JMB RetrofitsEM Tuning
Results 1 to 24 of 24
Like Tree2Likes
  • 1 Post By BenJee_S3
  • 1 Post By Tim_Attard

Thread: Decat?

  1. #1
    Reverse Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    Scotland
    Posts
    18

    Decat?

    Having a little ponder on what mods i can do to my 1.8t 2001? one of the thoughts i had was a decat? love the sound of decat cars so can anyone tell me the ins and outs of fitting/lambda? Also, its a standard backbox i have? will this affect it at all? Thanks!

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    James TQ's Avatar
    3rd Gear

    Status
    Offline
    Join Date
    Apr 2012
    Location
    Essex
    Posts
    548
    i have a decat and standard back box, little bit more noise nothing major, had to replace the lambda but it was on the was out anyway so it will be ok

  4. #3
    Reverse Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    Scotland
    Posts
    18
    SO just sticking it on should be sound? possible lambda change though? does it backfire at all? and whats the noise like? like.... loud on acceleration and quiet on cruising?

  5. #4
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2012
    Location
    Kent
    Posts
    459

    My Social Networking

    Add Tim_Attard on Facebook
    get it done, get one of ebay for £90 comes with downpipe thats pretty much what everyone here is running and sounds awsome for me around 6k revs proper pops

    http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/187166-tims-max-power-a3.html


    Quote Originally Posted by 16Klappe View Post
    Don't listen to him Tim, You're my hero, I'm proud of you.

  6. #5
    BenJee_S3's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Mar 2013
    Location
    Peterborough/Spalding
    Posts
    138

    My Social Networking

    Follow BenJee_S3 On Twitter Add BenJee_S3 on Facebook Visit BenJee_S3's Youtube Channel Visit BenJee_S3's Instagram Channel
    I may be wrong but I've heard a decat on an S3 is pretty much pointless performance wise? The twin cat setup is so well made, it isn't restrictive enough to make a decat beneficial. That twinned with the hassle of putting the cat back on for mot time is what's deterred me from buying one. So unless you want it purely for the sound, not much point!

    Feel free to correct me if I'm wrong, this is just what I've learned from researching it for myself!
    Tim_Attard likes this.

  7. #6
    BenJee_S3's Avatar
    1st Gear

    Status
    Offline
    Join Date
    Mar 2013
    Location
    Peterborough/Spalding
    Posts
    138

    My Social Networking

    Follow BenJee_S3 On Twitter Add BenJee_S3 on Facebook Visit BenJee_S3's Youtube Channel Visit BenJee_S3's Instagram Channel
    Just realised you didn't specify for an S3 so if its the A3 I'm not sure if the exhaust set up is the same

  8. #7
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2012
    Location
    Kent
    Posts
    459

    My Social Networking

    Add Tim_Attard on Facebook
    ^^ what he said sorry was assuming you had an a3 in which case do it, s3 dont

    http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/187166-tims-max-power-a3.html


    Quote Originally Posted by 16Klappe View Post
    Don't listen to him Tim, You're my hero, I'm proud of you.

  9. #8
    Reverse Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    Scotland
    Posts
    18
    yeah guys its an A3! shouldve said! it is pretty much for purely noise! Thanks!!

  10. #9
    Reverse Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    Scotland
    Posts
    18
    Forgot to ask! is theyre a specific type to get that will just pop straight on? dont want any sort of lambda issues coming up? and i'll just be getting the garage to fit it so does the lambda become affected at all?

  11. #10
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2012
    Location
    Kent
    Posts
    459

    My Social Networking

    Add Tim_Attard on Facebook
    AUDI A3 S3 1.8T 3" STAINLESS STEEL DOWNPIPE DECAT | eBay

    this is the one you want, will help with the flow your see how much when u see the standard one, its incredably easy to do yourself on some axel stand if you fancy it
    m19lte likes this.

    http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/187166-tims-max-power-a3.html


    Quote Originally Posted by 16Klappe View Post
    Don't listen to him Tim, You're my hero, I'm proud of you.

  12. #11
    1st Gear

    Status
    Offline
    Join Date
    Oct 2011
    Location
    greater mcr
    Posts
    114
    Downpipe n decat deffo, just done mine n it sounds sweet :-). Turbo spools up quicker and you can now hear the turbo whistling on tick over :-) seems to rev much better too.

  13. #12
    Mi11ar's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    North West
    Posts
    316

    My Social Networking

    Visit Mi11ar's Youtube Channel
    Nice just ordered a full 2.5" system from blue flame with decat, looking forward to seeing the results

  14. #13
    Reverse Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    Scotland
    Posts
    18
    does that come ready to fit? stick it on and off ya go?

  15. #14
    Mi11ar's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    North West
    Posts
    316

    My Social Networking

    Visit Mi11ar's Youtube Channel
    Not sure good question haha

  16. #15
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2012
    Location
    Kent
    Posts
    459

    My Social Networking

    Add Tim_Attard on Facebook
    if your talking about the one i posted then yes straight fit 1hr job tops if the o2 sensors are a pita

    http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/187166-tims-max-power-a3.html


    Quote Originally Posted by 16Klappe View Post
    Don't listen to him Tim, You're my hero, I'm proud of you.

  17. #16
    Reverse Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    Scotland
    Posts
    18
    AUDI A3 S3 1.8T 3" STAINLESS STEEL DOWNPIPE DECAT | eBay

    Just ordering this one i think, whats the script with the lambda? havent looked underneath so can someone explain the change over? cheers!

  18. #17
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2012
    Location
    Kent
    Posts
    459

    My Social Networking

    Add Tim_Attard on Facebook
    yep buy it, easy to be honest just a bit tight sometimes, if you bolt the black box you can un clip them and removed the whole lot to make it easier

    http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/187166-tims-max-power-a3.html


    Quote Originally Posted by 16Klappe View Post
    Don't listen to him Tim, You're my hero, I'm proud of you.

  19. #18
    Reverse Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    Scotland
    Posts
    18
    What about the lambda sensor?

  20. #19
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2012
    Location
    Kent
    Posts
    459

    My Social Networking

    Add Tim_Attard on Facebook
    thats what i was talking about that there a bit tight on there just unbolt the black box etc, take a look and your get it

    http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/187166-tims-max-power-a3.html


    Quote Originally Posted by 16Klappe View Post
    Don't listen to him Tim, You're my hero, I'm proud of you.

  21. #20
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Online
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,572
    What is it about the Lambda are you specifically asking? as your A3 is a 2001 it will be an AUM engine code and wideband so the wideband lambda probe (one closest the turbo) MUST be fitted in the right hole... the second lambda (post CAT) will require a spacer (never used one myself so don't know how well they work) or for the post CAT probe to be coded out in the map...

    The DP you have linked to seems to have provision for both probes.. on some ebay DP's I have seen the post CAT fitting is capped anyway so doesn't see exhaust gas anyway...

    I would advise using an OE gasket for the turbo/DP (4 bolt one) as the supplied gasket are next to useless...

    Should also mention they (laughably) advertise this as A3/S3 DP.... it won't fit an S3 (neither will it fit an A3 quattro), completely different beast...

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  22. #21
    Reverse Gear

    Status
    Offline
    Join Date
    May 2013
    Location
    Scotland
    Posts
    18
    Good description, but i was wondering in basic terms, if i order that on ebay, and (for arguements sake) take it to my local garage, theyre would be no issues? obviously there are no gaurentees, but 99%?

  23. #22
    <tuffty/>'s Avatar
    Badger 5 Edition

    Status
    Online
    Join Date
    Sep 2008
    Location
    Gloucestershire
    Posts
    15,572
    Quote Originally Posted by murrayj07 View Post
    Good description, but i was wondering in basic terms, if i order that on ebay, and (for arguements sake) take it to my local garage, theyre would be no issues? obviously there are no gaurentees, but 99%?
    Having never fitted one personally I couldn't really comment...

    Issues you may have are mating the DP to the existing system... don't know the diameters of the pipework involved so its possible a reducer of some description will be needed..

    Only thing I can say about the post cat lambda is that typically without a cat it will throw a CEL and fault code (cat efficiency one normally)... so if it has a capped bung then this 'may' sort it but... on some I have seen the tube extends well into the DP essentially blocking it anyway so seems a bit pointless... just check this...

    Only way I know to guaranty no light is coding out...

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  24. #23
    vrbob's Avatar
    Thats no Moon, Thats a space station!

    Status
    Offline
    Join Date
    Jun 2007
    Location
    Southampton
    Posts
    2,363
    After putting my sports cat on my car I got the light on the dash which I could clear but would come back after 10mins.

    Got one of the lambda spacers off ebay for not too much money and it made the light stay off. I then got my software upgraded a few months later which coded out the light so have now removed the spacer so can confirm they do work.
    Audi S3 8L BAM 225 2002 - Ming Blue : Silver Heated Leather, Armrest, RNS-E - Bose, Alloy Mirrors, 18" RSTT`s, Sunroof, Cruise, AutoDim Mirror & Usual S3 Extras.
    Mods : Badger 5 Stg 2 Custom Map, FMIC, 3" DP & 200 Cell Cat, 007P, Jetex Filter & 80mm TIP & Heatshield, Complete LED Kit, Gen VW Aero Wipers, Full Powerflex Kit, R32 RARB, AP Shocks & Springs, 15mm Front & 20mm Rear Spacers, BB Uprated Actuator,
    N249 Delete & Catch Can, AP TVR 4Pot Brakes & DS2500`s, Sachs Carbon/Kevlar Clutch

  25. #24
    2nd Gear

    Status
    Offline
    Join Date
    Nov 2012
    Location
    Kent
    Posts
    459

    My Social Networking

    Add Tim_Attard on Facebook
    Get the decat, the garage wont have a problem fitting it, if they do then you need a new garage, i would strognly recommend doing it yourself tho, its probably one of the easiest jobs ive done on my car to date, your engine light will come on regarding the post cat sensor either get a spacer of ebay or get a map, map would be the more enjoyable route

    http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/187166-tims-max-power-a3.html


    Quote Originally Posted by 16Klappe View Post
    Don't listen to him Tim, You're my hero, I'm proud of you.

 

 

Similar Threads

  1. a3 decat pipe.
    By wackojacko in forum A3/S3 Forum (8L Chassis)
    Replies: 2
    Last Post: 14th May 2007, 07:00
  2. decat 1.8t
    By wackojacko in forum A3/S3 Forum (8L Chassis)
    Replies: 2
    Last Post: 13th May 2007, 17:43
  3. Decat pipe?????
    By chrisa4quat in forum Tuning
    Replies: 6
    Last Post: 4th May 2007, 16:06
  4. decat
    By slinky in forum A4/S4 forum(B5 Chassis)
    Replies: 7
    Last Post: 5th April 2007, 09:28
  5. 1.8T downpipe+decat?any good?
    By sam_20vturbo in forum A3/S3 Forum (8L Chassis)
    Replies: 14
    Last Post: 13th March 2007, 15:09

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