does anyone remember the first emissions device mandated to be put on car engines ?
I think it was a rubber hose that went from a filter on the valve cover to the carburetor.
It really messed with the engine vacuum, the engine compartment was oily & the engine could hardly breathe.
It was soon after that time, that the Engines
Road Draft Tubes were blocked off & the PCV was put on Gasoline Engines
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The Road Draft Tube was a simple crankcase ventilation system used in older gas engines. It worked by creating a partial vacuum to draw crankcase gases out through a tube, venting them to the atmosphere. Airflow across the open end of the tube created suction, pulling the gases out when the vehicle was in motion.
All concrete roads had a black track in between the Wheel Tracks, it was from the engines Oil.
It turned out that the guy that designed it, was the Brother-in-Law of the California Governor that was in Office at that time.
It was found to be WORTHLESS after several years of Mandated Law, the ****** got very rich, so did that Governor.
That was the beginning of the EPA
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a video that helps to explain what a Road Draft Tube did, before the PCV was developed
Up until the advent of the PCV valve in 1963, automobile engines were free to dribble and puke the contents of their crankcases all over the landscape at wil...
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