All Things Mk5 > Performance Modifications

3" downpipe with stage 1 problems?

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keano:
Ooo gosh. That is big! (that's what she said)   :grin:

I feel abit better about it now then.  :happy2:

Cheers Alex!

alexperkins:
 :happy2: No worries

It certainly makes it alot louder. Stage 2 on a non res milltek TBE is quite a unique sound thats for sure  :grin:

keano:
What would your views be on a  3" downpipe and center section. But leaving the back section on.

It'd work out hundreds and hundreds of pounds cheaper for me, but I believe i'd still have the same power benifits?  :confused:

alexperkins:
Personally, if you are going to do it, do it properly

The rear silencer is slightly restrictive, plus to have a 3" downpipe and center youd need a special adapter to reduce it down to 2.5/2.75 (i cant remember which it is atm lol), and as the factory silencer has the rear silencer and center silencer as one piece, youd have to cut the silencer out and join it up.

The main bottleneck is the factory downpipe as its smaller and has a precat which impedes exhaust gas flow, so yes there will be big benefits just from that.

keano:
This is something I found the other day which put the ideas into my head  :chicken:


--- Quote from: Janner_Sy on April 02, 2011, 08:20:40 pm ---an intake is fine on stage 1. If you fit the exhaust you will need to get a stage 2 map

Ed666999 is correct that if you want performance you only need the downpipe.  All you get with the cat back part of the exhaust is more noise

--- End quote ---



--- Quote from: Janner_Sy on April 03, 2011, 12:44:01 am ---
--- Quote from: johnhol78 on April 02, 2011, 08:33:36 pm ---Just been on the milltek website and it says down pipe must be fitted with Milltek cat back....??

What downpipes can be fitted with the standard exhaust?

--- End quote ---

thast rubbish.  Purely to make you buy the full system  from them.  All you need is a reducer from 2.75" to 2.5"(for the GTI 200ps) and 3" to 2.5" (k04 TFSI) is all that is required to mate it to your standard system.  My Pipewerx downpipe had the reducer built in and went from 3" to 2.5".  Sounded great as well.


--- Quote from: Homer on April 03, 2011, 12:28:45 am ---Janner- why would I need to go to stage 2 to fit a new exhaust? I have known people to fit a new exhaust without even having a remap. Do you mean its only worthwhile if I was to get a remap stage 2? Thanks

--- End quote ---

When you fit the downpipe, it removes the pre-cat and fits a free'er flowing 2'nd cat.  This means that the lambda sensor readings on the exhaust will be outside the normal range and more often than not you will end up with an engine management light flashing up.  This doesnt necessarily mean you need a stage 2 map, as a stage 1 car can have those sensors mapped out with no issues, but if your sticking on the downpipe you may as well go stage 2 IMO.

Quite alot of guys on here have run the Miltek with a reducer with zero issues, same with blueflame and pipewerx.

--- End quote ---

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