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poganin
PostPosted: Fri Mar 03, 2006 12:03 pm 
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Everyone knows that cat. is a brake for exhaust system. I would like to cut it off but... What about O2 sensor? I feel there can be some problems with it's readings. ECU will get bad data ...bla bla
What do You think?

Radek
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Sirius
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PostPosted: Fri Mar 03, 2006 2:22 pm 
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The O2 sensor is before the CAT so you should have no problems in removing it. :)

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Kris
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PostPosted: Fri Mar 03, 2006 3:37 pm 
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Agree with Mike! :)

There are downpipes available which improve further still when comp[ared to simply removing the internals of the cat.

Pictured below are the internals of the cat...

Image

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GTone
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PostPosted: Fri Mar 03, 2006 6:38 pm 
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No this is the internals of a cat :twisted: -------------> Click Here.

Two days of anger went into that photo :)


tone

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poganin
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PostPosted: Sat Mar 04, 2006 12:15 pm 
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So, all I have to do is get this something out of the pipe? Sounds easy. (it means it's not so easy as it look like :D - like always...) Did You feel car runs better without it. Did someone measure power difference after removing of cat?

Radek
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Kris
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PostPosted: Sat Mar 04, 2006 12:38 pm 
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Yes the car runs "better" without the cat.

Popular guess is that removing the cat adds ~5hp/tq ish

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andycaca
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PostPosted: Sat Mar 04, 2006 1:19 pm 
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turbo spools up faster too, giving you a shed load more torque :)

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stevenb
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PostPosted: Sat Mar 04, 2006 4:51 pm 
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Radek,
See if the exhaust fitter your going to can make you a custom de-cat pipe. If you do remove the internals of the existing CAT be very careful and wear a mask as the stuff is toxic.
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GTone
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PostPosted: Sat Mar 04, 2006 6:14 pm 
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Not one of those crappy paper masks either!

I noticed a big grin factor difference when gutting the cat manifold, but I noticed a bigger one still going for a 3" Aussie replacement pipe 8)


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