A/F Gauge
Senior Member
Joined: Jun 2007
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I think most everyone here will agree that anything other than a wideband A/F ratio gauge is a waste of money. I have a autometer wideband in my truck, install was pretty easy, run power for it and have a exhaust shop weld in the bung for you and screw the probe in. They mount pretty much like an o2 sensor.
Technical Article Contributor
Joined: Apr 2007
Posts: 3,807
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From: Pearl Harbor
get the Autometer one...it's about $300 for the entire kit...but you get the gauge, wiring and the wideband 02 sensor.
don't waste your time or money unless you are running a wideband with the a/f
don't waste your time or money unless you are running a wideband with the a/f
Technical Article Contributor
Joined: Apr 2007
Posts: 3,807
Likes: 2
From: Pearl Harbor
your OEM O2 sensor is only designed to sense a certain range...these are made up #'s, not real
lets say OEM sense from a 10-14 on a scale of 1 through 20
a wideband will sense from say an 8 to a 16 (or better) of that 1-20 scale.
since the wideband has a better scale to monitor, it is more functional for monitoring the parameters of the engine. they are also more sensitive
lets say OEM sense from a 10-14 on a scale of 1 through 20
a wideband will sense from say an 8 to a 16 (or better) of that 1-20 scale.
since the wideband has a better scale to monitor, it is more functional for monitoring the parameters of the engine. they are also more sensitive
Senior Member
Joined: Apr 2008
Posts: 974
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From: California
Narrow bands only work in the 14.2 -15.0 range. The ecu is always trying to target 14.7 for the best performance.
Wide bands cover everything else outside of those ranges. You really only need a wide band 02 if you are using a power adder. Most wide ban setups come with logging software for street tuning. Make a pass, pull the log, and adjust the fuel curve/trim as necessary. They are a great tool for making sure you have enough fuel when you take a power adder rig off the dyno. Most dyno's don't load trucks/cars like real world environments. More load = more fuel. Most of the time your truck will use more fuel when it is off the dyno... i.e. wind, grade, weight. Wide bans can save a motor when pressure is dropping off in a forced induction car, as they build boost they also build fuel psi on top of the normal psi which is mostly something like 39 + 1 psi per pound of boost.
Wide bands cover everything else outside of those ranges. You really only need a wide band 02 if you are using a power adder. Most wide ban setups come with logging software for street tuning. Make a pass, pull the log, and adjust the fuel curve/trim as necessary. They are a great tool for making sure you have enough fuel when you take a power adder rig off the dyno. Most dyno's don't load trucks/cars like real world environments. More load = more fuel. Most of the time your truck will use more fuel when it is off the dyno... i.e. wind, grade, weight. Wide bans can save a motor when pressure is dropping off in a forced induction car, as they build boost they also build fuel psi on top of the normal psi which is mostly something like 39 + 1 psi per pound of boost.
Last edited by sbchris; Oct 27, 2008 at 05:34 AM.
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Joined: Jun 2006
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From: Maricopa, AZ
