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Sportster Motorcycle General Discussion and Problems For discussing problems about your Sportster motorcycle that don't fit anywhere else.

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  #21  
Old 21st November 2018
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Nibelungen Nibelungen is offline
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You over simplify and make assumptions.

That's really dangerous in mechanics.

The simple fact that those instructions apply to Sportsters and Big Twins, to different motors, means the data is high level.

The temperature of the oil in a Twin Cam Softail sump likely had a different relationship to the head temperature than the same on a Sportster.

Not to mention there isn't a magic point in an air-cooled motor where the oil temperature means the engine is warm (160°F according to that gauge) when of it's 1°F colder that means the engine isn't warm and doesn't evaporate moisture.

That's the assumption you made.
yes i have lateral thinking... it taken me out of trouble several times... using all instruments and Intel i could find at disposal....

then we can arguing also about limits and thresholds theories... but i think it's not the case since here is midnight...

but let me know at what temps then EVOs burn condensation... according to you... obviously not in a short ride...
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  #22  
Old 21st November 2018
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Originally Posted by Nibelungen View Post
yes i have lateral thinking... it taken me out of trouble several times... using all instruments and Intel i could find at disposal....

then we can arguing also about limits and thresholds theories... but i think it's not the case since here is midnight...

but let me know at what temps then EVOs burn condensation... according to you... obviously not in a short ride...
The problem is you're not going to find an answer that consists of a single degree of C or F above which it all gases off and below which none gasses off. There are other factors involved.

I can tell you for a fact I've found no emulsification in air-cooled EVO Sportsters operating in winter for rides of say 30+ minutes where the oil bag temp gauge didn't read above 150°F.

I'm sure it's a sliding scale of temperature and time. The hotter or the longer it is run the quicker it will get rid of moisture.

If you don't run it hot enough or long enough you'll condense more moisture when it cools then you got rid of when you ran it. But again that involves another factor, the ambient temperature. The lower the ambient, the more condensation as it cools.

If you do that repeatedly you will eventually find emulsified oil.

So to truly answer the question you need to graph oil temp, ambient temp, and time at minimum.
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  #23  
Old 22nd November 2018
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Nibelungen Nibelungen is offline
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The problem is you're not going to find an answer that consists of a single degree of C or F above which it all gases off and below which none gasses off. There are other factors involved.

So to truly answer the question you need to graph oil temp, ambient temp, and time at minimum.
that was obvious... but since the GENERAL claim of Mo.Co. we discussed previously... i'm confident that for a ride at least of one hour at 0 Celsius... if you are over 70 in the bag... you are sure condensation is being burned...
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