Let me see if I can clarify my statement.....
I mistakenly said that the air pump introduces air into the cylinder, Eric
was correct in that it does pump air into the exhaust manifold, or in some
vehicles to the catalytic convertor, or both. I apologize for the mind slip
there. I am unsure of the answer to Hugh's question about backpressure, but
suspect it does not contribute much as it aids in burning unused Hc
resulting in more flow not less. I still stand by my original statement
about removal of emission systems, however. Removal of these systems usually
do increase drivability problems.
Tim Hutchisen
71 TR6
80 TR7 Spider
> Hugh Fader wrote:
> >
> > I had to re-read Tim's note. I think you are correct. It does pump air
into
> > the exhaust helping to combust unburnt hydrocarbons. Now, here's a new
> > question. Does this increase exhaust backpressure? If so, there may be
some
> > efficiency lost from this.
> >
> > > -----Original Message-----
> > > From: Eric Conrad [mailto:conrade2@msn.com]
> > > Sent: Saturday, November 23, 2002 10:09 AM
> > > To: Tim Hutchisen; Hugh Fader; 'Graham McMicken'; 'Triumphs'
> > > Subject: RE: Emission Control
> > >
> > >
> > > Tim, et al,
> > > With all due respect, I have to take issue with your comments
> > > regarding the
> > > air pump.
> > >
> > > I will entertain comments counter to my feelings.
> > >
> > > Eric
> > > '76 TR6 (CF52678U)
> > >
> > >
> > > [tim hutchisen wrote:]
It's job is
> > > to provide fresh air into the cylinder to help the burn of
> > > hydrocarbons and
> > > carbon monoxides.
So...
> > > remove the air injection system if you want to:
> > > 1.) pollute the atmosphere more 2.) get worse fuel economy
> > > 3.) shorten the
> > > life of your engine and 4.) create _more_drivability
> > > problems due to rich
> > > A/F mixture.
> > >
> > > <<snip>>
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