Posted by sotxbill on February 10, 2016 at 09:24:58 from (104.5.24.112):
In Reply to: up draft carbs. posted by F.E.Bear on February 09, 2016 at 18:43:44:
I AGREE... floats and needles were prone to sticking and tractors ran bad gas... So the updraft worked better in that environment. They prevented flooding, dilution of oil, hydro-locking, and fires by letting the gas drain below the exhaust manifold. ALSO kept carb low and helped avoid vapor locking from excessive heat and leaving a way for any gas bubbles to move upwards to the tank without being trapped.. pending fuel line design.
Improvements in carb and float technology allowed the addition of fuel pumps, and fuel pumps, allowed the elimination of vapor locking due to higher pressure lines having a higher boiling temperature. And then this allow down drafts, meaning that now (heavier than air) mixtures could flow downwards and give better starting and performance on newer designed engines. 12 volt systems allowed longer and faster cranking, allowing better starts.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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