[s-cars] Re: Emissions

[William Noland]

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The heat shield on my 94 is starting to deteriorate -- I plan to cut the
thing off and wrap the pipes.  Simple, elegant? and cheap.

Bill Noland
94 S4

>
>The heat shield in question from the original post is
>the one around the Y-pipe/downpipe, not the catalytic
>converters.  This is there primarily to get quicker heat
>up of the catalytics as it is upstream of the cats.
>
>Shields up Mr. Sulu.
>
>bob
>
>>I may be wrong, but I always uinderstood that the
>>shields were there to protect flammable material like
>>leaves, etc. from catching fire, not to keep the cats
>>hot. Therefore removing the shields only causes a
>>problem if you park over an area of dry grass,
>>leaves,neighbor's cat, etc.
>>
>>Chris
>>
>>
>>>Mike: I presume the reason that no one answered you
>>>is no one has
>>>actually tried to fix the heat shields - other than
>>>to pull the rusty
>>>bits OFF the "Y" pipe.  As I remember the story, the
>>>reason for the
>>>shields is to retain heat upon initial start-up so
>>>the catalytic
>>>converters "light" sooner rather than later
>>>(probably a matter of a few
>>>minutes earlier than without the shield).  I believe
>>>that once the car
>>>is warmed up, and the cat's are at operating
>>>temperature, there is no
>>>real benefit to the shielding (maybe some less heat
>>>in the floor of the
>>>car), if you aren't acutally driving.  If your local
>>>"Air Care"  exhaust
>>>emissions testing facility is like ours in Vancouver
>>>BC, they want you
>>>to have run the car for a least ten minutes before
>>>you go for the test
>>>(by the way, this is now on a 4 wheel dyno for the
>>>4WD (including
>>>quattro) cars).  As a result, if the air quality
>>>don't really care about
>>>those initial few minutes, then the shields have no
>>>real purpose.  Maybe
>>>it vas different in der Fatherland under strict TUV
>>>or DIN-type testing,
>>>yes?
>>>
>>>Dave F.
>>>
>
>--__--__--
>
>Message: 7
>Date: Tue, 25 Jun 2002 07:41:00 -0700 (PDT)
>From: jeff posto <jpostup at yahoo.com>
>Subject: Re: [s-cars] Stromung
>To: Peter Anderson <panderso at maine.rr.com>,
>	Scar <s-car-list at audifans.com>
>
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>
> Peter,
>I live in NH, and work in Mass.
>Write me off list.We can arrange a suitable meeting point.
>I have the latest Stromung "SS" on my 93 S4, so the fit, finish, and audio levels are accurate for you to assess.
>JEff Posto
>jpostup at yahoo.com
>
>  Peter Anderson <panderso at maine.rr.com> wrote: Is there anyone in northern New England with a Stromung exhaust (preferrably
>a recent system from one of the GP's) who would be willing to give me a
>drive to sample sound levels? I am in Portland Maine.
>
>Thanks,
>
>Peter Anderson
>93 S4 6speed
>
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