Quote:
Originally Posted by AdventureDad
.... it "seems" that open to the atmosphere has a downside of increased emissions, but a positive of: lower amounts (by a lot) of fuel in the oil, less viscosity breakdown and better for the engine.
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IMO, having the crankcase vented directly to the atmosphere is the
best for the engine.
In the October issue of MCN, the article on blowby gases says 60% of those gases are oil mist, which increases the carbon buildup inside the engine.
The TW200 has the crankcase gases go directly into the airbox.
Here's the result: (the photo was taken after I had scraped off about half of the carbon deposits)
This leads me to believe that venting the crankcase directly back to the airbox is the worst for the engine.
I think using the OCS is a compromise, although if the fluids deposited in the OCS drain tube leak out on the ground, it's nearly the same as venting to the atmosphere.
Quote:
Originally Posted by AdventureDad
Why did you go back to stock with these readings?
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I reinstalled the OCS to the stock configuration because I want to try the higher temperature thermostat, and see what difference that makes.
Depending on the results, I will probably change back to venting to the atmosphere (technically illegal is the US).
jb