MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: GTiBlues on February 22, 2016, 07:09:52 pm
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Going from a Revised D to a G within 6 months. Then the G failing in less than 10 months.
Is HEAT the main reasons for them for failing?
As soon as I fitted my Full under-tray when I fitted my Revised D. I seem to be eating diverter valves.
My car is only running a Stage 1 Revo. So would it be worth fitting the short under-tray?
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Tough one to answer. Only thing I can contribute is that on k03 cars the dv is closer to the turbo and would in theory be subject to more heat than the dv on a k04 car.
So if you're k03, heat could indeed be playing a big part in the problem.
If the full undertray you're referring to is the special aero thing off the mk6 Bluemotion, then maybe there's a point that it wasn't designed for a car with components being subjected to mapped GTI temperatures..? But that does seem a bit of a stretch for an explanation!
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I put a full sized undertray on my ED30,
No heating issues in general. Then again, my DV was up top.
Also, my current car has shields pretty much front to back, it is better for keeping crap out in my opinion.
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I've ordered today the full engine undertray.
Parts:
-1K0825237P
-1K0825951 (x3)
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I can't remember what model it was off from. It's got the golf ball effect on it. It's a genuine part and there are slots around etc.
It's a K03 turbo.
When my DV+ arrives I'll the stick the short tray on and zip tie up the oil level sensor cable.
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My K03 2+ with Meth kills them in 18-24 months
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I'm not even lasting 12 months.
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I ran a full undertray on my GTI and never had any issues. My G DV had no tears after a year when I replaced it when it went for mapping.
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What are the benefits of running a full undertray?
How much for all the parts?
Rich
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It's started after its been remapped. I don't want to go down the route of fitting a Forge and it's regular servicing.
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What are the benefits of running a full undertray?
How much for all the parts?
Rich
Its about £35-£40 for the parts, see above.
1. I've been running one for about 50,000 with no problems with the G valve.
2. Benefits, quieter on motorway, slightly better MPG, less water spray in engine
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I noticed no increase in MPG or noise reduction. It may reduce noise outside the car when idling.
The reason I got one was increased protection under the car from debris (being on air I was low and it would scuff before i hit the subframe).
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I gather then it could be something else causing it to fail.
Only thing I've noticed with the full tray is how light the steering feels at higher speeds.
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I was just about to create a post regarding G revision diaphragm and Forge DV. I've had the latter on my car for 4 years and 70,000 miles and never had an issue. I've now booked into R-Tech in Leicestershire for a change of map for stage 2+/3 and they say they won't touch the car with a Forge DV on and I have to change the back to a revision G. I will do so as I want to see what their map offers over my custom Evolution Chips map, but I found it a little strange tbh.
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Forge DVs sound cool but can in some cases be problematic.
rtech want the absolute best hardware so using the oem g dv is the way forward.
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Thanks for replying XJay. So an OEM revised edition DV of a part that is prone to failure is better than an uprated part? I must admit I don't know to what extent they both do their jobs differently or if they even do at all. So any enlightenment would be welcome. All I know is when I got my Gti and had it modded it's boost was around 10-12psi, removal of OEM DV revealed split diaphragm, so replaced with Forge DV and boost was 18-20psi and it's been like it for 4 years and 70,000 miles. Don't get me wrong, I'm not pro Forge and I want the best from my map at R-Tech, but just a little confused.
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It's been well proven that the OEM revision G valve is the best valve for the TFSIs.
It should be treated as a yearly maintenance item. 40 quid and easily home changable.
You replaced a broken valve with a new one, so of course it would be better.
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Okay point taken. So the difference between the OEM G and Forge DV is?
One recirculates the gasses back into the turbo and the other....
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Tell a lie. I always refer to my part as a Forge DV, but it's referred to as vacuum operated record valve. Do you know the difference?
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If you look at the two they are very different, don't need me to tell you that.
Piston type valves like the rev d, gfb dv+ etc may last longer but offer no proven performance gains and plenty of proven losses.
the OEM G revision DV is the best for sealing as the diaphragm is improved on older earlier revisions.
http://forums.vwvortex.com/showthread.php?3336171
ultimately you want an r-tech map you are paying for their knowledge so i would suggest you stick to their recommendation or niki would be unhappy! :laugh:
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Of course I want the best from the map, so naturally I will obey haha! I just needed to knowledge the reasons why.
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Great link BTW!
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I think if Niki says he prefers one part over another you've kind of got to sit up and listen.
Not sure if there are many more TFSI tuners in the country with his experience.
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If you look at the two they are very different, don't need me to tell you that.
Piston type valves like the rev d, gfb dv+ etc may last longer but offer no proven performance gains and plenty of proven losses.
the OEM G revision DV is the best for sealing as the diaphragm is improved on older earlier revisions.
http://forums.vwvortex.com/showthread.php?3336171
ultimately you want an r-tech map you are paying for their knowledge so i would suggest you stick to their recommendation or niki would be unhappy! :laugh:
I'm willing to try out the GFB+ DV after reading a bit about it and watching Niki's video test fitting one of them. It seems that some units have too much paint that doesn't allow the piston to move freely in the solenoid rod. If the one I receive doesn't work properly, I'll return it.
I also have to relocate my DV to the front of the engine. LHD cars have the DV too much hidden and the useless noise pipe.
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I think if Niki says he prefers one part over another you've kind of got to sit up and listen.
Not sure if there are many more TFSI tuners in the country with his experience.
Absolutely, I'm looking forward to the map. Please understand my questioning is merely because I was quizzical and want to learn more. At the end of the day, we all want what's best for our cars right? And I'm no different, so I'm happy to succumb to someone with greater knowledge :)
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Yeah I'm with you mate - question everything!! (Not just on mk5 GTI forums..)
Lots of stuff is subjective - it's easy to say brand A is better than brand B, but for some, different parts work better for them in different circumstances.
But certain things, like the diverter valve, have to be looked at objectively as it's designed to do the same job under the same circumstances for everyone.
I trust what Niki says!
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Absolutely mate. Great points.