[s-cars] Emissions

[chris chambers]

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.
>
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=====
93 Audi S4
91 Mitsubishi Eclipse GSX
85 VW Scirocco 2.0 not stock :-)
73 Porsche 914 2.0 (67,000 original miles)


It's not how much you make, but how much you don't spend!

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