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Author Topic: de-cat  (Read 20155 times)

Offline Tfsi_Mike

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Re: de-cat
« Reply #15 on: May 14, 2010, 08:52:19 pm »
It passed :booty:

Was that a std exhaust, i mean does the miltek tbe still have the ceramic precat???

Offline jonnyc

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Re: de-cat
« Reply #16 on: May 14, 2010, 08:54:09 pm »
Lol thats brutal Jonny!!!

A shameless way to treat a new car. :signLOL:



Naaaah..  :happy2: Listen up, im leaving my house in about 10 mins.. It should be loud enough for 'most' of town to hear it now haha..

Anyways, back on topic.. Going from a Sports cat to de-cat will help power and torque as Hurdy said.. I have found in almost all cases going de-cat reduces noise when cruising, but makes the car louder on throttle.. Usually, less of a boom too with de-cat.. More of a raspy note..

Hope that helps..
APR Stage III TT-RS - 11.37 1/4 mile - 2.82 0-60 MPH

Build thread http://www.vagoc.co.uk/vb/showthread.php?t=3128

Offline jon-tfsi

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Re: de-cat
« Reply #17 on: May 14, 2010, 09:40:40 pm »
A Decat to Std Catback would sound great IMO

Should also provide the same performance as any aftermarket TBE on a K03 motor.

The gasses cool as they travel through the system and effectively shrink, not requiring such a large diameter to travel at the same speed. The Std cat back is 2.25" internal diameter on a GTI (prob same on VRS) and should not be restrictive.

It might be worth getting your MOT done just before you have the decat installed :wink:

GOLF R Mk7

Offline Janner_Sy

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Re: de-cat
« Reply #18 on: May 15, 2010, 11:07:03 am »
what would you guys reccommend decat wise for my k03

a 2.5" piper Decat downpipe
or a 3"Blueflame decat downpipe

Offline jonnyc

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Re: de-cat
« Reply #19 on: May 15, 2010, 11:26:11 am »
what would you guys reccommend decat wise for my k03

a 2.5" piper Decat downpipe
or a 3"Blueflame decat downpipe

I think 3" downpipe.. As it has been said, when the EGT's are at there highest you need the larger diameter..
APR Stage III TT-RS - 11.37 1/4 mile - 2.82 0-60 MPH

Build thread http://www.vagoc.co.uk/vb/showthread.php?t=3128

Offline Janner_Sy

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Re: de-cat
« Reply #20 on: May 15, 2010, 11:30:38 am »
cool,  thats only £225 as well. :jumpmove:

I now need to look into a good but quiet(ish) intake.  Last time i had the full non res TBE, and ITG and the missus did nothing but complain. 

I want the same performance as before with less shouting about it.  which is always handy as in medway you cant drive a mile without seeing a cop car,

Offline Tfsi_Mike

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Re: de-cat
« Reply #21 on: May 15, 2010, 01:15:51 pm »
cool,  thats only £225 as well. :jumpmove:

I now need to look into a good but quiet(ish) intake.  Last time i had the full non res TBE, and ITG and the missus did nothing but complain. 

I want the same performance as before with less shouting about it.  which is always handy as in medway you cant drive a mile without seeing a cop car,

very true about the Chatham taxis.

Booked in 8am next Saturday for bolt in/out decat section :)

what got you back into tuning the vrs si? ;)  :P

Offline Janner_Sy

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Re: de-cat
« Reply #22 on: May 15, 2010, 01:26:58 pm »
I drove some red car with a flat spot, and then thought shouldnt be to hard to beat it :P

Offline Tfsi_Mike

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Re: de-cat
« Reply #23 on: May 17, 2010, 05:20:40 pm »
I drove some red car with a flat spot, and then thought shouldnt be to hard to beat it :P

Funny guy  :laugh: Was it very fast?

You know if the Miltek has the Ceramic precat?  Gettin De-cat done saturday morning  :party:

Offline Janner_Sy

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Re: de-cat
« Reply #24 on: May 17, 2010, 05:25:12 pm »
I drove some red car with a flat spot, and then thought shouldnt be to hard to beat it :P

Funny guy  :laugh: Was it very fast?
Not really, its definately no match or the vRS :P


You know if the Miltek has the Ceramic precat?  Gettin De-cat done saturday morning  :party:
no its just the bottom cat on the miltek. have you bought a new decat pipe or are you butchering the miltek like hurdy has done so you can do the swap at MO time

Offline Tfsi_Mike

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Re: de-cat
« Reply #25 on: May 17, 2010, 05:29:42 pm »
I drove some red car with a flat spot, and then thought shouldnt be to hard to beat it :P

Funny guy  :laugh: Was it very fast?
Not really, its definately no match or the vRS :P


You know if the Miltek has the Ceramic precat?  Gettin De-cat done saturday morning  :party:
no its just the bottom cat on the miltek. have you bought a new decat pipe or are you butchering the miltek like hurdy has done so you can do the swap at MO time

Butchering the Miltek with a flanged stainless section and flanging the Cat.

Offline Janner_Sy

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Re: de-cat
« Reply #26 on: May 17, 2010, 05:31:13 pm »
make sure you get yourself a few gaskets for when you swap over.

Offline Tfsi_Mike

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Re: de-cat
« Reply #27 on: May 17, 2010, 05:31:51 pm »
make sure you get yourself a few gaskets for when you swap over.
:happy2:

Offline Janner_Sy

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Re: de-cat
« Reply #28 on: May 17, 2010, 05:33:38 pm »
and one of those WOT boxes for some flame action in combo with the decat :jumping:

Offline Tfsi_Mike

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Re: de-cat
« Reply #29 on: May 21, 2010, 07:13:54 pm »

Decat bright and early in the morning!  Hope I feel the benefit!!  :smiley:

any last words of advice?   :smiley: