MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: Simmo on January 26, 2014, 11:43:48 am
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Right, I've read hundreds of threads on "which DV is best to replace when going to stage 1 or above" and they seem to be split down the line. In fact the tuners seem to be split down the line as well. I've also read R Tech have trialled modifying an OEM DV with different springs.
I'm going for stage 2 (standard gti not eddy) and really not sure which way to go.
D appears to be the latest with piston but leaks boost and G seems to be the last version before TSI engines which are diaphragm but hold boost. Both don't suffer from the earlier boost leaks. Or do they? In fact does the D leak and is this all rubbish!?
Can anyone advise, is there a specific DV out of D or G to go for or does it really not matter?
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G.
Now delete this thread IMMEDIATELY before peeps start committing suicide! :happy2:
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G.
Now delete this thread IMMEDIATELY before peeps start committing suicide! :happy2:
^^^^as above, delete now - too too many times this had been done. G is best Fact!
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:smiley: thought that might be the case! Can't delete thread though doh!
Guess il have to sit back and watch the flames!
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G
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Mine is a K03 and factory standard original. Take it if mine needs replacing I should go g as well. Or is g better for modded.
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I replaced my B with a D and ran it for 6 months, now been running a G for a few months and it's so much better, more boooooost, better tsssshhhh noises, MPG gone up a bit too.
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I love debates..... Try the F :-)
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Lol pulling ur pissers sorry..
G all the way. The springs are used for boost transition / reaction between manifold pressure and vacuume. Stronger the spring with higher boost the sharper the movements. The electromagnet side of the DV body only "opens" up the piston it cannot add force to clamp the piston shut... Sounds strange?? The DVs use the basic physics of equal pressure on both sides of the pistion, in the centre of the pistons D and the G the is a hole which the boost pressure flows into resulting in the pistion being pushed hard closed shut to hold the boost back. The G is fully air tight from day one and has a nice rubber ring to seal on to the alloy surface. The D uses a plastic sealing on the piston body this is not an air tight seal even when brand new that seal leaks in most cases, if not then afters a few weeks the plastic ring becomes slack and leaks.
Treat the G DVs as a consumable item change every year and the rubber quality will degrade over time with the constant expansion, pressure heat, movement and oil.. For £35-40 it's worth doing every service along with the hpfp cam follower
Hope this make sense, lol Sunday pm trying to watch superman 3, kids running a riot around the house and trying to type on a iPhone with dog laying on my arm...
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Hi nick
What's your view on the forge dv. I've had mine fitted for 3 years with no issues thus far.
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G all the way. The springs are used for boost transition / reaction between manifold pressure and vacuume. Stronger the spring with higher boost the sharper the movements. The electromagnet side of the DV body only "opens" up the piston it cannot add force to clamp the piston shut... Sounds strange?? The DVs use the basic physics of equal pressure on both sides of the pistion, in the centre of the pistons D and the G the is a hole which the boost pressure flows into resulting in the pistion being pushed hard closed shut to hold the boost back. The G is fully air tight from day one and has a nice rubber ring to seal on to the alloy surface. The D uses a plastic sealing on the piston body this is not an air tight seal even when brand new that seal leaks in most cases, if not then afters a few weeks the plastic ring becomes slack and leaks.
Treat the G DVs as a consumable item change every year and the rubber quality will degrade over time with the constant expansion, pressure heat, movement and oil.. For £35-40 it's worth doing every service along with the hpfp cam follower
Can someone PLEASE make this a sticky! :happy2:
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No issue you know of.... ;-). I have yet to come across one which has not had issues. On average 18-23bhp losses back to back vs the G. The car drives ok with it fitted but back to back logging and dyno runs show its causing issue with peak flow /power. Find a local dyno and run back to back with a G and see what happens.
There was a dude (gaz i think) on here with White S3 stage2+ map from awesome GTi, he had a Forge DV fitted and was convinced it felt slower, he came to me for a power run and logging session which he ended up leaving with 20hp more just by running a stock dv setup.
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Thanks nick
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Great to see Niki up giving great info and advice to this forum :)
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Wish I had more time help out and join in like the old golfgtiforum days, but 4 kids take up all my spare time now
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Maybe a daft question, but can I fit a 'G' version to my mk6 R? The D gives the occasional 'shudder' as it closes after pulling away, and it sounds crap through the EVOMS compared to the 'G' on my GTI!
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Maybe a daft question, but can I fit a 'G' version to my mk6 R?
Yes :happy2:
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muchas gracias :happy2:
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I have another batch of 25% stiffer springs being made up. I might get a huge batch made up and get Ben to do them mail order to help people out.
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I have another batch of 25% stiffer springs being made up. I might get a huge batch made up and get Ben to do them mail order to help people out.
Would like!
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I have another batch of 25% stiffer springs being made up. I might get a huge batch made up and get Ben to do them mail order to help people out.
count me in
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I have another batch of 25% stiffer springs being made up. I might get a huge batch made up and get Ben to do them mail order to help people out.
:popcornsoda:
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Nick do you have any views or experience with the GFB dv+?
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Nick do you have any views or experience with the GFB dv+?
ITS TERRIBLE I HATE THEM. I FITTED IT TO MY CAR AND AFTER 8 MONTHS IT WENT WRONG SO I PUT A REVO ONE IN AND IT WORKED.
:signLOL: :signLOL:
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Nick do you have any views or experience with the GFB dv+?
ITS TERRIBLE I HATE THEM. I FITTED IT TO MY CAR AND AFTER 8 MONTHS IT WENT WRONG SO I PUT A REVO ONE IN AND IT WORKED.
:signLOL: :signLOL:
Oooooh touchy
I was proved right in the end though!!!
Dodgy dealings and all that. Ha ha
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Nick do you have any views or experience with the GFB dv+?
ITS TERRIBLE I HATE THEM. I FITTED IT TO MY CAR AND AFTER 8 MONTHS IT WENT WRONG SO I PUT A REVO ONE IN AND IT WORKED.
:signLOL: :signLOL:
REVO DV :confused: where do you get these REVO ones from , never knew REVO did DV's. any pics?
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Nick do you have any views or experience with the GFB dv+?
ITS TERRIBLE I HATE THEM. I FITTED IT TO MY CAR AND AFTER 8 MONTHS IT WENT WRONG SO I PUT A REVO ONE IN AND IT WORKED.
:signLOL: :signLOL:
REVO DV :confused: where do you get these REVO ones from , never knew REVO did DV's. any pics?
They don't exist mate.
It was just his attempt at humour towards me.
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Nick do you have any views or experience with the GFB dv+?
ITS TERRIBLE I HATE THEM. I FITTED IT TO MY CAR AND AFTER 8 MONTHS IT WENT WRONG SO I PUT A REVO ONE IN AND IT WORKED.
:signLOL: :signLOL:
i see :happy2:
REVO DV :confused: where do you get these REVO ones from , never knew REVO did DV's. any pics?
They don't exist mate.
It was just his attempt at humour towards me.
I see
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DV+ leaks just the same as a D.
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DV+ leaks just the same as a D.
Thank you
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Do those with BIG turbos need to run a double G? :smiley:
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(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fstream1.gifsoup.com%2Fview7%2F2623190%2Fmagic-roundabout-o.gif&hash=0d795eec1f091b966699e3b83f8f819049fb9f3e)
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(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi1049.photobucket.com%2Falbums%2Fs399%2Fmcaborn%2F5147f3d9583b94e0b0d6218524a743b4_zps68ada9b6.jpg&hash=ceebbc9a56d8196de8baf790128026645616772d)
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A few questions here, which DV has the yellow ring for me to tell which I have?
Also, where is the best place to buy and is there a tutorial on replacing?
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get the g revision from vw main dealer
fitting wont cost alot take half hour at most with ramp
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get the g revision from vw main dealer
fitting wont cost alot take half hour at most with ramp
Brilliant - friend works for VW and my dads a mechanic with a ramp haha
I want to do it myself though so I'll use his ramp and have a play myself :)
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good idea there about 35 to 40 quid at dealers it will be easy to do yourself if u have ramp n tools
vas u on dw aswell
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good idea there about 35 to 40 quid at dealers it will be easy to do yourself if u have ramp n tools
vas u on dw aswell
how weird I just replied to you on DW in the newbies section hahaha
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lol funny
have u decided to map it at rtec !?
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hey
just seen reply im in bush hill park and you ?
i think ive seen your car before not many that colour round here anyway!
u prob seen my black gti before running around at night mine has plasti dip gold alloys lol
cant miss it
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hey
just seen reply im in bush hill park and you ?
i think ive seen your car before not many that colour round here anyway!
u prob seen my black gti before running around at night mine has plasti dip gold alloys lol
cant miss it
I saw a black one a few days ago, what year is yours? 54 or something?
I'm near Green Dragon pub if you know it :)
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yeah green dragon just down rd from me! mines 05 plate gold alloys lol
if u ever wanna check r tec map no probs take u for spin before u get mapped!!
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yeah green dragon just down rd from me! mines 05 plate gold alloys lol
if u ever wanna check r tec map no probs take u for spin before u get mapped!!
Ha that's crazy you're so close! Definitely would be good to meet someone else with a gti! Got a DSLR and a gopro if you wanted to have a little shoot? Next weekends a bit hectic but maybe the sunday after or something...
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i know how crazy like 2 mins away good to meet up one day and a shoot sounds good would like to get some decent shots of my car ! esp with gold alloys now lol and good to meet a fellow GTI nut , and u can see my car n the mods i have done!
be good to keep in touch should be ok sunday week!
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What's a DV? Is it something else I can just write out a cheque for the newest, best thing?
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What's a DV? Is it something else I can just write out a cheque for the newest, best thing?
This should help explain http://www.mk5golfgti.co.uk/forum/index.php/topic,44709.0.html (http://www.mk5golfgti.co.uk/forum/index.php/topic,44709.0.html)
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K04 - G all day
K03 - D possibly DV+ , diaphragms can be tested being so close to the Turbo... been through 3 diaphragm DV's in 40k on K03
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D and DVplus leak boost
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D and DVplus leak boost
DV+ leak boost on K03?
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they leak boost on k03 and k04
not sure if a stadard non mapped car would leak boost but rev g doesnt so..................
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Love to see proof of this on K03.. all I know is the Rev G split after a while on a sustained tuned K03; useless for longevity
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G = More boost. :happy2:
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I assume my 05 has the original DV. I have a rev D to put in it. Are you all saying it is a waste of time?
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R-tech why do you not like the forge unit?
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R-tech why do you not like the forge unit?
Another DV product that isn't needed and doesn't always function and seal correctly.
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you think i should change mine on my gtx setup? i was thinking of changing to a forge supersize or tial recirc
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Love to see proof of this on K03.. all I know is the Rev G split after a while on a sustained tuned K03; useless for longevity
It's a £40 that can be changed on a jack in about 20 minutes.. I view mine as a part I just replace on a yearly basis with an annual service.
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mine made 361bhp with a Rev D, so wonder whether it could be stronger still with a G :surprised:
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It's inconvenient, I want to be able to rely on a part, not have to keep changing them (done 3 now)
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Arse. I just fitted a Rev D after reading some older arguments on here :grin:
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I have both a G and a DV+ and I have done some logging with both, the the DV+ seems to meet requested boost ever so slightly earlier than the G I'm only talking 250-300rpm. I've got the graph from the DV+ here and I can get the G one when I get on my laptop at home:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi810.photobucket.com%2Falbums%2Fzz21%2FH17YD_L%2FMobile%2520Uploads%2FDV_zpsc484f0f1.jpg&hash=4a3683a085ee91b46c215dc69fde50c0b7273506) (http://s810.photobucket.com/user/H17YD_L/media/Mobile%20Uploads/DV_zpsc484f0f1.jpg.html)
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Its a bit like the HPFP debate.
If you want to get the maximum with no/little boost leak and dont mind having to change a £40.00 part every 20,000 miles go for the G.
If you want a part that wont fail and wont need changing, but will potentially compromise performace somewhat go for the D.
I suppose the big question to ask Nick and Alex is - "How much extra boost (expressed as a %) does the typical D valve lose aginst the G? How much power/torque is typically lost in the same b2b runs"
If the answer is 2-5 bhp and 5-8lb ft then you might take the view that should stick with a D. If you are losing 20lb ft and 10bhp then I think you have to say, may as well keep chaning the G when I change cam follower because if you are going to great lengths to get the most out of your car and the best possible parts on it you dont want to compromise it by having a poorly performing DV losing you a lot of performance. :popcornsoda:
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If anyone was interested in the DV+ vs REV G logs I did here they are:
REV G:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi810.photobucket.com%2Falbums%2Fzz21%2FH17YD_L%2FREVGtest_zps657369b3.jpg&hash=8531f3ba60af5c8fe58c1fef4be40616220a5c2c) (http://s810.photobucket.com/user/H17YD_L/media/REVGtest_zps657369b3.jpg.html)
DV+
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi810.photobucket.com%2Falbums%2Fzz21%2FH17YD_L%2FDVtest_zps4adc0bb8.jpg&hash=e9e00b2f6ad8892ccf4ad1e7cd8878089dd6314b) (http://s810.photobucket.com/user/H17YD_L/media/DVtest_zps4adc0bb8.jpg.html)