EM TuningSky Insurance
Results 1 to 8 of 8

Thread: Decat?

  1. #1
    1st Gear

    Status
    Offline
    Join Date
    Jan 2011
    Posts
    171

    Decat?

    Hi!

    Am i going to see any improvement in lag if I take my cat out, gut it, and fit it back in? This is prior to the stage 1 remap.

    Also will it pass MOT with no cat?

    Also, when starting up from cold is it usual to get a ton of white smoke (i think its just condensation, it doesnt smell of oil...) ?

    Many thanks!

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    RobinA3's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Aug 2005
    Location
    Cheshire
    Posts
    1,758
    Quote Originally Posted by thesmileyone View Post
    Hi!

    Am i going to see any improvement in lag if I take my cat out, gut it, and fit it back in? This is prior to the stage 1 remap.
    Yes

    Also will it pass MOT with no cat?
    NO!


    Also, when starting up from cold is it usual to get a ton of white smoke (i think its just condensation, it doesnt smell of oil...) ?
    Yes.

  4. #3
    bez101's Avatar
    Yorkshire & Humber Rep.

    Status
    Offline
    Join Date
    Jul 2008
    Posts
    7,985
    dont gut it
    it will sound crap get a decat

  5. #4
    jungleman's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Mar 2010
    Location
    SW London
    Posts
    2,051
    Quote Originally Posted by thesmileyone View Post
    Hi!

    Am i going to see any improvement in lag if I take my cat out, gut it, and fit it back in? This is prior to the stage 1 remap.

    Also will it pass MOT with no cat?

    Also, when starting up from cold is it usual to get a ton of white smoke (i think its just condensation, it doesnt smell of oil...) ?

    Many thanks!
    ok here are a few things, gutting is bad as you will still lag as there are a lot of restrictions on the down pipe, so you really need a properly designed system to funnel the exhaust gases out as the stripped cat section will prob cause a load of turbulence and grief, also doing this without a stage 2 map will result in you always having the engine management light on.

    when it comes to the MOT on visual inspection, with a gutted cat section they will in theory pass it, but without mapping to correct the EML and fuelling it may very well fail on emissions

    you won't get any white smoke, but you will get a wiff of petrol for the first couple of minutes after a cold start

    hope that helps
    Factory: Phantom Black S3, BOSE, RNS-E, Adaptive Lights, Interior Lights, Auto Lights

    Added: Evolve Stage 2 Map, Evoms CAI, Milltek TBE Non-res With Special Tips Now At 360bhp & 385lb/ft, VWR 4 pots, H&R Springs, H&R Spacers, Sachs Clutch, '09 Rear Clusters, Pressed Metal Plates, TT Air Vents

    To Do list: Now that would be telling




    PM me for Weitec & KW coilovers

  6. #5
    bez101's Avatar
    Yorkshire & Humber Rep.

    Status
    Offline
    Join Date
    Jul 2008
    Posts
    7,985
    you can get a spacer to stop the light comeing on
    depending on who you use for the map some write it out some dont on stage 1

  7. #6
    jungleman's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Mar 2010
    Location
    SW London
    Posts
    2,051
    I've heard of the spacer, not seen one before, always worth a try
    true, though you would have to specify the lambda defeat to the tuner though as that not a standard stage 1 spec
    what car you mapping anyway?
    Factory: Phantom Black S3, BOSE, RNS-E, Adaptive Lights, Interior Lights, Auto Lights

    Added: Evolve Stage 2 Map, Evoms CAI, Milltek TBE Non-res With Special Tips Now At 360bhp & 385lb/ft, VWR 4 pots, H&R Springs, H&R Spacers, Sachs Clutch, '09 Rear Clusters, Pressed Metal Plates, TT Air Vents

    To Do list: Now that would be telling




    PM me for Weitec & KW coilovers

  8. #7
    1st Gear

    Status
    Offline
    Join Date
    Jan 2011
    Posts
    171
    tdi 140 dsg

    Is the miltek large bore downpipe a decat?
    2008 A3 1.8t FSI Sportback S-Line - Avus Silver - Full spec.

  9. #8
    HIGGINS's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Mar 2010
    Posts
    520
    Miltek downpipe £180

    Get a remap to support it


    Selling MY11 rear lights, message me for a price

 

 

Similar Threads

  1. decat help please!!
    By frank s3 in forum A3/S3 Forum (8L Chassis)
    Replies: 2
    Last Post: 2nd March 2011, 13:45
  2. Anyone want a decat?
    By B5NUT in forum A4/S4 forum(B5 Chassis)
    Replies: 6
    Last Post: 1st June 2010, 13:11
  3. S3 decat
    By vetch in forum A3/S3 Forum (8L Chassis)
    Replies: 6
    Last Post: 13th April 2009, 12:39
  4. 1.8T Decat.
    By RyanGolfGTTDi in forum A3/S3 Forum (8L Chassis)
    Replies: 3
    Last Post: 5th March 2009, 22:05
  5. Decat
    By Timmc in forum A3/S3 Forum (8L Chassis)
    Replies: 0
    Last Post: 16th June 2008, 14:56

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO