How long do your AFR sensors last.

youngent · Nov 25, 2012

Just wondering how long they last and which system is best.
When I started with 2 stroke race motors I was told they would only last an hour or so due to the oil fouling them. Also leaded race gas is very hard on them. I only have egt on my 800 dragon turbo but have always wanted AFR.

Snopro_69 · Nov 25, 2012

Running 100 ll av gas. Only few hundred miles so I got egts. Gunna try the koso 2 stroke adapter this year. An also run a switch to my power wire an keep it turned off till engine gets good an hot is supose to help.

Edit: didnt notice I was in poo section but still the same basics haha

XP2009 · Nov 25, 2012

5 days riding killed my MTX. Try an AEM this year.

powerfuldodge · Nov 25, 2012

I have a 1000miles on my mtxl . Did a calibration last nite . Seems good

TurboMatt · Nov 25, 2012

powerfuldodge said:
I have a 1000miles on my mtxl . Did a calibration last nite . Seems good

I had the same experience with mine. Running race gas or 100LL all year. I just swapped it out in the off season as preventative maintenence. I put on about a 1000 boonedocking miles as well.

DynojetResearch · Nov 26, 2012

1) I ran an Arctic Cat M8 Turbo running 50/50 Premium and AvGas for 3600 miles on the same sensor. My AFR readings never jumped around or led me to believe that the sensor was failing.
2) That Same sensor I ran on my Arctic Cat went on my Turbo Pro when I began building it and rode for ~200 miles to see how it would behave. After that point, I installed a new sensor just to see how the readings might change -- and I saw absolutely the same AFR on my AEM gauge day after day. That sensor now is in my shop as a spare.
3) I built my father a 2010 Boondocker Turbo Arctic Cat M8 also with a wideband sensor - and he now has 2800 miles on his machine with that same sensor.
---I will note that how the sensor is installed is very key to their longevity. On my turbos, I utilize the HBX bung extender on each sled and also place the sensor in a near vertical orientation.

Wheel House Motorsports · Nov 26, 2012

the sensor spacer works awesome, helps keep nasty deposits off of the tip while maintaining good readings.

guidoxpress · Nov 27, 2012

this is my first year on a turbo and using AFR setup as well, so wondered the samething...so good to see these kind of results.

running an innovative AFR..i also have the extended bung with heat sink...should be pretty good pkg.

))))

m1kflyingtiger · Nov 27, 2012

What's the bennifet of the heat sink bung?

And random/off topic for the thread, so maybe a new thread, but is that a CMX? And if so could you post up a LOT more pics?

DynojetResearch · Nov 28, 2012

m1k-

The benefit of the heat sink bung is that it aids in prolonging the life of the actual sensor. The ceramic inside the sensor is designed to have an operating exhaust gas temperature never exceeding 1300*F, and the sensor housing should never be hotter than 900*F. To accurately measure the air:fuel content of your exhaust, the sensor Must be hotter than the gases flowing around it -- yes the sensor pre-heats itself using the 12V power that you've tapped into. If you do not let your sled run for a little bit of time (to allow current to flow heating the sensor) and the sensor has not heated up sufficiently before you hammer down the throttle (throwing hot exhaust at a cold sensor), this can also degrade your sensor as well.
The oil-rich exhaust of a 2 stroke also fouls the sensors more quickly.
Add in any leaded fuel and now we're really making life hard for these sensors.
By adding the bung extender, you can mitigate all of these adverse affects listed above. It shields the sensor from heavy deposits, and moves it away from the extreme heat of the exhaust to keep it more in the designed temperature range.

~T.J.

guidoxpress · Nov 28, 2012

m1kflyingtiger said:
What's the bennifet of the heat sink bung?

And random/off topic for the thread, so maybe a new thread, but is that a CMX? And if so could you post up a LOT more pics?

Great info above about the heat sink!! Thank you..

As for the CMX comment, if ur referring to me.. Lol..no it's my 06 rmk 900 turbo sled..lots of pics in my build thread in my signature

m1kflyingtiger · Nov 29, 2012

X2 on the thanks!

Definatly couldn't zoom enough on your profile pic and mistook the hood

http://www.crazymtn.com/album/index.html#cmxxhood.jpg

Good looking 900 though!

jsandgren10 · Nov 29, 2012

One reason I like the innovate gauge is they carry the sensors at places like auto zone and carry a year warranty so if it goes bad just go swap it.

Kraven · Nov 29, 2012

jsandgren10 said:
One reason I like the innovate gauge is they carry the sensors at places like auto zone and carry a year warranty so if it goes bad just go swap it.

My understanding was that regardless of the gauge kit setup, (AEM, INNOVATE, etc) they all use a BOSCH 0-2 Sensor

jsandgren10 · Nov 29, 2012

They do all use a Bosch sensor but not all autoparts carry the same connection to connect back to the AEM or Innovate gauge. But the one on Innovate is very common so its easy to get a spare or replacement.

diamonddave · Dec 21, 2012

So is this the extended bung that you guys are using?

http://www.innovatemotorsports.com/xcart/product.php?productid=16148&cat=250&page=2

DynojetResearch · Dec 26, 2012

Yes, that is the very one!

I would check around at other vendors too. $89 is the highest that I've seen them priced. $80 is average...

But in doing a little checking, it appears that KOSO sells them for $39.95 - and at first glance, they look to be the exact same product as all of the others.
http://www.kosonorthamerica.com/new/shop/snowmobile_access/adaptor-4/

~T.J.

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How long do your AFR sensors last.

youngent

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XP2009

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powerfuldodge

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TurboMatt

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DynojetResearch

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