multiple O2 sensors

[Mike Rolica]

Generally you want to aim for exhaust temp of 990-1100 out of head at idle
to 1500 -no load.  anything over 1500 and it is either to lean or timing is
too retarded (not enough advance) I have the dyno sheets of my ex temp for
each cyl. measured at 1" from head, center of header tube. Also shows deg
adv, AFR, vacuum, oil temp water tem ambient air temp etc.

> -----Original Message-----
> From:	Pat Ford [SMTP:pford at qnx.com]
> Sent:	Monday, September 13, 1999 9:39 AM
> To:	gm ecm mailing list
> Subject:	Re: multiple O2 sensors
> 
>  Hi All;
>  I'm building Al Lippers ecu6, and have some thermo couple interface
> chips that will go into the the spare analog ports, what temp should
> I aim for?? or is it go to maximum themp and the richen up abit??
> 
> Thanks
> 
> Previously, you (Dave Williams) wrote:
> { 
> { -> can't help much (it does help some) either way.  Exhaust temp is just
> { -> fine, actually better.
> { 
> {  I find the thermocouple response on my EGT to be fairly fast; since
> { you'd just use it as a trim to the final AFR I don't see that it has to
> { be "instantaneous" like an O2 sensor.
> { 
> {  I have looked longingly at some of those IR sensors though.  Makes me
> { wonder how fast the outside of the header tube responds to exhaust
> { temp... but it'd be influenced by ambient temp, air flow, etc.
> {
> 
> 
> --
> Pat Ford                           email: pford at qnx.com
> QNX Software Systems, Ltd.           WWW: http://www.qnx.com
> (613) 591-0931      (voice)         mail: 175 Terrence Matthews          
> (613) 591-3579      (fax)                 Kanata, Ontario, Canada K2M 1W8