I am looking at getting a used Forge DV that has been used for about 6000 miles /1 year in a LC.

As my car has done 35k now thought it might be worthwhile to change it.

Your views on:

1/. Is it worth changing compared with standard VAG type. The owner reckons it has on his car that is REVOd.

2/. Does it deteriorate with age, in other words is it better to get a new one and perhaps not a Forge?

Chris

I have one fitted to mine and it made very little differance, it will maybe be more noticable when it is remapped. They can be serviced easily so i wouldn't worry. provided it is the right price.

Not quite sure why this thread is in "My Performance".............as a dump valve makes no difference whatsoever to the performance of a vehicle .................. .........IMHO it only works when your foot is off the accelarator , ie changing gear ..................

You can send them back to Forge for service which is either FOC or very reasonable.

All Forge products are warrented for life.

The Forge guy's are all great, couldn't be more helpful.

and the really really great thing about the Forge valves is that you can tune them to your taste

http://www.forgemotorsport.co.uk/octaviars.asp?cat=skodars&product=FMDVTUN

Sounds like Forge make a good product that is well supported. Whether its worth changing the standard item is debateable although with a Jabba map running higher than normal boost it may be worth trying especially since its only half the cost of a new one.

Thanks guys

Chris

do it, standard ones are rubbish and can leak and lots have failed. won't really gain any performance, the noise changed when i got mine changed and that was about it. if you are running higher boost then surely leaking/failing would be more likely

Bengie,

I have been told to expect less lag and faster reponse so a better drive all round. I'll see if its still available.

Bengie' date='

I have been told to expect less lag and faster reponse so a better drive all round. I'll see if its still available.[/quote']

That's pretty much my experience Chris....could be the shiny toys effect though

That's pretty much my experience Chris....could be the shiny toys effect though

That was Badger Bill who I trust though. Rather have an FMIC Geoff but cant afford it.

That's pretty much my experience Chris....could be the shiny toys effect though

It was sold so will have to save up for a new one (or an FMIC). Never mind.

how can a dv give you better response? all it does it dump the excess pressure on release of the accelerator to stop the turbo stalling and how can it stop lag, it has nothing to do with the actual intke of the air, just the release of it when its not needed/wanted

they ain't lots of money new, think mine was around

how can a dv give you better response? all it does it dump the excess pressure on release of the accelerator to stop the turbo stalling and how can it stop lag, it has nothing to do with the actual intke of the air, just the release of it when its not needed/wanted

Next time SMWBO is drying her hair grab the drier off her and put your hand over the end. You will slow the speed of the fan down. If you move your hand away quickly it will regain speed quickly, move your hand away slowly and half heartedly and it will take longer to spin up.

Now liken this to your Turbo, spinning at great speed and pushing out loads of lovely higher pressure air, and you lift off shutting the air inlet to the manifold (just like putting your hand over the end of the hair dryer) and the air has no where to go - cue Dump Valve. The valve opens and redirects the unwanted pressurised air out of the intake system thus allowing the Turbo to keep spinning and not stall and therefore it can spool up more quickly or to put it another way - with less lag.

There are two main types of DV, Atmospheric (the noisy one) and recirculating (the same as fitted as standard). Both, in aftermarket guise, can work more efficiently than the standard one fitted.

I have the greatest of respect for Forge stuff, SWMBO sells a lot of it and we have no complaints at all.

I know Bailey offer an Atmo valve for the 1.8T engine but Forge don't recommend it as they think it can cause AFM problems. I think it is something to do with the ECU expecting to see the air in the pipe and not wooshing out under your bonnet.

Hi Stu - I tried what you said about putting your hand over the end of SWMBO's hair dryer but all I managed to do was burn my hand - what did I do wrong? :confused:

Hi Stu - I tried what you said about putting your hand over the end of SWMBO's hair dryer but all I managed to do was burn my hand - what did I do wrong? :confused:

...that's a Beemer driver for ya.

Ahh you must have one of those deluxe ones that heats the air too lol

...that's a Beemer driver for ya.

Have you fitted the hairdryer back to front Dave.........That is never going to go away you know. :P

Hi Stu - I tried what you said about putting your hand over the end of SWMBO's hair dryer but all I managed to do was burn my hand - what did I do wrong? :confused:

Presumably the aforementioned hairdryer now sits in someone's workshop awaiting delivery of parts from abroad to get it running again ??

Bengie' date='

I have been told to expect less lag and faster reponse so a better drive all round. I'll see if its still available.[/quote']

I saw better results from my standard DV over my Forge007 in my 1.8T in low to mid range, its only over 5.5K RPM that the Forge has the edge.

Standard DV boost log

Forge 007DV boost log

Presumably the aforementioned hairdryer now sits in someone's workshop awaiting delivery of parts from abroad to get it running again ??

:confused: I drove it today........was a bit rattly at 160 though. :sofahide:

The car that is

:confused: I drove it today........was a bit rattly at 160 though. :sofahide:

The car that is

Must be the standard pistons.

Must be the standard pistons.

Yap, those JE piston are the pits.........a little bit of knowladge :duck:

I saw better results from my standard DV over my Forge007 in my 1.8T in low to mid range' date=' its only over 5.5K RPM that the Forge has the edge.

Standard DV boost log

Forge 007DV boost log

Gary

I'm sure you know exactly what you are doing but from looking at your graphs it looks to me like the Forge isn't tuned correctly, I would say that you are losing top end boost pressure from the valve.

I holds the pressure nice and smoothly from 4.5k onwards (Which it what you pay the money for) but it's the peak pressure where it's lacking.

As your car is 'mapped', boost pressure would have almost certainly been tweaked up, the forge valves are all tuned for standard car setups.

Not trying to dis you or anything - just my interpretation of the graphs, but hey, I only talk hairdryers these days

Gary

I'm sure you know exactly what you are doing but from looking at your graphs it looks to me like the Forge isn't tuned correctly' date=' I would say that you are losing top end boost pressure from the valve.

I holds the pressure nice and smoothly from 4.5k onwards (Which it what you pay the money for) but it's the peak pressure where it's lacking.

As your car is 'mapped', boost pressure would have almost certainly been tweaked up, the forge valves are all tuned for standard car setups.

Not trying to dis you or anything - just my interpretation of the graphs, but hey, I only talk hairdryers these days [/quote']

Stu, I value yours and everybody elses opinion when it comes to things like this.

I upgraded the standard Green spring to the next one up - Yellow.

What would you recommend?