All Things Mk5 > Performance Modifications
Ebay Sports Cat 100cell.... Pics & Fitted
RedRobin:
--- Quote from: JMP on September 13, 2012, 06:28:13 am ---
--- Quote from: RedRobin on September 12, 2012, 10:07:28 am ---it worries me that some people...
--- End quote ---
Maybe you shouldn't worry so much what other people do? This DP seems to work perfectly, so it really doesn't make a big difference which catback you mate to it. Mainly it will just change the sound characters of the car. Its not like your changing the way engine works.
Its not a bad thing that people want to save money and not go with the unbelievably expensive exhaust options. IMHO they just dont represent a good value for money. So If someone wants to make his/her own combo, its perfectly fine and is certainly more rewarding for a person with a modification bug.
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....I can respect what you are saying but I am only expressing concern for the sake of others reading this thread and following the examples. There's more to performance exhaust systems than just the sound. You say: "This DP seems to work perfectly" - The term "seems" does not fill someone with confidence. Perhaps you don't know that a very expensive and very important component in a performance exhaust system is the catalyst which uses precious metals.
Of course if someone wants to make their own combo it's entirely up to them and makes no difference to me, but do they really know better than the specialists who have spent years of time and investment in producing high performance exhaust systems fit for purpose?
Each to their own of course but I'm just sharing my opinion :smiley:
Powervalve Nige:
The problem you need to be aware of is the braided flex liner.
As the gasses super heat the flex braid expands dramatically and chokes the flow of the system. Unfortunately it has no memory and stays in its expanded position, the net result will be a dramatic loss of performance.
The only reliable product suitable for this application is the stainless steel 'i - LOK' flex.
So if you are going down the path of upgrading your performance you need to be aware of this. In other words a loss of power may take some time for an un educated (on this matter) technician to diagnose, especially as outwardly the flex will appear structurally sound.
That is of course if it doesn't snap first - at just over 100mm in length it is no where near long enough to absorb the transverse torque of the 2.0 TFSi especially when tuned - it needs to be at least 200mm to prevent this (Just look at the OEM DP for evidence on this and feel how flexible it by comparison.
Sorry to be the bearer of disappointing news but hey knowledge ahead of the event can save money in the long run.
Cheers
Nige
RedRobin:
--- Quote from: nige bcs on September 13, 2012, 09:25:12 am ---
The problem you need to be aware of is the braided flex liner.
As the gasses super heat the flex braid expands dramatically and chokes the flow of the system. Unfortunately it has no memory and stays in its expanded position, the net result will be a dramatic loss of performance.
The only reliable product suitable for this application is the stainless steel 'i - LOK' flex.
So if you are going down the path of upgrading your performance you need to be aware of this. In other words a loss of power may take some time for an un educated (on this matter) technician to diagnose, especially as outwardly the flex will appear structurally sound.
That is of course if it doesn't snap first - at just over 100mm in length it is no where near long enough to absorb the transverse torque of the 2.0 TFSi especially when tuned - it needs to be at least 200mm to prevent this (Just look at the OEM DP for evidence on this and feel how flexible it by comparison.
Sorry to be the bearer of disappointing news but hey knowledge ahead of the event can save money in the long run.
Cheers
Nige
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....This is exactly the sort of expert information which people should be taking notice of and why I would not ignorantly attempt a Heath Robinson experimental approach whether I have a modding bug or not. Cheap eBay products are generally simply not to be trusted in my opinion.
Pay peanuts and you get monkeys.
JMP:
--- Quote from: RedRobin on September 13, 2012, 09:11:01 am ---....I can respect what you are saying but I am only expressing concern for the sake of others reading this thread and following the examples. There's more to performance exhaust systems than just the sound. You say: "This DP seems to work perfectly" - The term "seems" does not fill someone with confidence. Perhaps you don't know that a very expensive and very important component in a performance exhaust system is the catalyst which uses precious metals.
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Im aware of the function of catalysator, thank you very much. I used the word "seems" because I have only my own limited user experiences & logs about this and Im not trying to sell anyone anything or provide you with confidence. You might have your own reasons to buy an exhaust system and so did I. So it might fail or not, I didnt plan for it last me 10 years anyway because I will most likely change my car in couple of years. Experiences about ebay decat pipes lasting well (even the flex joint) insprired my purchase. I do my own work so I can swap it out and change the flex section if it breaks, but as I have stated I have mounts so maybe it doesn't. I have heard stories about Milltek joints breaking, so that doesnt inspire confidence either. The flex joints are quite short with APR & Milltek also.
I dont want to fight about this, I know people tend to buy the products by brand names but be as precious metals as you keep saying, most of the downpipes are still grossly overpriced. This example worked for my application, if your not happy with it then you can just cry about it :P
RedRobin:
--- Quote from: JMP on September 13, 2012, 10:33:55 am ---
I dont want to fight about this, I know people tend to buy the products by brand names but be as precious metals as you keep saying, most of the downpipes are still grossly overpriced. This example worked for my application, if your not happy with it then you can just cry about it :P
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....No problem, mate :happy2:
As I said before, I'm just expressing and sharing my opinions. I'm not unhappy about what other folks decide to buy - Folks can and will make up their own minds. As a car enthusiast community we merely share our opinions and mine happens to be different from yours on the subject of exhaust systems.
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