MK5 Golf GTI

All Things Mk5 => Modifications & Technical Area => Performance Modifications => Topic started by: Homer on April 02, 2011, 08:15:05 pm

Title: is it wise to get a new intake but not upgrade the exhaust?
Post by: Homer on April 02, 2011, 08:15:05 pm
For a full exhaust you are talking a lot of money which is not really affordable the now have only bought the car last month. I do want to upgrade the intake though and was wondering if there is any point in doing so if I have the standard exhaust- ie will it make a difference? Or should I do both together? Thanks
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: edd666999 on April 02, 2011, 08:16:56 pm
For a full exhaust you are talking a lot of money which is not really affordable the now have only bought the car last month. I do want to upgrade the intake though and was wondering if there is any point in doing so if I have the standard exhaust- ie will it make a difference? Or should I do both together? Thanks

just buy a down pipe for the exhaust not the full system. that will make biggest difference.

Or just get a stage 1 remap, best bang for buck.
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: 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
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: johnhol78 on April 02, 2011, 08:33:36 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

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?
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: stealthwolf on April 02, 2011, 08:42:45 pm
I think you need a reducer to mate it to the stock zorst.
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: johnhol78 on April 02, 2011, 09:18:18 pm
I think you need a reducer to mate it to the stock zorst.

French, german, spanish..........which one was that  :wink:
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: 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
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: Janner_Sy on April 03, 2011, 12:44:01 am
 
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?

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.

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

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.
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: martziniuk on April 03, 2011, 08:54:59 am
42DD make a spacer for the O2 sensor which will put out the exhaust cel.
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: alexperkins on April 03, 2011, 10:26:25 am
http://store.42draftdesigns.com/O2-Sensor-Spacer_p_306.html (http://store.42draftdesigns.com/O2-Sensor-Spacer_p_306.html)

I have no issues with mine either and its a TBE milltek
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: Janner_Sy on April 03, 2011, 10:38:53 am
i had errors flash up with my bluefin until i went stage 2, same with the shark performance map.  Maybe its pot luck, who knows
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: TrickGTI on April 03, 2011, 11:25:03 am
I would say unless you can re-map the car after the exhaust then don't fit it untill you can afford. I left the downpipe untill last just before I went stage 2+ and I'm happy I did leave it till last because I experienced some big flat spots in the rev range and I couldn't have lived with it for long. Just a thought.
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: Homer on April 03, 2011, 10:58:05 pm
so are you guys saying that even a full militek after a stage 1 would cause problems with the sensors?? My local revo dealer said that a new exhaust and induction kit would make full use of a stage 1....

Also in response to my original question so it would be fine to put in a new induction kit without upgrading the exhaust?
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: Janner_Sy on April 03, 2011, 11:04:15 pm
the induction kit is IMO the better option to do first before you get an exhaust and stage 2 map.

the cat back part of the exhaust wont give you any engine lights as it doesnt change the flow rate or lambda values etc as its not a performance modification
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: TrickGTI on April 04, 2011, 10:11:59 pm
You would be better off fitting what mods you want and then getting the map later as with revo the tuner would be able to change settings to optimise your mods. It would proberly be fine doing the map first but to be a 100 % sure it was running sweet then the map last Imo.
Title: Re: is it wise to get a new intake but not upgrade the exhaust?
Post by: Hurdy on April 05, 2011, 10:49:24 am
If you cannot afford a full zorst, have a decat insert fitted to the stock exhaust. The cat is the single most restricting element in there :happy2: