High Flow Catalysts and Test Pipes.

Law_
Posts: 1154
Joined: Wed Aug 05, 2009 3:37 pm
Location: Portugal

Re: High Flow Catalysts and Test Pipes.

Post by Law_ »

Dodo Bizar wrote:Over here CO should be 0.5% max, it is barely under 0.5% at idle and it is far over 1% at 3000 rpm which is tested as well here. Are those rules everywere the same? Lowering AFR mixture fixes CO, but then oxygen levels are too high and again fail...
In Portugal, the values are also the same or aprox. the same
It is common to remove the catalytic converter ceramic interior
Other solution is to install phalanges to re-insert the cat when the car goes to MOT (IPO). I'll study both possibilities next week !

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saxophonias
Posts: 2592
Joined: Fri Jul 03, 2009 6:03 am

Re: High Flow Catalysts and Test Pipes.

Post by saxophonias »

I had to place an exhaust silencer at my muffler as it was a bit noisy and i almost got a ticket the other days. :roll:
So i placed a detachable one. Have a look
Image
Power is there despite odds! I think it's even a bit faster. Backpressure maybe :roll:

Law_
Posts: 1154
Joined: Wed Aug 05, 2009 3:37 pm
Location: Portugal

Re: High Flow Catalysts and Test Pipes.

Post by Law_ »

i dont think backpressure is important so far from combustion chamber. but anyway, there are many many factors that count. Why was you going to take a ticket?
Cheers


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TassosNitrous
Posts: 11
Joined: Wed Aug 05, 2009 8:46 am

Re: High Flow Catalysts and Test Pipes.

Post by TassosNitrous »

Well, sax's car is way less louder right now however i used to like it the way it sounded before.
In fact, you could easily be fooled by its awesome sound since it gave you the impression the sound was coming out of a much faster car.

colsh
Posts: 4
Joined: Thu Oct 29, 2009 9:31 pm

Re: High Flow Catalysts and Test Pipes.

Post by colsh »

Hi everyone im new here, has anyone spoke about the presence of the f**king O2 sensor thats on the cat, all the test pipes i can buy have no threaded ends for a sensor......? any help. i know the car wont run properly without the secondary sensor as it works in conjunction with the first one on the Exhaust mani.

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mynameisowen
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Joined: Thu Aug 20, 2009 3:38 am
Location: London or Oxford, England
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Re: High Flow Catalysts and Test Pipes.

Post by mynameisowen »

hmm that is quite annoying, wasnt aware of that problem. is the o2 sensor before or after the cat??

Also make an intro thread so you can introduce yourself properly and show us your car!! :D
1996 EJ9 Civic
1998 BB8 Prelude Motegi VTi
1998, B16A2 EK4 Civic VTi

Aims:
EJ9 - Now my GF's car.
BB8 - Rebuild after crash damage to front end.
EK4 - Daily driver. Strip and track prep once prelude project complete

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saxophonias
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Joined: Fri Jul 03, 2009 6:03 am

Re: High Flow Catalysts and Test Pipes.

Post by saxophonias »

is it a d14 we are talking about?

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Dodo Bizar
Site Admin
Posts: 2009
Joined: Mon Jun 22, 2009 10:36 pm

Re: High Flow Catalysts and Test Pipes.

Post by Dodo Bizar »

Some OBd2b cars have the second O2 sensor indeed, I actually never had to work with one.

Ehm, my Megan cat replacement has a second O2 bung. I used it for parallel OEM lambda and ZT2 lambda measurements. Turned out they were spot on each other. So Megan is your brand.

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baz
Posts: 427
Joined: Tue Oct 06, 2009 3:57 pm

Re: High Flow Catalysts and Test Pipes.

Post by baz »

Got myself an omni power test pipe. Standard with O2 connection.

Good luck!
D14A3-OBD1-I/H/E
126 hp /145 Nm

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