Daniel5691

Hi !
I would like to hear your experiences with air-fuel ratio gauges.
I understand the utility especially when initially getting a 928 into tune,
but I wonder if they continue to have some sort of ongoing or daily utility?
Thanks.

FredR

Dan,

I do not have one and do not perceive a need for one on a naturally aspirated LH/EZK 928 whilst using ST2. Where they would be useful [essential?] is if you are using one of those fuel system back pressure controller things to [crudely] tune a boosted application. This type of thing was the only option until Shark Tuner came along but the advent of this system made such redundant for LH/EZK equipped models like the S4/GT/GTS.

For earlier models like yours I would think it is a very nice utility to have and essential if you are doing any fuel tuning. Innovate do a kit with the wideband sensor and a gauge for $210 and you can also have the more expensive options with laptop interface [latest version is the LM2 with data logging capability starting at $350].

Beyond that it is a matter of personal taste and some folks doubtless like to see the assurance of an analogue needle- nothing wrong with that.

Rgds

Fred

Ad0911

Do these things need calibration every now and again?

FredR

Ad,

To achieve accurate AFR measurement wideband sensors have to be calibrated in air upon commencement of operation. As to how often they should be re- calibrated I am not so sure. They are designed to be in continuous operation but can be used intermittently as I do. In my case, every time I mount the sensor I do the free air calibration but then I am not sharktuning every two minutes either- on average my usage pattern is probably about once every year or so for two or three weeks at a time.

With no better info for continuously mounted systems I might suggest a calibration check every year would be in order- others may have a different point of view.

Rgds

Fred

928bro

I have it on my 1980 and I enjoy know that my mix is died on. I had a problem that it was running leaner then it should and then I found the problem which was the O2 sensor that went bad on me, it only give me more security that it's a gauge worth having. I getting ready to by the water/batt gauge too because I feel at times the reading is off and I just want to make sure that there isn't a real problem going on. I did go with Innovate and picked up the air/fuel set for under $150. on ebay

terry gt

yes , removed the ashtray and put in in , close the cover and it and its hidden . with a rebuilt brain and pems , sharktuning is easy . Its another tool for checking the engine .

Arch1t3ct

I feel like any modified turbocharged vehicle should have a wideband AFR gauge. If you're relatively stock and have a good tuner, you can get away without, but for anyone pushing high horsepower numbers it's an inexpensive way to know how safe the car is running, and can help catch a problem before something blows up.

AFAIK they do not require calibrating. I've had an AEM UEGO in my wrx for several years now, and have been pleased with it, and I'm picky with my gauges.

Ducman82

its a cheap monitor for my engine on my car. plus it runs/helps me tune my megasquirt set up.

some kits "recommend" you open air calibrate a sensor once a year. i went a few years with no issues. i do calibrate mine before i tune, or as needed.

toofast928

I have two AEM WB. Each o2 measures two cylinders on left and right bank. AEM is very accurate and quick to react and has the ability to record. Every key-on cycle the gauge calibrates itself. Over the years I have compared the onboard AEM to dyno readings and even an flying Ease tool (Pico Scope). I find that the AEM gauge is equivalent or more accurate to anything measuring at the tailpipe tip.
My gauge set is located in the glove box.

Crumpler

I have mine integrated into the dash as an ashtray delete.
I would say it has merit both as a tuning device and also looking pretty.
My only issue is trying not to look at the readings all the time...