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Model specific boards => Golf mk4 => Topic started by: Nino on 22 September 2013, 12:51

Title: Turbo back possibilty and feedback please
Post by: Nino on 22 September 2013, 12:51: Hey guys, After speaking with GTI_James about this for ages and hearing a video of his setup I have decided I will be doing a turbo back however Im worried about the whole No cat no MOT crap and I don't want the hassle of putting a cat on every MOT.

My plan was to first get these two..... Same as James.

(http://i.ebayimg.com/t/VW-GOLF-MK4-20V-1-8T-STAINLESS-EXHAUST-DECAT-DOWN-PIPE-/00/$(KGrHqR,!jQE3NJUJBlrBOEwM7O32Q~~_12.JPG)
http://www.ebay.co.uk/itm/200627087327?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

And then...

(http://i.ebayimg.com/t/GOLF-MK4-ANNIVERSARY-180BHP-EXHAUST-MILLTEK-CAT-BACK-NON-RES-4-GT100-TAIL-/00/s/ODExWDU5OA==/$(KGrHqJHJDgFCIiQTz7,BQnT0ZeDJw~~60_12.JPG)
http://www.ebay.co.uk/itm/230830744910?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

But now I want to get a sports cat, I have no idea abot these things I.E what is a 200 CPI & 100 CPI cat? :undecided:
I.E...
http://www.ebay.co.uk/itm/VW-GOLF-BORA-1-8T-20v-STAINLESS-STEEL-200-CPI-SPORTS-CAT-PIPE-EXHAUST-DOWNPIPE-/230863358957?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Model%3AGolf|Plat_Gen%3AMK+IV|Cars+Type%3A1.8+T&hash=item35c0874bed

VS

http://www.ebay.co.uk/itm/SEAT-LEON-1-8T-20v-STAINLESS-STEEL-100-CPI-SPORTS-CAT-PIPE-EXHAUST-DOWNPIPE-/230857726895?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Model%3AGolf|Plat_Gen%3AMK+IV|Cars+Type%3A1.8+T&hash=item35c0315baf

I have also noticed that the Downpipes with the cats are 2.5" where as the decat is 3" i need some expert adivse here guys :nerd:

Should I just get the 1st downpipe and then this?
(http://i.ebayimg.com/t/2-5-EXHAUST-STAINLESS-STEEL-200-CELL-HIGH-FLOW-SPORTS-CAT-CATALYTIC-CONVETER-/00/s/MTQ1M1gxNjAw/z/kDUAAMXQrvpREUSl/$(KGrHqRHJEsFEP1QVNTNBREUSkwHkg~~60_12.JPG)
http://www.ebay.co.uk/itm/2-5-EXHAUST-STAINLESS-STEEL-200-CELL-HIGH-FLOW-SPORTS-CAT-CATALYTIC-CONVETER-/330903127722?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item4d0b5d06aa

But then again would it fit on the 3" downpipe? :huh:
Title: Re: Turbo back possibilty and feedback please
Post by: rfn_hodgson on 22 September 2013, 15:07: Sorry to jack your thread but what does it mean by 200cpi and 100cpi.... Ie what's the difference??
Title: Re: Turbo back possibilty and feedback please
Post by: GTi_James on 22 September 2013, 15:31: if you are worried about it bud what i'd suggest doing is only getting the cat back for now with a reducer so that it will slip straight onto your current stock dp and cat

then in 2 months time you would of saved enough for the miltek sports cat and that way your guaranteed quality?
Title: Re: Turbo back possibilty and feedback please
Post by: beppe2672 on 22 September 2013, 15:45: CPI= cells per inch, higher the number the more cells there are in the cat. So a 200 cell would give you better emissions, a 100 cell cat would be less restrictive (bigger gaps between the catalyst medium)
Title: Re: Turbo back possibilty and feedback please
Post by: Wazzzer on 22 September 2013, 15:47: CPI means cells per square inch. So the lower the number the less surface area you have for the gasses to flow past. In effect this means the more CPI you have the cleaner the emissions but it also means the gasses will be more restricted

beppe2672 damn you, I might abuse my powers and delete your response :grin:
Title: Re: Turbo back possibilty and feedback please
Post by: beppe2672 on 22 September 2013, 15:53: Lol, beat you to it!
Title: Re: Turbo back possibilty and feedback please
Post by: Nino on 22 September 2013, 18:12: Good point james, all i want to know is if i buy the 3" how would i get the sports cat to fit?
Title: Re: Turbo back possibilty and feedback please
Post by: Wazzzer on 22 September 2013, 19:22: 100CPI won't pass MOT
Title: Re: Turbo back possibilty and feedback please
Post by: mar_k on 22 September 2013, 19:26: Never had an issue with not having a cat on the car, Loads of friendly MOT places.
Title: Re: Turbo back possibilty and feedback please
Post by: Rhyso on 22 September 2013, 20:59: Get yourself to ProSpeed in Cardiff

Charlie will advise and make a system to suit you. Quality of work is superb :cool:
Title: Re: Turbo back possibilty and feedback please
Post by: Nino on 22 September 2013, 21:43: Quote from: Rhyso on 22 September 2013, 20:59
Get yourself to ProSpeed in Cardiff

Charlie will advise and make a system to suit you. Quality of work is superb :cool:

I dont agree i had my mk3 done an it went bk 3 times for brakes in the weld. And im not the only one thats had problems hes also quoted me £900
Title: Re: Turbo back possibilty and feedback please
Post by: Rhyso on 22 September 2013, 21:48: Quote from: Nino on 22 September 2013, 21:43
Quote from: Rhyso on 22 September 2013, 20:59
Get yourself to ProSpeed in Cardiff

Charlie will advise and make a system to suit you. Quality of work is superb :cool:

I dont agree i had my mk3 done an it went bk 3 times for brakes in the weld. And im not the only one thats had problems hes also quoted me £900

:undecided: oh well. I can only advise based on my experience. His system was cheaper and of superior quality to the equivalent Milltek
Title: Re: Turbo back possibilty and feedback please
Post by: Nino on 23 September 2013, 05:58: I must say once he got it sorted I was very happy but after my friend had his peougot Gti done there and messed that up too that was it for me.