jdoclogan
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As we look back on the late Stirling Moss's racing career most all of us deem him as one the greatest drivers of all time. Even though he never won an overall motor vehicle World Championship he was the daily champion for those that had the pleasure of his company. A true sportsman ( like all SAOCA contibutors) always stepping up to help a fellow racer/enthusiast even to the extent that he lost a shot at winning the 1958 Formula One World Championship. What does this have to do with my Vizard modification to a 1725 Alpine head. It was through the Moss like contributions to this site that provided me the pathway to execute the Vizard conversion. An article by Bill Mohr (http://sunbeamalpine.org/wp-content/uploads/2010/08/Vizard-Mod.pdf), supported by emails from Jim Ellis, allowed me to vision a Vizard alteration for my racing Alpine engine. Along with many other SAOCA member contributions, yesterday, I implemented the Vizard alteration. I still need to fill and drill the coolant passages.
My 1725 head with Vizard article on the work bench after alteration.
Closeup showing increased flow area around exhaust valve.
Note: In Mohr's article he speaks to the loading up of melted aluminum on a die grinder. Ten years ago I cutout the center section of an aluminum 5000 gallon water tank to make a 4000 gallon tender truck for wildfire fighting. At that time I learned a tip from a long time DOT Semi tanker truck inspector/technician (aluminum and steel) and TIG welder. Remove aluminum build up from a die grinder by quickly cooling the tip in water and then grind a piece of scrap steel. Apparently putting a bit of lubricant on the tip before grinding will help to prevent build up as well .
My 1725 head with Vizard article on the work bench after alteration.
Closeup showing increased flow area around exhaust valve.
Note: In Mohr's article he speaks to the loading up of melted aluminum on a die grinder. Ten years ago I cutout the center section of an aluminum 5000 gallon water tank to make a 4000 gallon tender truck for wildfire fighting. At that time I learned a tip from a long time DOT Semi tanker truck inspector/technician (aluminum and steel) and TIG welder. Remove aluminum build up from a die grinder by quickly cooling the tip in water and then grind a piece of scrap steel. Apparently putting a bit of lubricant on the tip before grinding will help to prevent build up as well .
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