The O2 sensor system is really there to maintain a specific fuel ratio
required for the three way catalyst to work. Too lean and the NOx reduction
won't take place.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Alistair Bell
Sent: Sunday, March 18, 2012 4:07 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Catalytic Converter???? Anyone go without it???

oxy sensor before cat, put there in part to make sure cat does not get big
dose of un-burned fuel. Apart from that I don't know what specific
differences would be needed in the engine to accept a cat.

I was just curious about how an engine that came with a cat would run sans
cat. No moral or ethical opinions on the subject was included.

alistair
On 2012-03-18, at 12:34 PM, mcneely4@COX.NET wrote:

> Well, Alistair, you probably know (or made a reasonable guess) that I
> might not know that.  But it is reasonable to assume that the whole
> kit and kaboodle was engineered to run best with everything working
> right.  One thing that definitely would be different would be the
> presence of the oxygen sensor and its feedback to circuitry to control
> fuel and air.  What do you think the differences might be, if any?
> mcneely
>
> ---- Alistair Bell <albell@shaw.ca> wrote:
>> same engine was used in other countries sans cat. I wonder what the
engineering differences were? Any ideas Dave?
>>
>> alistair
>>
>>
>> On 2012-03-18, at 9:41 AM, Dave Mcneely wrote:
>>
>>> Marc, whether your state or local jurisdiction has an emission
>>> inspection requirement or not, the converter is required for legal
>>> operation of your vehicle.  Further, the vehicle is engineered to
>>> operate properly with a functional converter installed.  Sure, folks
>>> run without it.  Some folks kill others for money, too.  That
>>> doesn't make it legal or right.  mcneely
>>>
>>> ---- marc rose <mrose1028@GMAIL.COM> wrote:
>>>> I went to change out my worn out and rusted muffler on my 90 Carat
"Rosie"
>>>> yesterday and noticed that the converter was all busted up and the
>>>> ceramic is all but gone.  I live in an area that has no enforced
>>>> emission tests or anything like that. My question is can i can
>>>> safely run without the convertor.  I was going to just bust out the
>>>> rest of the ceramic and reinstall but was not sure how it would
>>>> affect the overall operation of the engine.
>>>>
>>>> Any thoughts??
>>>>
>>>> Thanks
>>>>
>>>> Marc
>>>
>>> --
>>> David McNeely
>>
>
> --
> David McNeely