RE: [DML] Emissions Tuning

["Darkstar" <darkstarmedia@xxxxxxxxxxx>]

oops, see what I get for doing email when I'm tired, missed the whole last
section...

Darkstar

-----Original Message-----
From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx]On Behalf
Of Darkstar
Sent: Wednesday, May 04, 2005 12:04 AM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: RE: [DML] Emissions Tuning


> If I remember correctly CO is partially burnt fuel, HC is unburnt
> fuel.  I think what you are seeing is a bad cat. the possibility
> of a rich condition is unlikely due to the high NOx.  you are close
> in every number so simply running the car at 3500 RPM for about a
> minute to heat the cat may work. if you have a non contact pyrometer
> you can measure cat function. the area atthe upstream part of the cat
> should be about 100 degrees cooler then the output side due to the
> chemical reaction. It's been a while since I have done smog tech
> stuff so I am a bit rusty. Anyone, feel free to correct me if
> I am wrong.
> 
> Darkstar

-----Original Message-----
From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx]On Behalf
Of Michael Townsley
Sent: Tuesday, May 03, 2005 5:50 PM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: [DML] Emissions Tuning

> my car has failed the new state auto emissions testing protocol in CT.
>
> The results were as follows:
>
>               HC(PPM)                CO (%)         NOx (PPM)
>
>
>
> Allowed       172                    0.55               1207
>
>
>
> Emissions     205                    1.52               1548
>
> Contributing factors could be that I have twin turbos with out cats > and
I have an exhaust manifold leak. I recall some previous
> discussion on the DML about adjusting the car to pass emissions
> testing without a cat (and if fact my car did pass 3 years ago).
> Can anyone tell me what tuning proceedure I should use to get the
> lowest possible emissions. Thank you.
>
> Sincerely,
>
> Mike Townsley




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