Buschur Racing ethanol content testing, mind blown.
#19
EvoM Community Team Leader
almost seems like false advertising. It should be called a gasoline content analyzer.
#20
Evolved Member
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Well done sir. Mind blown.
As i understand it, the sensor measures resonant frequency of the RC circuit created by the liquid. Gasoline being a higher capacitance fluid, ethanol being higher conductivity and lower capacitance, water being conductive and should effectively make it look like a higher ethanol content.
Makes sense on the 100% water... But the E90... Mind blown.
Wait... What happens with distilled water? As distilled water is a dielectric and it's the minerals in your tap water that actually make it conductive...
FWIW, I think all flex fuel vehicles use a wideband and use it to trim the afr on top of the content sensor correction. They can correct for water contamination this way.
As i understand it, the sensor measures resonant frequency of the RC circuit created by the liquid. Gasoline being a higher capacitance fluid, ethanol being higher conductivity and lower capacitance, water being conductive and should effectively make it look like a higher ethanol content.
Makes sense on the 100% water... But the E90... Mind blown.
Wait... What happens with distilled water? As distilled water is a dielectric and it's the minerals in your tap water that actually make it conductive...
FWIW, I think all flex fuel vehicles use a wideband and use it to trim the afr on top of the content sensor correction. They can correct for water contamination this way.
Last edited by 03whitegsr; Jun 26, 2014 at 05:03 PM.
#23
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This I needed to know. Great info as I was going to buy the sensor.... I think I'm just going to continue to use the test tube lol
Could it be that the water in your tank that you produced was actually pure water, and the mineral content in the tap water was throwing it off? Idk just spit ballin here
Could it be that the water in your tank that you produced was actually pure water, and the mineral content in the tap water was throwing it off? Idk just spit ballin here
#27
Evolving Member
iTrader: (22)
Nice testing. I haven't done any research on any possible differences in ethanol sensors between GM and Zeitronix, so bare with me, but do sensors found in GM vehicles analyze things differently with the same, or multiple sensors?
Very informative for everyone in the tuner/performance community thanks again Dave!.
Very informative for everyone in the tuner/performance community thanks again Dave!.
#28
EvoM Guru
iTrader: (50)
thanks for the vid. if the sensor is based on conductivity, it makes sense that tap water, which is high conductivity, appears as 100% eth. would be interesting to see DI water which is much lower conductivity.
curious as to why you are suspecting water contamination. i guess its not an unrealistic possibility for e85 from a pump, but since water+eth is a bad combo for a motor, i like to think it doesn't happen.
curious as to why you are suspecting water contamination. i guess its not an unrealistic possibility for e85 from a pump, but since water+eth is a bad combo for a motor, i like to think it doesn't happen.
#29
Evolving Member
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I apologize for not making this 100% clear, but yes, the GM or whatever variant sensor thinks of water as ethanol.
https://www.evolutionm.net/forums/10591085-post63.html
Great video!
I don't know why your "premium" ethanol fooled the sensor! I still have my logs and Everclear does in fact peg the sensor.
https://www.evolutionm.net/forums/10591085-post63.html
Great video!
I don't know why your "premium" ethanol fooled the sensor! I still have my logs and Everclear does in fact peg the sensor.
#30
Evolving Member
iTrader: (7)
I apologize for not making this 100% clear, but yes, the GM or whatever variant sensor thinks of water as ethanol.
https://www.evolutionm.net/forums/10591085-post63.html
Great video!
I don't know why your "premium" ethanol fooled the sensor! I still have my logs and Everclear does in fact peg the sensor.
https://www.evolutionm.net/forums/10591085-post63.html
Great video!
I don't know why your "premium" ethanol fooled the sensor! I still have my logs and Everclear does in fact peg the sensor.
Sorry for double post.
Last edited by evoredy; Jun 27, 2014 at 12:03 AM.