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  #1  
Old 28-04-2011, 08:42 PM
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Default DIY - 15 Min De-Cat (Newage)

How to save 70-100 (new price of decat link pipe), DIY De-Cat of 2nd Cat

Tools :
Big Hammer
Large Screwdriver
Large Bar (Trolley Jack Handle)
Pliers
Mask (optional, but recomended due to dust)

Quite a simple job if you know how to swing a hammer......

Cat starts to break up, after several blows of the Hammer on a large screwdriver or trolly jack handle inerted into the cat pipe.
Dust particles and small fragments of cat fall out :



Look inside, you can see the Cat breaking up.....



A few more blow and it all starts to fall out
Pliers will be needed to hook out the metal straps and wire mesh that originally held the Cat together.



All done.....completley empty canister


Last edited by Scott.T; 28-04-2011 at 08:44 PM.
  #2  
Old 28-04-2011, 09:07 PM
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puka, any difference in sound, with the empty square section would that act as resinator making the note louder??
  #3  
Old 28-04-2011, 09:11 PM
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Originally Posted by scooby doo View Post
puka, any difference in sound, with the empty square section would that act as resinator making the note louder??
Not fitted it yet.
It will get louder as the Cat acts as a silencer.
  #4  
Old 28-04-2011, 09:16 PM
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should sound really nice with your new rear box, im pretty sure i saw your car parked up by the side of the park the other day??
  #5  
Old 28-04-2011, 09:19 PM
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should sound really nice with your new rear box, im pretty sure i saw your car parked up by the side of the park the other day??
Yep took it down there for a picnic last weekend.
  #6  
Old 28-04-2011, 09:21 PM
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looked geat. and was a perfect day for a picnic,
  #7  
Old 29-04-2011, 09:47 AM
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nice 1 silversurfer,you could of done this a couple of weeks ago as i just paid 50 for decat pipe. lol
  #8  
Old 06-05-2011, 07:01 PM
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Simple de-cat, but what are you gonna do come MOT time?
  #9  
Old 06-05-2011, 07:50 PM
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Simple de-cat, but what are you gonna do come MOT time?
Still has main cat In downpipe.
  #10  
Old 06-05-2011, 09:15 PM
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Ah, but emissions may still be an issue but i guess that'd be upto your mot'r
  #11  
Old 06-05-2011, 09:35 PM
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Ah, but emissions may still be an issue
Nope they PASS the MOT test with just one cat.
Alot of people remove the large cat in the DP as this is the most restricitve. If they want to go full decat then also remove the above centre cat, then refit the centre cat only for the MOT. But you run the riskof a roadside VOSA test failing with both cats out.
  #12  
Old 07-05-2011, 09:32 AM
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only things of note, i'm not sure i'd be too keen on the dust that comes out of them - hazardous or not its an awful job to do and not one i will ever repeat
also, you now have a large cavity rather than a straight thro' pipe so not certain what that would do to exhaust flow but cant be good??
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  #13  
Old 07-05-2011, 09:43 AM
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So do we need a remap after doing this scott? It will be interesting to see what difference it makes to the sound and performance. Now, where did I put that hammer..................
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  #14  
Old 07-05-2011, 09:53 PM
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straight pipe would get much better flow..

Lucky,

if the car is standard and on standard map then you could get away with removing this cat.. if the car mapped already with this cat fitted then it would need an adjustment as it is finely tuned already to suit the current setup.

Simon
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  #15  
Old 07-05-2011, 11:20 PM
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Agree with all of the above, at the end of the day its free so worth a shot. A lot of other car marque/forum have been doing this sort of thing for year us scooby owners never take the cheap option, so I thought I'd buck the trend.
  #16  
Old 07-05-2011, 11:22 PM
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well it probably has to be better than the cat

in fact I think I have a decat pipe in the garage.. you could compare
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  #17  
Old 08-05-2011, 10:06 AM
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Good effort, but I thought scrap value for an old cat was around 50 (why some go missing off cars overnight), so why not scrap the cat and buy a 2nd hand decat for 50?
  #18  
Old 08-05-2011, 10:18 AM
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Good call
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  #19  
Old 09-05-2011, 08:13 PM
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Quote:
Originally Posted by Jolly Green Monster View Post
straight pipe would get much better flow..

Lucky,

if the car is standard and on standard map then you could get away with removing this cat.. if the car mapped already with this cat fitted then it would need an adjustment as it is finely tuned already to suit the current setup.

Simon

Cheers Simon, well obviously will need a tweak then. As I said, I need to book it in with you again as its got a bit of a hesitation when pulling hard in 3rd and 4th.
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  #20  
Old 09-05-2011, 08:32 PM
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Cheers Simon, well obviously will need a tweak then. As I said, I need to book it in with you again as its got a bit of a hesitation when pulling hard in 3rd and 4th.
if that is something it has only recently started doing? then it is most likely plugs or something along those lines as I presume it hasnt done it up until now? must be 18months or more ago we mapped it?

Happy to look regardless
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  #21  
Old 09-05-2011, 08:52 PM
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Originally Posted by Jolly Green Monster View Post
if that is something it has only recently started doing? then it is most likely plugs or something along those lines as I presume it hasnt done it up until now? must be 18months or more ago we mapped it?

Happy to look regardless

Hi mate,

Yes, its fairly recent and as you say it was 2 years ago!!. Its nothing major, but noticable. As you say though, could be plugs.
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  #22  
Old 09-05-2011, 09:05 PM
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Hi mate,

Yes, its fairly recent and as you say it was 2 years ago!!. Its nothing major, but noticable. As you say though, could be plugs.

maybe we could get Simon down to us on the same day to share his travel costs!
  #23  
Old 09-05-2011, 09:09 PM
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Let me know when!
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  #24  
Old 09-05-2011, 09:26 PM
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maybe we could get Simon down to us on the same day to share his travel costs!

I'm up for that.
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  #25  
Old 09-05-2011, 10:10 PM
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Quote:
Originally Posted by Lucky View Post
Hi mate,

Yes, its fairly recent and as you say it was 2 years ago!!. Its nothing major, but noticable. As you say though, could be plugs.
with the higher boost the plugs need changing (or cleaning at least) more often hopefully all it is..

Also check the clips on the coil pack plugs as they work lose.

Simon
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  #26  
Old 09-05-2011, 10:11 PM
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Rest in peace Simon.
 
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Quote:
Originally Posted by Hongkongfooi View Post
maybe we could get Simon down to us on the same day to share his travel costs!
could be arranged
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  #27  
Old 17-05-2011, 08:37 AM
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Nice job Scott - If you ever need to borrow it, I think I still have an original newgage cat virtually new that looks like your hawk one.
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