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Air Fuel Meters for AFR..which brand and model is preferred?

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OK, I've searched the archives and really only found one topic on this from back in 2009. I am thinking that there may have been some tech advances since then, maybe not. I know to purchase a wideband unit as well as where to place the sensor in the downpipe. I have a few more questions for any experienced user of these units.

1. Innovative sells a exhaust clamp for the sensor (for a temporary reading/adjustment), I am sure others sell one as well. My question is, will the A/F reading be any different from this point as compared to the sensor being mounted in the downpipe?

2. I am just looking to dial in the weber 32/36 carb, not to race, just want a well tuned, fuel efficient carb. Can I get by with just the 02 sensor and gauge or do I need a sensor module as well? I know I don't need USB hook up.

3. There are several AFR units out there (Innovative, Split Second, AEM, etc). My budget is around $180. What would you recommend?

I haven't decided as yet, whether or not to permanently mount the 02 sensor and gauge (so I can use it on other cars), however, the answer to #1 above might make that for me.

Thanks for the help!

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I've been using the AEM, no issues for several years now.

Steve T.

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Ididnt read the links ^ but my innovate is nice ,weld a bung in both cars if you want to check afr. I think they want the sensor close to the motor for correct readings.

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I have an innovate with bung next to gearbox. Sensor died within 6mos. Got another, but have not installed yet. I did read about an enthusiast who had developed a better controller which works with a wifi router to send info directly to your phone or PC. I forgot the name of that and am searching again (not AEM -- though they have a wifi model as well). It was pretty reasonable too.

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Hi!

I put in an AEM Mechanical UEGO gauge alongside a water temp and oil pressure gauge in my center console.

1) Check out this clamp that AEM makes that doesn't require welding a bung.

http://www.aemelectronics.com/no-weld-o2-sensor-mount-2-inch-660

2) Both AEM and Innovate's guages are an all in one system that include the sensor module. The older innovate had a seperate sensor module and then a gauge but I don't think they sell it anymore. AEM also sells just a sensor module for applications that hook into a ems system or for hook up to an engine dyno.

3) Summit is selling the digital AEM gauge for 170 something, right in your range! http://www.summitracing.com/parts/avm-30-4100

you might not like the modern LED look, that's why I bought the mechanical sweep needle version

Good luck!

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I just dumped my Innovate and got this analog gauge. It's worked well for the past week. No calibration necessary.

http://autoplicity.com/products/294888-auto_meter_3870_gs_air_fuel_ratio_gauge.aspx

Don't order from Autoplicity if you are in a hurry or expect customer service -- but their prices are good (although it appears they are not offering this gauge anymore!).

GL.

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Keep in mind that the AFR sensors and gauges are set up for straight gasoline.  If used with an Ethanol blend -- like a 10% blend, the AFR readings should be reduced by ~4% to give the equivalent Gas AFR.  So, a reading of 14 is equal to an actual AFR of 13.5.

 

Byas

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