Back pressure and torque

[swagaero]

Corey L. Cole wrote:
> 
> John Hess wrote:
> >
> > I DID go to the books.  Back pressure (and flow) effects the exhaust
> > temperature.  The exhaust temperature of a free flowing exhaust can have
> > an effect on the O2 sensor, since most depend on the exhaust to heat
> > them up into their operating range.  I have consistently had troubles
> > with cars with header systems not going into closed loop, simply because
> > the O2 sensor didn't get hot enough.  That is why I now install
> > electrically heated O2 sensors on cars with headers.
> 
> I always thought that the problem with O2 sensors and fabricated manifolds
> was that the thin wall tubing rejected heat much faster than the cast type.
> Furthermore, I'd also heard that ceramic coatings and thermal wraps can
> alleviate or eliminate those problems (plus keep you engine compartment
> cooler)
> 

I love to see it when everbody starts to think remember it's the amount
of heat that makes a o2 sensor work Put the sensor as close to the ports
as possible with batch fired use  just one cylinder and put it 2 inches
off the head wit sequentional put where all the runners come together.

Steve Parkman
> --
> ==============================================================================
> Corey L. Cole                     | I was standing on the side of the road,
>  M/S 19-HH                        |   rain falling on my shoe.
>  E-mail: corey.l.cole at boeing.com  | I was heading for the east coast,
>  Phone: 206-662-3596              |   Lord knows I've paid some dues.
>                                   | Tangled up in blue.
> ==============================================================================
> Disclaimer:  If I'm not speaking FORTRAN, I'm not speaking for Boeing.