Air/Fuel Question
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From: Orlando, FL
Air/Fuel Question
I have been e-mailing ay guy at Gadgetseller.com to get info on there recalibrated A/F Gauges.
My question is how do I figure what voltage correspondes to a 12:1 ratio so the gauge can be
readjusted correctly?
E-mails to Gadgetseller
I'm interested in purchasing on of your modified AutoMeter Ultra
Lite Air/Fuel Gauges. I own a 99Lightning and was concerned about
it reading leaner than 12 to 1.
Steven,
The A/F gauges only read the voltage from the O2 sensor. You would need
to approximate the voltage corresponding to 12:1 ratio and use that as
your limit. From the chart on the "Gauge theory" page on my web site,
you can see that it is difficult to find the exact spot where 12:1 ratio
will occur. Temperature variation of the sensor will vary the reading a
little. From past experience, I will guess that the range on the
modified gauges will work well for you. You will probably want to be
around .90 volts or just under. Anything under .8 volts should cause
you to be concerned. This corresponds to the green, yellow, and red
LED's on the gauge.
What I am still not sure of is, will the gauge be able to read
a ratio that is leaner than 12 to 1? Thanks
Will the gauge read
Hope this helps some.
The gauge will read down to a voltage of .76 volts. I can't tell you
exactly what a/f ratio this will correspond to but it is lean enough to
melt most engines on regular pump gas. The voltage to ratio conversion
will be affected by the temperature of the O2 sensor. This is why many
people use the wide band sensors. If you are that serious about the
exact ratio, this is what I would suggest. The system will probably
cost you about $1000 though.
My question is how do I figure what voltage correspondes to a 12:1 ratio so the gauge can be
readjusted correctly?
E-mails to Gadgetseller
I'm interested in purchasing on of your modified AutoMeter Ultra
Lite Air/Fuel Gauges. I own a 99Lightning and was concerned about
it reading leaner than 12 to 1.
Steven,
The A/F gauges only read the voltage from the O2 sensor. You would need
to approximate the voltage corresponding to 12:1 ratio and use that as
your limit. From the chart on the "Gauge theory" page on my web site,
you can see that it is difficult to find the exact spot where 12:1 ratio
will occur. Temperature variation of the sensor will vary the reading a
little. From past experience, I will guess that the range on the
modified gauges will work well for you. You will probably want to be
around .90 volts or just under. Anything under .8 volts should cause
you to be concerned. This corresponds to the green, yellow, and red
LED's on the gauge.
What I am still not sure of is, will the gauge be able to read
a ratio that is leaner than 12 to 1? Thanks
Will the gauge read
Hope this helps some.
The gauge will read down to a voltage of .76 volts. I can't tell you
exactly what a/f ratio this will correspond to but it is lean enough to
melt most engines on regular pump gas. The voltage to ratio conversion
will be affected by the temperature of the O2 sensor. This is why many
people use the wide band sensors. If you are that serious about the
exact ratio, this is what I would suggest. The system will probably
cost you about $1000 though.
