Re: walmart tcw3 supertech
Well, not really like a Detroit. *They usually work by covering a portion of the ports to vary the timing/area or by opening and closing sub-ports to change the resonance of the pipe to give a broader power band. *They open based on RPM. *That is why they foul up, they aren't always moving (which scrapes the carbon off) if the motor spends a large portion of its time above or below the rpm at which they open. *That valve protruding into the exhaust flow tends to collect a lot of carbon.
Oh yeah, I'm not suggesting you run motorcycle oil instead of an outboard oil, I was just explaining some of the differences you may see between brands.
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