Tuning with EGT

[don.broadus at exeloncorp.com]

Has anybody tried the new RTD type EGT that are on the newer cars they are
supposed to be much faster than thermocouples 

> -----Original Message-----
> From:	Jason R. Haines [SMTP:jhaines at lingenfelter.com]
> Sent:	Monday, March 05, 2001 11:37 AM
> To:	diy_efi at diy-efi.org
> Subject:	Re: Tuning with EGT
> 
> We used to use EGTs for tuning but have switched to individual AFRs. We
> have
> found the AFR to react much faster than the EGT. If you look at the time
> constansts for most thermocouples, the amount of time required to get to
> 90%
> of the actual reading is often measured in seconds while the UEGO sensors
> are measured in milliseconds. Also, you can be rich or lean and cause
> similar EGT's to occur depending on where the combustion is taking place
> (in
> the chamber or in the exhaust).
> 
> Just my $0.02
> 
> Jason
> 
> > Has anybody done air-fuel mixture tuning with exhaust
> > gas temp rather than O2 sensor?  I have read that the
> > thermocouple has a much quicker reaction time to high
> > heat/lean fuel conditions than an O2 sensor.
> >
> > If so, what are you getting for temperature readings?
> > I am wondering what temps (deg F) would equate to
> > optimum performance, without detonation.
> >
> > end
> >
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