Back pressure and torque

[John Hess]

Place a quick call to John Lingenfelter.



> ----------
> From: 	Corey L. Cole[SMTP:corey.l.cole at boeing.com]
> Sent: 	Thursday, August 28, 1997 12:39 PM
> To: 	diy_efi at coulomb.eng.ohio-state.edu
> Subject: 	Re: Back pressure and torque
> 
> 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)
> 
> -- 
> ======================================================================
> ========
> 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.
>