markS2kcU

This is what it looks like inside the cat.




I took the cat off mine yesterday, took about an hour in all to do it and using the Mechanical O2 Simulator tip.

https://www.s2ki.com/forums/index.ph...&f=22&t=229959

Chris Type R

Any noticible performance improvement from decating ?

markS2kcU

Don't really know at this time, I can't say I said holy shite thats made it faster when I had finished.
What it has done has made it sound better what was the reason for fitting it now, I'm still waiting for parts to make the most of it on the performance front.

sparky2000

Still no joy with the car I'm afraid.

Had the cat removed last night and fitted a straight pipe-
Sounds like it is still on stealth mode.

The garage tested the cat and the Amuse with compressed air and felt they
were both letting air through normally, no blockage that would be significant.
The honeycomb in the cat also looked undamaged.
They said if the Amuse had been damaged, we'd likely hear a rattle noise.
I suppose being 99.9% sure the Amuse is ok makes be feel a bit better.

This is all getting very strange.

I'm going with the next plan which is to reset the ECU.

I just don't see how it can be so quiet if nothing mechanical is knackered!

(and please - no more "your deaf" comments)

If all else fails, I'm going to play about with different exhaust/ manifold
combinations as I kept all the original bits and will see if it goes back to normal.

Someone mentioned the ECU may not be compatible with the 4:1 manifold -
hopefully I have an answer really soon.

Fletch

Is there anyone on here that knows, or can get, an accurate decibel reading from the Amuse that Mark can compare with?

GSi

HKS was 85.3 at keevil on monday, not that is a great deal of use, but might give an idea..

surely one of the jocks can go listen /compare?

Lurking Lawyer

85.3?

Is that a typo, Rob? The same exhaust was tested at around 96.5 at 3/4 revs on my 02 at the Hullavington trackday.

GSi

3/4 revs? they seemed to think that 4,500 were sufficient

Amuse Boy

Deicbel readings for the dual:

idle: 68.2db
pre vtec: 89.5db
full throttle: 103.1db

Got these from a video that Durzel put together for the GB.

Fletch

Cheers AB. I forgot about that vid.