Join Today
Page 1 of 2 12 LastLast
Results 1 to 20 of 33
  1. #1
    Senior Member
    This user has no status
    Peanut1's Avatar
    Join Date
    Dec 2011
    Location
    Ashford, Kent
    Posts
    136
    Thanks
    5
    Thanked 20 Times in 16 Posts

    De Cat or not!!??

    Hey guys. Hoping someone can help me here. Cars going in Monday and i have the option of de-catting it which i think id like to do to improve response and performance along with the remap. I just wanted to see if anyone has ever done this before and had any issues especially on the auto box?

  2. #2
    Demented Tonka Toy
    This user has no status
    t5_monkey's Avatar
    Join Date
    Jan 2009
    Location
    Glasgow
    Posts
    6,222
    Thanks
    2,387
    Thanked 1,758 Times in 1,256 Posts
    You're probably better off going 3" downpipe with sports cat (with appropriate map)

    De-cat can cause serious insurance issues and there's a chance you'll fail the emissions tests come MOT time. Sports Cat is an option that will probably be a lot easier to live with.

    BSR stage 3, BSR Stainless Exhaust, Vibratechnics gearbox Mount, OZ 17" Superturismo Alloys, Bell FMIC, LED Side lights, LED interior Lights, Tinted Windows, Eibach Sports Springs, K&N Air Intake, 3" Sports Cat and Downpipe, Debadged, EST Strut Brace, EST Grille, Black Moose Stickers, Bilstein B8 Dampers, Fully Polybushed, CC3 all round, CF Wingmirrors
    Release the Monkey inside of you >>> Trunk Monkey

  3. #3
    Senior Member
    a 19t just isn't laggy enough
    p fandango's Avatar
    Join Date
    Aug 2004
    Posts
    19,785
    Thanks
    4,216
    Thanked 5,021 Times in 4,072 Posts
    being a P2 i bet it won't like it, got to have to 2 lamba sensors surely?

  4. The Following User Says Thank You to p fandango For This Useful Post:

    Santa (Friday 9th December 2011)

  5. #4
    Senior Member
    Skint and kanckered!
    I want a T5's Avatar
    Join Date
    Dec 2011
    Location
    Folkestone
    Posts
    963
    Thanks
    3
    Thanked 155 Times in 111 Posts
    Quote Originally Posted by Peanut1 View Post
    Hey guys. Hoping someone can help me here. Cars going in Monday and i have the option of de-catting it which i think id like to do to improve response and performance along with the remap. I just wanted to see if anyone has ever done this before and had any issues especially on the auto box?
    Oi Nut!

    Beware of the plod pulling you over and checking whether you have a cat or not....it is illegal not to have a cat when the car was made to have one.

    The way you drive, you are bound to get pulled for trying to do doughnuts in Tesco's car park.......its not an M3 you know!

    How about bashing the innerds out of the existing cat to create a de-cat that looks like you still have one. Has anyone tried this and would it stll cause issues with the Lambda sensors??

  6. #5
    Senior Member
    This user has no status
    Leeds_finest's Avatar
    Join Date
    Dec 2011
    Location
    Walsall
    Posts
    702
    Thanks
    137
    Thanked 80 Times in 64 Posts
    Aside from the Police problem ^^^ mentioned above, the P2 is fine with a decat. All you need to do is use a Lambda probe spacer to space the probe away from the main gas flow. You shouldn't even get a warning light then, let alone limp mode etc.

    On the V70 R, it's hard to do because of the prop shaft being near the exhaust etc, but, on the T5 it should be fairly easy.

    Decat will see faster spool up, sometimes as much as 500-1000rpm lower down the revs, increase power, increase response with the added potential of popping flames with a remap

    I personally will be decatting my S60 R... when money allows, which isn't at the moment.

    I wouldn't bother with race cats. Whilst they will pass the MOT etc and are fractionally better than a normal cat, the full benefit comes from removing the cat completely.

    Hope this helps.

  7. #6
    Senior Member
    This user has no status
    Peanut1's Avatar
    Join Date
    Dec 2011
    Location
    Ashford, Kent
    Posts
    136
    Thanks
    5
    Thanked 20 Times in 16 Posts
    Quote Originally Posted by I want a T5 View Post
    Oi Nut!

    Beware of the plod pulling you over and checking whether you have a cat or not....it is illegal not to have a cat when the car was made to have one.

    The way you drive, you are bound to get pulled for trying to do doughnuts in Tesco's car park.......its not an M3 you know!

    How about bashing the innerds out of the existing cat to create a de-cat that looks like you still have one. Has anyone tried this and would it stll cause issues with the Lambda sensors??
    I apologise for my mate!!! And your the one whos eaten all the doughnuts!! HAHA!!

  8. #7
    Demented Tonka Toy
    This user has no status
    t5_monkey's Avatar
    Join Date
    Jan 2009
    Location
    Glasgow
    Posts
    6,222
    Thanks
    2,387
    Thanked 1,758 Times in 1,256 Posts
    If quicker spool is the main benefit I think I'm alright as you can cough on the wee turbo on the S40 and it spools

    BSR stage 3, BSR Stainless Exhaust, Vibratechnics gearbox Mount, OZ 17" Superturismo Alloys, Bell FMIC, LED Side lights, LED interior Lights, Tinted Windows, Eibach Sports Springs, K&N Air Intake, 3" Sports Cat and Downpipe, Debadged, EST Strut Brace, EST Grille, Black Moose Stickers, Bilstein B8 Dampers, Fully Polybushed, CC3 all round, CF Wingmirrors
    Release the Monkey inside of you >>> Trunk Monkey

  9. #8
    Senior Member
    This user has no status

    Join Date
    Oct 2008
    Location
    west mids
    Posts
    190
    Thanks
    5
    Thanked 49 Times in 32 Posts
    Hi i am running a decat (cut out and welded back up) on a c70 t5 1998 fly by wire throttle twin lamba, i bought a lamba spacer but never fitted it as it has never put up a warning light ??? The car is running 1.4 bar flat out so no boost issues HLM mapped Ecu and the torque is fantastic, it flew round cadwell park this year and it has been 6 months since i cut out the cat and this is the big plus fuel consumption has risen from 22.4 on the display to 28.8 most of the time

    Regards
    Rob Gray

  10. The Following 2 Users Say Thank You to viggen For This Useful Post:

    bubba_1986 (Tuesday 31st January 2012),Peanut1 (Friday 9th December 2011)

  11. #9
    Senior Member
    This user has no status
    Peanut1's Avatar
    Join Date
    Dec 2011
    Location
    Ashford, Kent
    Posts
    136
    Thanks
    5
    Thanked 20 Times in 16 Posts
    Quote Originally Posted by viggen View Post
    Hi i am running a decat (cut out and welded back up) on a c70 t5 1998 fly by wire throttle twin lamba, i bought a lamba spacer but never fitted it as it has never put up a warning light ??? The car is running 1.4 bar flat out so no boost issues HLM mapped Ecu and the torque is fantastic, it flew round cadwell park this year and it has been 6 months since i cut out the cat and this is the big plus fuel consumption has risen from 22.4 on the display to 28.8 most of the time

    Regards
    Rob Gray
    I had 99% decided i was doing it and thats just made it 100%! cheers!

  12. #10
    Senior Member
    ...here we go again...
    LeeT5's Avatar
    Join Date
    Oct 2004
    Location
    Kent
    Posts
    5,337
    Thanks
    1,075
    Thanked 1,393 Times in 1,068 Posts
    Quote Originally Posted by Peanut1 View Post
    I had 99% decided i was doing it and thats just made it 100%! cheers!
    Good luck. Let us all know the outcome as i would be interested in this. Thou i anm with Monkey on the Lambda issues and EML coming on all the time.
    2014 V60 Polestar 6spd Auto :: Polestar map peak boost 17.4psi :: IPD 3" DP + 150cel :: Polestar 2.5" exhaust :: Paddle Shift Geartronic :: Black glass :: Maxton Splitter :: K+N Filter :: IPD Aluminium Top engine mount :: Brembo 6 pots :: 20" Polestar rims :: Brembo 371mm floating discs :: Sensus RTi + DAB + BT + WIFi :: D3S XENARC 6000k Active bending headlights

  13. #11
    Senior Member
    This user has no status
    Peanut1's Avatar
    Join Date
    Dec 2011
    Location
    Ashford, Kent
    Posts
    136
    Thanks
    5
    Thanked 20 Times in 16 Posts
    Will do no worries. Im having at done at a place called fast Road Conversions in Ashford which my mate owns so if it all works out and theres no issues I could introduce you if you wanted

  14. #12
    Senior Member
    ...here we go again...
    LeeT5's Avatar
    Join Date
    Oct 2004
    Location
    Kent
    Posts
    5,337
    Thanks
    1,075
    Thanked 1,393 Times in 1,068 Posts
    Quote Originally Posted by Peanut1 View Post
    Will do no worries. Im having at done at a place called fast Road Conversions in Ashford which my mate owns so if it all works out and theres no issues I could introduce you if you wanted
    Sounds good. I'm only up the road in Maidstone!!
    2014 V60 Polestar 6spd Auto :: Polestar map peak boost 17.4psi :: IPD 3" DP + 150cel :: Polestar 2.5" exhaust :: Paddle Shift Geartronic :: Black glass :: Maxton Splitter :: K+N Filter :: IPD Aluminium Top engine mount :: Brembo 6 pots :: 20" Polestar rims :: Brembo 371mm floating discs :: Sensus RTi + DAB + BT + WIFi :: D3S XENARC 6000k Active bending headlights

  15. #13
    Senior Member
    5 pot heart of a Volvo
    T5frankie's Avatar
    Join Date
    Apr 2006
    Location
    On the strip
    Posts
    24,505
    Thanks
    4,423
    Thanked 5,683 Times in 4,419 Posts
    get some nice flames out the back too

  16. The Following User Says Thank You to T5frankie For This Useful Post:

    theflyingbrick (Saturday 10th December 2011)

  17. #14
    Whiny Old Git
    Aching bones :(
    claymore's Avatar
    Join Date
    Aug 2009
    Location
    Shrewsbury
    Posts
    9,069
    Thanks
    4,385
    Thanked 4,999 Times in 3,015 Posts
    de-cat is an mot falure from january 2012
    PIC][/SIGPIC]
    aaaaaaaaaaaaaaaaaaaaaaaaa
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaa

    Facebook^^^^^^^^^^^^^^^^ Old T-5 Kompressor Thread^^^^^^^^^^^^^^^ New TT-10 Kompressor Thread

  18. #15
    Senior Member
    Skint and kanckered!
    I want a T5's Avatar
    Join Date
    Dec 2011
    Location
    Folkestone
    Posts
    963
    Thanks
    3
    Thanked 155 Times in 111 Posts
    /\ /\ what he said! /\ /\

  19. #16
    Senior Member
    Skint and kanckered!
    I want a T5's Avatar
    Join Date
    Dec 2011
    Location
    Folkestone
    Posts
    963
    Thanks
    3
    Thanked 155 Times in 111 Posts
    Has anyone punched out the innerds of the standard CAT?

  20. #17
    Senior Member
    This user has no status
    Al115's Avatar
    Join Date
    Feb 2005
    Location
    Herts
    Posts
    4,405
    Thanks
    672
    Thanked 887 Times in 593 Posts
    Yes in the past.
    Alastair
    Current: 2009 Cayenne GTS and a 2016 Prius IV... yes.
    Previous Volvos: 2009 V50 D5 R-Design, 2005 V70R, 2001 V70 T5, 2001 S40 T4, 2x 1999 S40 T4, 2003 V40 T4, 1999 V70 T5, 1996 854 T5 & 855 T5, 1995 855 T5, and a 480...
    Previous other stuff: Saxo Turbo, 2004 996 C4S, 2008 Z4M, 2001 Yaris T-Sport, 2002 S2000 Mugen, and a 1999 Evo VI



  21. #18
    Whiny Old Git
    Aching bones :(
    claymore's Avatar
    Join Date
    Aug 2009
    Location
    Shrewsbury
    Posts
    9,069
    Thanks
    4,385
    Thanked 4,999 Times in 3,015 Posts
    Quote Originally Posted by I want a T5 View Post
    Has anyone punched out the innerds of the standard CAT?
    I don't know what you mean
    PIC][/SIGPIC]
    aaaaaaaaaaaaaaaaaaaaaaaaa
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaa

    Facebook^^^^^^^^^^^^^^^^ Old T-5 Kompressor Thread^^^^^^^^^^^^^^^ New TT-10 Kompressor Thread

  22. #19
    Senior Member
    Just cant keep away from the
    Ovlovs lol
    daza-b's Avatar
    Join Date
    Nov 2011
    Location
    Somewhere in England
    Posts
    4,408
    Thanks
    1,191
    Thanked 760 Times in 623 Posts
    Quote Originally Posted by claymore View Post
    de-cat is an mot falure from january 2012
    well that sucks!! good job im friends with my MOT tester lmao
    Back with a 1997 S70 T5 SE

  23. The Following User Says Thank You to daza-b For This Useful Post:

    T5frankie (Tuesday 13th December 2011)

  24. #20
    Senior Member
    This user has no status
    Peanut1's Avatar
    Join Date
    Dec 2011
    Location
    Ashford, Kent
    Posts
    136
    Thanks
    5
    Thanked 20 Times in 16 Posts
    Quote Originally Posted by dazab View Post
    well that sucks!! good job im friends with my MOT tester lmao
    I couldnt possibly comment!!!!!


 

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
This website uses cookies
We use cookies to store session information to facilitate remembering your login information, to allow you to save website preferences, to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.
     
ipv6 ready