Wideband A/F Meters - Again, Maybe build our own?? Options

[brant]

QUOTE (Mark Henry @ Dec 24 2005, 09:51 PM)

I do know some systems need to be calibrated every so often. Which units require calibration? I have the WMS, it's $400, but no calibration needed and it also has data logging. http://sdsefi.com/wmsmm.htm

Mark,

I certainly have very little direct experience (1 day of dyno time with a wide band total)

but my understanding on the calibration was that it was to compensate for what amounts to "wear" on the sensor. build up caused by contaminants.

the propaganda from innovate claims that race fuel, use, leaded fuel, etc. cause a build up on the sensor and that the calibration can help the system adjust for this contaminant.

brant

[Mark Henry]

The WMS uses the Bosch LSU 4.2 sensor and Bosch calibration chip. It does it automaticly.

Lead will kill any/all sensors within time.

You can clean the lead out of the sensor by running it in a car using unleaded.Or you can use this stuff http://www.decalinchemicals.com/fueladditive.html but I hate additives.


BTW important note!!

You should never install a sensor without hooking it up!
Leave it off the car or leave it running!

Using it for just a bung plug will kill the sensor.



Heh-heh...Heh-heh, he said bung plug...cool.

[TimT]

QUOTE

but Do Not want to deal with carrying a lap top or complicating things at the track.

We typically have 3-4 laptops at the track.. I have 2 Panasonic Toughbooks...and yes they are tough

I log the a/f and other info into a DL1 or DL-90

after a run, I dump the file and have a look.. if there are any anamolies in a/f I usually know about it before I see it on the data logs.

anyhow I see laptops everywhere in the pits

[pek771]

An alternative:
http://www.scirocco.org/tech/misc/afgauge/af.html

Pat

[brant]

Tim,

I'm pretty certain that if I regularly log temp, pressure, humidity... I'll be able to guestimate my jetting without any lap top.

its just one more thing that I would have to pack... worry about... fiddle with...
plus Its a carb'd car, so I really only want to use the wide band for gross changes and tell what I'm doing to my current baseline.

I think if I were traveling out of state more I might benefit from the data and the lap top, but for just visiting my same old tracks over and over I don't want the hassle. (now If I were running a F.I. set up or a turbo monster like you guys, then I might feel differently)

K.I.S.S. (and focus on the driving) is my goal for next year
brant