o2 sensor location

[Bruce Plecan]

>   Place primary O2 Sensor[s] as close to Exh Manifold Flange as
practicable
> or if  equipped
>   with tube headers , place  in the " transition " where the 4
> primaries  merge into 1.  O2
>   switching response degrades the farther it's placed from exh heat
> concentration. HO2s
>   will reach and maintain the heat threshold quicker and promote CL
> Quicker. HO2s [better].
>    Len

The only thing I'd add to Lens reply is that at over 6' from the valve you
**can** start having O2 Latency problems, with some of the newer
calibrations.
The ecm expects to see a O2 change in x amount of time from a PW change.
I think someone long time ago was seeing a false 44 over that.
Was a real odd job/application
FWIW
Bruce


>
> At 10:38 AM 12/16/2000 -0800, you wrote:
> >Hello there.
> >
> >I have a question, I may of asked this before but I don't think that it
ever
> >got resolved.
> >
> >next week I'm getting my chevy 350 dual exhaust system striagtened out, I
> >have a 350 in a 72 jaguar xj6. I'm having an exhaust shop replace the
front
> >pipes with better fitting ones and install a crossover pipe after the
> >transmission.
> >
> >it has to be after the transmission becuase due to clearences I don't
want
> >to cook it.
> >
> >Should I put my heated o2 sensor in the crossover pipe that far back ? or
> >should I put it in one of the header pipes exiting one of the exhaust
> >manifolds ?
> >
> >I have a 3 wire o2 sensor, heated from something or other. I'm worried
that
> >it might not get hot enough that far back, vs reading only one side of
the
> >engine.
> >
> >thanks, Diane
> >
>
>---------------------------------------------------------------------------
-
> >To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> >in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>
> --------------------------------------------------------------------------
--
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
>

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org