Sky InsuranceMonster Motorsport
Results 1 to 8 of 8
Like Tree1Likes
  • 1 Post By marknjayne

Thread: 3.2 decat

  1. #1
    marknjayne's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Sep 2011
    Location
    worksop
    Posts
    423

    3.2 decat

    going to be making up a decat for the 3.2 A3 on thursday,being built with shark performance,looked at the r32 owners forums and find that decatting gains around 15hp (they have run before and after dyno runs),not actually having a full decat as in the whole length ,all we are doing is cutting both cats out and using two 2" 460mm decats in stainless flanged to allow the cats to be put back if needed,also the cats will have flanges welded on for the same reason,will give more info on it on thursday when i pick the car up


  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    RedDejavu's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Feb 2011
    Location
    Bracknell
    Posts
    1,481
    how are you going to pass MOT with this mod?
    Be patient. English is tough.

    Now:

    61 Audi S3 BE S-Tronic Ibis White: Build Thread.
    / Black Edition pack (SatNav, Bluetooth) / Parking Sensors / Tinted windows / piano inlays and finish / Cruise Control / Interior light pack /
    /Mods: REVO Stage 2+: Revo Intake / BCS Powervalve TBE system / LOBA HPFP / Crystal Clear H11 FOGS / Black roof + spoiler vinyl wrap / H&R Anti-roll bars / Superpro ALK /


  4. #3
    marknjayne's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Sep 2011
    Location
    worksop
    Posts
    423
    Quote Originally Posted by RedDejavu View Post
    how are you going to pass MOT with this mod?
    im not,its for track use,if it works well enough though i may have some 100 cell cats made up,will need a better flowing exhaust ready for the supercharger anyway
    RedDejavu likes this.


  5. #4
    marknjayne's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Sep 2011
    Location
    worksop
    Posts
    423
    decats arrived,car now at shark having the necessary cuts and fitting




  6. #5
    marknjayne's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Sep 2011
    Location
    worksop
    Posts
    423
    fitted now,needs the lambdas to be fitted as i need to get some lambda bosses and have them welded in so the engine light is on due to the lambdas being temporarily disconnected and the car is running a tad rich ,again due to the lambdas not being connected,the noise is the exact same as before on tickover and only very very slightly louder under gentle load but as soon as you floor it from low revs (1.5k or so) you notice much more noise,more like an M3 rasp and more torque (never had a dyno run as to be honest they mean nothing,IMO its how the car goes and feels that is important,the dyno to me is only useful for data reading such as air fuel ratios etc),up above 5k you feel the overfuelling im 99.9% sure this is due to the lambdas not being connected,will update when they are fitted

    may look into having a switchable map installed so it can be run with or without cats






  7. #6
    devonmikeyboy's Avatar
    As far from JBS as possible !

    Status
    Offline
    Join Date
    Feb 2007
    Posts
    1,257
    Quote Originally Posted by RedDejavu View Post
    how are you going to pass MOT with this mod?
    Just replace the cat`s at MOT time then remove straight after.
    06 Audi 2.0 PD140 Sport TDI Quattro S-LINE.
    Old engine 330 bhp @ flywheel 263 bhp @ wheel 490 lb torque. Audidriver write up HERE
    Now stripped and playing with an uprated Cryo treated engine fitted with bigger turbo,water/methanol,uprated injectors etc etc.Wanting 400 bhp and 500 lb torque.

    Other car 500+ bhp MK4 Golf R32 turbo.

  8. #7
    paddy's Avatar
    Audi=No fault code, no idea

    Status
    Offline
    Join Date
    Feb 2008
    Location
    Surrey
    Posts
    5,135
    A before/ after dyno is hardly a waste of time because you will want to know if the decat actually did what its supposed to do or if its wishful thinking. TBH you are not really going to notice 15bhp on the road given that its less than 5% and then only right at the top where a cat might have restricted it. I did countless dyno runs on my 3.2 and there is defo a restriction somewhere be it inlet or outlet. We found we could get it up to 250bhp and not a single bhp more whatever we did. Even remapping !! something reaches its limit. for example we got 10bhp more with Tesco 99, it went from 240 to 250 bhp. We then remapped it and ran Tesco 95 and it ran 250 still with remap but add Tesco 99 again and it still stopped dead at 250bhp.
    Ibis white Revo S3 and now matching Vivaro LWB HR 2900 :-)

    Many people are alive because its illegal to shoot them.

  9. #8
    2nd Gear

    Status
    Offline
    Join Date
    May 2012
    Location
    perth scotland
    Posts
    423
    thread revival

    any videos of the decat on the 3.2?
    Audi a3 3.2 v6 sport back ,s-line, Dolphin Grey with factory tints, deg sat nav, bose speakers, 18 upgraded alloys, magnaflow exhaust, eibach pro kit springs

 

 

Similar Threads

  1. a3 decat
    By spencerdale in forum A3/S3 Forum (8L Chassis)
    Replies: 15
    Last Post: 13th December 2010, 21:03
  2. Anyone want a decat?
    By B5NUT in forum A4/S4 forum(B5 Chassis)
    Replies: 6
    Last Post: 1st June 2010, 13:11
  3. DeCat Yet Again!
    By Ronniebiggs in forum A4/A4 cabriolet/S4 forum(B6 chassis)
    Replies: 38
    Last Post: 22nd April 2009, 21:22
  4. S3 decat
    By vetch in forum A3/S3 Forum (8L Chassis)
    Replies: 6
    Last Post: 13th April 2009, 12:39
  5. 1.8T Decat.
    By RyanS3TT in forum A3/S3 Forum (8L Chassis)
    Replies: 3
    Last Post: 5th March 2009, 22:05

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