Exhaust CAT legalities - ADRs and VICRoads

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cpitts
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Exhaust CAT legalities - ADRs and VICRoads

Postby cpitts » Tue Feb 20, 2007 9:43 pm

Guys,

With some investigations being done around dump pipe adjustments, I decided to get into the facts around what is and what isn't legal when looking at replacing bits of the exhaust and moving (or removing) CAT's around the exhaust.

I read VICRoads regulation VSI8 and VSI26 (both about Mods and Emissions) and neither say if you need to maintain the same number or location of CATs when changing exhausts!

So I rang VICRoads, and the guy on the tech line couldn't even answer if I needed to maintain the same numbe of CAT's or the same location as factory!! He's referred me to a vehicle engineer and I'm waiting a return phone call. :whistle:

I also read the ADR's 79 and 80 (Emissions control for light and heavy vehicles) and they simply state tests for passing the ADR, not what happens if things are changed. :(


Does anyone out there know facts that they've been given from a LV (Light Vehicle) certifying engineer?

Do you need to maintain location of CAT or just number? Or both?
'07 Lib GT Spec B <- adjusting
Done: Intake, Brakes, Stereo 90%, bars, AVO TMIC
To fit: Sil intake, ECU, 3 Port, Walbro
WWW (button below) for my Subaru/Audi dyno's, detailing, pics and mods!

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[MET]
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Postby [MET] » Tue Feb 20, 2007 10:41 pm

have you tried calling EPA? surely they would know they test you and do the inspection.

I have always known it to be all cats have to be retained in factory positions whether it be 1 or 5!

*shrugs* i'm not too fussed cause I just lurve my AVO TBE :thumbs:
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Postby Callahan » Tue Feb 20, 2007 11:10 pm

This is and always has been a real curly one hasn't it ?

My gut feel is that as long as it passes all the ADR and emissions tests will be the final word. The trouble is, who can test that stuff & certify it, and what is the cost & difficulty?
That's why I think that VicRoads stuff was written without reference to no. or position etc.
That's what the job of an exhaust(from an ADR point of view) is after all - emissions control ...

I think this is why MRT amongst others was able to move the cat under the floor & out of the dump???
Regards,
Les.
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Postby matlowth » Wed Feb 21, 2007 8:13 am

When I got done for not having a cat in the dump, I got told that it was something to do with cold-start emissions.

Cheers,
matt
2010 Audi TTRS

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GV
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Postby GV » Wed Feb 21, 2007 8:16 am

The copy of epa regulations I have, clearly states that the same amount of cats and position has to be maintained.

MODIFIED VEHICLE GUIDELINES 2006
TECHNICAL GUIDELINES FOR
AIR AND NOISE EMISSION REQUIREMENTS
FOR MODIFIED IN-SERVICE VEHICLES

10. Exhaust systems
Modifications to exhaust systems are permitted,
providing the modifications do not conflict with
other requirements of this document.
On vehicles fitted with one or more catalytic
converters, all the exhaust gas must flow through
the converters at all times when a vehicle is used
the road.
If modifying or replacing an exhaust system, make
sure that the catalytic converter(s) and any sensors
are positioned in the same exhaust flow location
with the original system. For example, some
manufacturers put the catalytic converter close to
the exhaust manifold so that it heats up very quickly
when the vehicle is started. This enables the
converter to function almost immediately. If placed
further down the exhaust system, the converter
cannot function as quickly and will allow
uncontrolled exhaust emissions to be emitted.

:thumbs:

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Postby FLYREX » Wed Feb 21, 2007 8:21 am

matlowth wrote:When I got done for not having a cat in the dump, I got told that it was something to do with cold-start emissions.

Cheers,
matt


I believe this is because the cats don't work/filter enough of the crap until they heat up a little.
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GV
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Postby GV » Wed Feb 21, 2007 1:02 pm


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Postby cpitts » Wed Feb 21, 2007 2:59 pm

Thx GV
'07 Lib GT Spec B <- adjusting
Done: Intake, Brakes, Stereo 90%, bars, AVO TMIC
To fit: Sil intake, ECU, 3 Port, Walbro
WWW (button below) for my Subaru/Audi dyno's, detailing, pics and mods!

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Postby Callahan » Wed Feb 21, 2007 8:32 pm



ummm ............ oh dear .... :oops:
can't do much can we ..... :wink:
Regards,
Les.
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Postby Random Dude » Fri Nov 09, 2007 12:35 am

FAQ'd!

Great work guys.
Brenton

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Postby T WRP10 » Sat Nov 24, 2007 1:20 am

What about resonators, can you pass with 1 resonator?

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