I thought the cold air injection into the exhaust manifold was meant to
lower the exhaust gases temperature to minimize the production of one of the
pollutants. I don't recall which one but I don't think it was the carbon
monoxide. I thought the other pollutant needed a higher temperature
environment to "manifest" itself. I could be totally wrong...
San Diego, CA
----- Original Message -----
From: "Adam Bradley" <firstname.lastname@example.org>
To: "Chianese" <email@example.com>; <firstname.lastname@example.org>
Sent: Saturday, September 08, 2001 6:43 PM
Subject: Re: Anti-backfire valve
> The durability and longevity of smog pumps notwithstanding, doesn't
> combining fresh air with hot exhaust exiting the engine cause some of
> the unburned gases to ignite in the exhuast, creating cleaner exhaust?
> At least, that's what my service manual says. I realize it may not be
> a big difference and that your car may be able to beat the ppm
> requirements without it (which are adjusted upwards for wear & tear
> already), but I believe there's more involved than dilution.
> --- Chianese <email@example.com> wrote:
> > Those of us old enough to remember 1968 and the first air pollution
> > rules
> > will agree with Tom.
> > In all its wisdom, the government mandated emission limits in parts
> > per
> > million. It didn't take the engineers at most car companies to
> > figure out
> > that you just add more millions by injecting air into the exhaust to
> > dilute
> > the CO and NOx coming out of the engine. Unless you have a catalytic
> > converter or high temperature reactor after the exhaust manifold,
> > injecting
> > air does nothing to the QUANTITY of pollutants leaving the engine.
> > It only
> > changes the RATIO of pollutants to inert gas.
> > Once the Feds realized their mistake, It only took a year or two
> > before they
> > switched to measuring pollutants in parts per MILE. Air pumps
> > disappeared
> > instantly and catalytic converters entered the picture.
> > You can remove all that plumbing, valves and the pump without feeling
> > like
> > an ecological pariah; the car will put out the same quantity of CO
> > and NOx
> > regardless of the concentration in the exhaust pipe. In fact, since
> > you
> > don't have to expend power to run the air pump, you will actually
> > pollute
> > less by removing it.
> > Rick Chianese
> > Orlando, FL
> > SRL311-14035
> > _______________________________________________________
> > Alas, I love clean air... but a well tuned up roadster, with the
> > earlier SU needles, can run pretty clean without the air injection
> > set up.
> > Cheers,
> > Tom
> > ________________________________________________________
> > Hi List,
> > Does anyone have a spare anti back fire valve that they would be
> > willing to
> > part with?
> > Thanks
> > Deena & Joe
> > 69 1600
> > Westmont, IL
> '70 1600 SPL311-28181
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