AFR setups and 2 strokes

[Dogmeat]

Is there any setup out there that has any sort of longevity to it?

I'm kind of tired burning my knuckles trying to take plug readings on my M sled

I would like to have something that just tells me where I'm at, but nearly everyone I've talked to says AFR gages are lucky to read properly past the first ride due to oil being burned in a 2 stroke...

Is there any setup out there, perhaps a heated sensor setup, that will work with any kind of longevity on a 2 stroke sled?

 

[Doug30racer]

there are many of the turbo guys running them to tune there sleds, I am going to install one before fall on mine but I am going to call the company to make sure that I do it right. Being there is not comstant battery source. They do work, but I am not sure how long either.

 

[Rick!]

My Wideband 2 AFR setup with a heated O2 will last just over 1000 miles on a sensor. New sensors are about $72 so it's fairly cheap to maintain the system.


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[minus40]

My Wideband 2 AFR setup with a heated O2 will last just over 1000 miles on a sensor. New sensors are about $72 so it's fairly cheap to maintain the system.


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- Sent from my iPhone using Tapatalk

I haven't had a sensor act up yet, what are the signs?

 

[Rick!]

I haven't had a sensor act up yet, what are the signs?

Basically reading leaner than usual. If you see 15:1 or 17:1 AFRs where they used to be, say, 13:1, then after checking fuel pressure and and for exhaust leaks and verifying those are good, then the O2 might be getting lazy. Deposits from exhaust interfere with comparing the O2 content in the exhaust with the outside O2. A WB2 has a little builit in test to roughly see if the O2 is still reasonably accurate.

 

[minus40]

Basically reading leaner than usual. If you see 15:1 or 17:1 AFRs where they used to be, say, 13:1, then after checking fuel pressure and and for exhaust leaks and verifying those are good, then the O2 might be getting lazy. Deposits from exhaust interfere with comparing the O2 content in the exhaust with the outside O2. A WB2 has a little builit in test to roughly see if the O2 is still reasonably accurate.

thanks, I check against a spare sensor once in a while and also do the self test. So far so good!

 

[fasta76]

Ive ran an AEM A/F on my M8 with no problems for the last 2 seasons. YouTube has videos of what to look for if it fails and how to test it.

 

[TheBreeze]

Minus and Fasta, are you guys running any leaded fuel? I am intersted to see what the longevity of these A/F sensors are as they are new to me.

 

[Dogmeat]

So how well do the Koso wide band setups hold up? Better or worse than the AEM? I'd assume its all probably the same Bosch O2 sensor, right?

 

[fasta76]

I'm not running any leaded fuel but have a buddy running VP race fuel in his TM8 with no issues! As for the Koso Ive herd they don't like to work all the time at start-up. You have to hook a switch up start your sled then turn it on.

 

[minus40]

Minus and Fasta, are you guys running any leaded fuel? I am intersted to see what the longevity of these A/F sensors are as they are new to me.

No lead, just pump gas

 

[Dogmeat]

I'm not running any leaded fuel but have a buddy running VP race fuel in his TM8 with no issues! As for the Koso Ive herd they don't like to work all the time at start-up. You have to hook a switch up start your sled then turn it on.

Is that for pre-heating the sensor then? Would AEM be a better choice in that respect?

 

[fasta76]

Is that for pre-heating the sensor then? Would AEM be a better choice in that respect?

I'm not quite sure why that is? Ive just herd about it and that made me go with the AEM!! I'm sure if you do a search you will find out about it! If i find it will post it for you.

 

[fasta76]

Is that for pre-heating the sensor then? Would AEM be a better choice in that respect?

Try this link. It talks about the switch.

http://www.snowestonline.com/forum/showthread.php?t=222935&highlight=koso+A/F

 

[Dogmeat]

Try this link. It talks about the switch.

http://www.snowestonline.com/forum/showthread.php?t=222935&highlight=koso+A/F

Why can you not run a Koso AFR gage off auxillary power? Thats where I have my Koso EGT gages right now and they work just fine ...?

 

[fasta76]

I beleve its because it takes so much power to heat the sensor. No issues with the AEM..

 

[taylorbok]

why not use egt's?

also koso makes an adaptor for 2 strokes it spaces the sensor out a bit and has a small catch canister on it but helps protect the sensor from getting gummed up with oil

 

[Dogmeat]

I beleve its because it takes so much power to heat the sensor. No issues with the AEM..

That would imply the Koso would last longer wouldn't it, being a heated sensor and all?

So basically what you have to do is, heat the sensor up with a 12v battery, then once it gets hot, you can switch it to sled power for the ride?

 

[fasta76]

The AEM is heated also! I'm just going off what I've seen with mine! I love my AEM no issues what so ever. If you want the KOSO go with that one.. Ive never herd a bad thing with the AEM. But have herd lots of issues with the KOSO.

 

[likkerpig]

I had a koso and it never worked worth a ****. Aem works every time. Sensors aren't too bad either ebay is a great place for those. I haven't had any issues with sensors and I usually run 1-2 gallons of Vp c-12 every tank. Even if you do a sensor a year its not that bad.