Automoeter A/F Gauge?
 

How accurate is Autometer's new Wide-Band A/F gauge? (#3378)

I've heard that the AEM EUGO 6-in-1 is very accurate, as well as Innovative's, but I'd prefer this gauge matches the rest.

Any experiences? Tests?

Also- How important is installing the sensor before/after any PCV or wastegate return?

I've used the AEM and the Innovative on a little SRT-4 I had. I tested both of them when dyno tunnig the car (423whp out of a 4 banger, not bad) and the Innovative was the closest to the dyno reading and the AEM was a very close second.

my Autometer in-dash wideband reads 1/2 number leaner than my BS3 wideband; BS3 says 14.7, A/M says 15.2:1. I have not verified it with my handheld............. :P

It could be that one bank is half a point richer/leaner than the other on my engine combo (possible, but I've never experienced it off that amount before), or else the BS3 or it are not accurate.

Jody

Y-TRY-

Our Wideband Air/Fuel gauge utilizes a Bosch LSU 4.2 sensor which we have coordinated directly with Bosch to develop a calibration specific and fine tuned to this sensor type. Minimally all Auto Meter branded gauges are designed to work within +/- 2% of the true reading, though instruments such as the wideband and full sweep electric stepper gauges tend to fall within tighter tolerances still.

Regarding the PCV or Wastegate issue, I'm not honestly sure how either of those would affect the sensor reading. I can tell you that the sensor needs to be placed post turbo due to potential back pressure related issues and that placing the sensor to close to the end of free flowing exhaust can result in reversion which will lead to inaccurate readings from the sensor.

Jody, regarding your situation, I'd want to know more about the sensor type used on the BS3, and where you have each sensor mounted in order to better address this question. An age difference on the sensors could also be a contributing factor.

both sensors are in the downpipes, approximately 2' from the turbo outlet. Both units are brand new; Mark had your narrow band gauge in here before as you did not have a wideband when he built the car. I bought your new wideband as soon as I saw it.

The BS3 uses a Bosch wideband O2, with the exact same harness plug as your gauge. May be the same unit, not sure.

Jody

Jody-

Doesn't sound like anything out of the ordinary from what you've described thus far. Not know exactly how the BS3 system is interpreting a signal from the Bosch sensor and how it's calibrated I can only work from what I know about our instrument. If you really want to isolate whether or not the difference in readings is truly different between banks, given enough harness length, you could swap the sensors and harnesses for each system bank to bank to see if the difference in readings follows the instrument / ECU or remains in place.

Just to clarify, you haven't lengthened or shortened the wiring harness between the gauge and the sensor for installation purposes have you? If so, that could account for a false reading. The gauge is calibrated to take into account a specific amount of resistance created by the harness assembly.

If as mentioned above the reading follows the gauge / ECU and you'd like us to check our instrument for calibration and accuracy, please let me know and I'll help get that arranged for you.

Kris, I'm not concerned about it. I haven't altered either harness. I was going to swap them side to side to see if they change.

Jody

Thanks guys! Your input is appreciated more than you know. Little decisions like this constantly haunt me during a build-up.

Gracias again.