK shop:
"
Sorry but we are finding issues with them fluttering on the K04 cars,
however GFB are now aware and a new version willb e here in about 3
weeks :)
"


Sent from my iPad using Tapatalk

[TT-Turbo]

I thought I would add a response straight from the horses mouth. I have been in contact with the guys at GFB for a few weeks now and asked about the recent situation. Here is some of the response;

----
It appears that the factory remote diverter valve mounting block runs a larger diameter inlet bore than the turbocharger compressor mounted models. This is a concern as it actually plays a huge part in the valve area ratio of the forces acting on the DV+ piston. Although it is not a problem on all of these vehicles, this is still not acceptable. We have seen factory mounting block diameters ranging anywhere from 18.8mm to 19.7mm, so there clearly is a tolerance issue on the factory part which we must work with. Essentially, what is happening in the practice is these remote mounted units are only just partially trying to open the DV+ piston due to the incorrect piston/face area ratio. This is only with higher than stock boost levels. Still not acceptable.
 
Our solution: We have nearly completed an almost identical design DV+, but using a larger piston diameter. This will completely eliminate any issues, and ensure 100% fitment on every vehicle remote mounted diverter valve. These New DV+ replacements are approximately two weeks from being available. The current DV+ will continue production unchanged for all VAG vehicles fitted with direct turbocharger mounted diverter valves.

---
That was a week ago now so they may have adapted this further. The engineer there seems a pretty switched on guy so confident they will get on top of it pretty soon.

My DV+ arrived in the post the other day and will be fitting it on the weekeend 

[jon-tfsi]

This looks like a good product, it must be a bit embarrassing for them that the R&D is being done after its hit the market though. The price isn't going to break the bank but does seem quite steep when you look at what's included in the kit.
Its not like they can blame the price on "Product Development" like APR do.

[Vasekk]

They should sell it with their own housing to prevent tolerances issues. Something like this product http://www.kmdtuning.com/index.php?_a=viewProd&productId=2443&catId=saleItems

[Mikeygtir]

so... the long and short of it is (as i understand it)

The DV+ works grand on the K03, if a little more noisy than stock, so perhaps not to everyones taste.. but doesnt work as effectively on the K04 due to differences in the production diameter of the sealing faces

Overall its a decent product?

Whats the lead time on these.. ie if i was to order from Balance.. how long to deliver? looking at the site today.. it looks about £105 all in (shipped to UK address)

Is there any word on a GB.. if so.. what kind of reduction would we be talking about?

[TT-Turbo]

so... the long and short of it is (as i understand it)

The DV+ works grand on the K03, if a little more noisy than stock, so perhaps not to everyones taste.. but doesnt work as effectively on the K04 due to differences in the production diameter of the sealing faces

Overall its a decent product?

Whats the lead time on these.. ie if i was to order from Balance.. how long to deliver? looking at the site today.. it looks about £105 all in (shipped to UK address)

Is there any word on a GB.. if so.. what kind of reduction would we be talking about?

The idea behind it all seems to be a solution to a handful of problems. If they can crack the fitment for the K04 as well then it could be a must do mod. Not a crazy amount of money relative to other aftermarket "solutions". Fitment is easier than other systems that requires vacuum hosing and if the benefits of reliability and added performance then great! Will test this out myself and see what it's all about, hoping to solve a turbo lag issue after quick high boost gear changes and if this solves it then happy days!

I would hang fire on a GB until the K04 version is available otherwise getting number will be tricky. Usually 5-15% is the normal sort of range to expect.

[E30Dom]

I've got an Evoms DV on mine now

This is the one to go for, but at the time I could never get hold of one... are they more readily available?

[BalanceMotorsport]

I thought I would add a response straight from the horses mouth. I have been in contact with the guys at GFB for a few weeks now and asked about the recent situation. Here is some of the response;

----
It appears that the factory remote diverter valve mounting block runs a larger diameter inlet bore than the turbocharger compressor mounted models. This is a concern as it actually plays a huge part in the valve area ratio of the forces acting on the DV+ piston. Although it is not a problem on all of these vehicles, this is still not acceptable. We have seen factory mounting block diameters ranging anywhere from 18.8mm to 19.7mm, so there clearly is a tolerance issue on the factory part which we must work with. Essentially, what is happening in the practice is these remote mounted units are only just partially trying to open the DV+ piston due to the incorrect piston/face area ratio. This is only with higher than stock boost levels. Still not acceptable.
 
Our solution: We have nearly completed an almost identical design DV+, but using a larger piston diameter. This will completely eliminate any issues, and ensure 100% fitment on every vehicle remote mounted diverter valve. These New DV+ replacements are approximately two weeks from being available. The current DV+ will continue production unchanged for all VAG vehicles fitted with direct turbocharger mounted diverter valves.

---
That was a week ago now so they may have adapted this further. The engineer there seems a pretty switched on guy so confident they will get on top of it pretty soon.

My DV+ arrived in the post the other day and will be fitting it on the weekeend 

having spoken with GFB today the new piston (although tested) won't be used as the spring solves the problem.

They sent me this "The position is that initially when a couple of cars had a problem, we found the very large factory tolerance of the inlet bore and position. We assumed that this what was troubling a handful of cars. When investigating further, we also found a large tolerance in the factory spring rate also. The inlet bore proved to be no real problem for our original piston. There are very few cars which have a spring rate that is not up to the job, which is not highlighted with the OE valve because it leaks so much anyway.

We have now made a new spring to replace the OE spring that will be distributed to anyone who needs it within 10-14 days.

Please bear with us as we come to grips with VAG’s manufacturing tolerances."

re delivery times - i have them in stock
re GB discount up to 5 units - 5 % over 10 -10 % max - the margins in this product are small and no different to a more expensive product - give any more than this away and it simply isn't commercially viable to sell. This market isn't like childrens toys where they make them for a £1 and sell them for £10!

[Tfsi_Mike]

Alex pointed me back to my own thread after I called him with some boost related problems.

I need to re-read the recent posts properly but it seems people may have had a similar problem.


I did nearly 80 miles on Cadwell Park and the car felt really strong.  Nice steady drive hime and sensible gentle use since then.

Last couple of days the car has felt a little gutless compared to usual.  Peaking 5psi lower than normal and feeling 'less powerful'

With the DV+ being the only recent change on the car, I will revert back to revision G and see if she is back to full steam.

[Tfsi_Mike]

Julian I did say when emailing about testing one of these it might be an idea to discuss DV spring rates with GFB and Niki from R-Tech as Niki has experimented with spring rates on ko3 & ko4 cars. 

May I request the revised spring? 

Hopefully tomorrow fitting my Rev G guts will have the car back to full health so I do'nt have to start chasing my tail.

Wont have time to do any logs now till next weekend.

[RobboGTI]

Is this only a problem on k04?

I'm booking my car in to get my front suspension top mounts changed on Monday and was going to get them to supply and fit me a DV+ for my k03

Should I cancel and just get a new rev G?

[Hurdy]

I've got an Evoms DV on mine now

This is the one to go for, but at the time I could never get hold of one... are they more readily available?

I managed to get one from Statllers, who had them in stock.

[Hurdy]

Is this only a problem on k04?

I'm booking my car in to get my front suspension top mounts changed on Monday and was going to get them to supply and fit me a DV+ for my k03

Should I cancel and just get a new rev G?

You should be okay with the K03. The DV+ was initially designed for it.