[Fot] O2 sensors and AFR

[MadMarx]

I've written in Kas's book about these type of sensor.

To answer your questions:

1. The sensor responds at once, in most cases the gauge is too slow, that's
why I use a voltmeter instead
2. It is affected but after a few minutes there should be enough heat to
make it work
3. You won't see this I'm afraid. I didn't test it but one or two missing
strokes won't give a reading

Cheers
Chris

-----Urspr|ngliche Nachricht-----
Von: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] Im
Auftrag von Larry Young
Gesendet: Freitag, 27. Mai 2011 17:33
An: FOT
Cc: Tom Young
Betreff: [Fot] O2 sensors and AFR

I'm trying to use a normal narrow band O2 sensor to aid in dialing in an
engine.  I have a few questions about how these things work:
1. How quickly do they respond to a change, e.g. throttle position or load?
2.  How is the AFR reading effected by temperature?
3.  How does the AFR read if a cylinder is missing intermittently?
Based on info found on the web, I welded the bung about 4 feet from the
head.  Documentation with the Westach gauge says it should be 600
degrees.  Mine is running around 450.  The way I understand it, the
gauge fundamentally measures oxygen concentration.  If a cylinder is
misfiring, there will be oxygen and unburned fuel in the exhaust, not
the same as a rich mixture in a cylinder that is firing.  TIA
Larry
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