Catalytic converter
Submitted: Sunday, Jul 16, 2006 at 20:54
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Builders Mate
With the improvement in diesel these days, how important is the catalytic converter. I have a crack directly on the exhaust connection with the converter and will need to get it fixed soon. I'm thinking of cutting the converter out when I get it repaired.
Reply By: Exploder - Sunday, Jul 16, 2006 at 20:58
Sunday, Jul 16, 2006 at 20:58
If you get caught driving around without a Catalytic converter you will be up for a BIG fine i have herd $20,000.
AnswerID:
183831
Reply By: Member - Matt Mu (Perth-WA) - Sunday, Jul 16, 2006 at 21:15
Sunday, Jul 16, 2006 at 21:15
If you mean you are driving a diesel, then there is no catalytic converter. Suggest it might just be a resonator and no harm taking it out...just might raise the exhaust note slightly.
Matt.
AnswerID:
183832
Follow Up By: Member - Blue (VIC) - Sunday, Jul 16, 2006 at 23:59
Sunday, Jul 16, 2006 at 23:59
Modern diesels do have cat converters...
FollowupID:
440471
Follow Up By: Leroy - Monday, Jul 17, 2006 at 09:25
Monday, Jul 17, 2006 at 09:25
Yes I have one on my Trusty 3.0l Patrol.
Leory
FollowupID:
440498
Follow Up By: Member - Matt Mu (Perth-WA) - Monday, Jul 17, 2006 at 09:58
Monday, Jul 17, 2006 at 09:58
I stand Corrected!!
For compression ignition (i.e., Diesel) engines, the most commonly used catalytic converter is the diesel oxidation catalyst. The catalyst uses excess O2 (oxygen) in the exhaust gas stream to oxidize CO (Carbon Monoxide) to CO2 (Carbon Dioxide) and HC (hydrocarbons) to H2O (
water) and CO2. These converters often reach 90% effectiveness, virtually eliminating diesel odor and helping to reduce visible particulates (soot), however they are incapable of reducing NOx as chemical reactions always occur in the simplest possible way, and the existing O2 in the exhaust gas stream would react first.
To reduce NOx on a compression ignition engine it is necessary to change the exhaust gas - two main technologies are used for this - selective catalytic reduction (SCR) and NOx (NOx) traps (or NOx Adsorbers).
Another issue for diesel engines is particulate (soot). This can be controlled by a soot trap or Diesel Particulate Filter (DPF), as catalytic converters are unable to affect elemental carbon (however they will remove up to 90% of the soluble organic fraction). However, DPFs can clog and lose their effectiveness with time and use.
Enjoy!
FollowupID:
440501
Follow Up By: BILL from Fitch Fuel Catalyst Australia Pty Ltd - Monday, Jul 17, 2006 at 18:41
Monday, Jul 17, 2006 at 18:41
Check the vipac report and see what happens to NOx readings,and its on the web site.Sorry guys one just has to point these thing out,not pushing the product just informing of its effect.
Regards BILLS
FollowupID:
440584
Follow Up By: awill4x4 - Monday, Jul 17, 2006 at 20:38
Monday, Jul 17, 2006 at 20:38
Yup, the infamous "independant" Vipac test on a vehicle owned by a Futch distributor , driven by a Futch distributor, worked on by the Futch distributor and paid for by Futch.
Me thinks, very independant test that one.
Regards Andrew.
FollowupID:
440614
Reply By: Member - Stephen M (NSW) - Sunday, Jul 16, 2006 at 21:20
Sunday, Jul 16, 2006 at 21:20
Big NO NO, as said above you will get 1 huge fine if caught, but you can pull the converter out, get a metal pipe so that the diameter fits snuggly inside the inlet and outlet pipes and punch it through, make sure you punch it the same way it flows then put back on, who will know, I have never seen anyone use a probe (RTA) on a road side inspection or even the pits for that matter, the only person Ive ever seen is a mechanic if he's checking for some thing that may be wrong with the way your vehicle is running, in other words if you have a problem. Does make a differance lets it breath a whole heap better, the only problem is if everybody did this our kids wont be able to breath, when I was
young and stupid I did do this to my turbo VL commodore but now wouldn't think of it the way the green house is. Its for our kids future and the planet that they installed these on vehicles 86 onwards.I'm sure you want your kids to live a long and healty life ??? Regards Steve M
AnswerID:
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Reply By: disco1942 - Sunday, Jul 16, 2006 at 21:39
Sunday, Jul 16, 2006 at 21:39
Which diesels have cat converters?
PeterD
AnswerID:
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Follow Up By: GUPatrol - Sunday, Jul 16, 2006 at 22:03
Sunday, Jul 16, 2006 at 22:03
Most new diesels have...
3.0L patrol, Pathfinder, Discovery, new Jeep Cherokee 3.0L etc etc the list goes on....
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Follow Up By: Member - Mike DID - Sunday, Jul 16, 2006 at 22:21
Sunday, Jul 16, 2006 at 22:21
Pajero 3.2 DiD has Cat Converter.
Mike
FollowupID:
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Follow Up By: Blaze - Monday, Jul 17, 2006 at 03:28
Monday, Jul 17, 2006 at 03:28
Had
mine removed when I owned a Bravo, improved its down low power, and it isn't a Cat, I was informed by an Exhaust fitter and a Deisel mechanic its similar but not a true cat.
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Follow Up By: GUPatrol - Monday, Jul 17, 2006 at 09:42
Monday, Jul 17, 2006 at 09:42
Blaze,
That is the case in the Bravo but not on the others mentioned ie: the 3.0L patrol and the DID pajero etc etc.
They have true catalic converters...
Will
FollowupID:
440500
Reply By: TerraFirma - Monday, Jul 17, 2006 at 12:10
Monday, Jul 17, 2006 at 12:10
The big con here is that Cat Converters are restrictive, because they aren't , they typically run at around 98% efficiency. The only time they become a restrictive device is when they are faulty. So there is no reason to take out your Cat, plenty of reasons to keep it.
AnswerID:
183889
Reply By: Member - Stephen M (NSW) - Monday, Jul 17, 2006 at 14:24
Monday, Jul 17, 2006 at 14:24
And they do become faulty, my sister use to have mitsubishi colt, went to start one day wouldnt go, went through the whole process, leads,plugs,filters etc, and when it did fire it would be back up through the carby, turned out to be a totally blocked cat converter, ripped it out she wasnt paying for a new one at a cost of $500 from mitsi and had a staight through bit of pipe made up and welded in and the thing went better then it ever did from when she bought it new. So I do believe they restrict the exhaust flow. Just an experiance I have had with them. Regards Steve M
AnswerID:
183918