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Some extra Information on the previous and upcoming pictures
Locations - Some pictures were also taken at D Lake, Oregon, USA as well as some other race locations on the west coast.
Very much in the picture batches now as well as future batches are racing greats like Gerry Walin, Lee Sutter, Ron Anderson & his Bro, Jim Hallum (engine builder) and their relatives.
Hull types - Sidcrafts, Marchettis, Karelsons, deSilvas and others one off and homebuilts.
The very first 2 carb Anzani Jim Hallum ever built is featured here. Eventually Anzanis went from 1 to 2 to 4 and as many as 6 carbs feeding only the 2 cylinders. Ron Anderson followed Hallums leads in adding multiple carbs (Tillotson HLs self pumping carbs). Multiple carbs were more a west coast characteristic than out east by far. Few multiple carbed Anzanis appeared in the midwestern or eastern USA or eastern Canada. There were some single as well as 2 carb Anzanis being run out of Calgary and Edmonton, Alberta, Canada.
West Coast Anzani pipes like their eastern cousins were crescent shaped belles stacks but there was a difference. Bill Tenney supported each pipe from the main exhaust flange both upper and lower right off the exhaust port of the engine block. That gave Tenney's engine a distinct different look as the wester coast engines used the center head bolts and a support bracket to each pipe giving those Anzani stacks a "PacMan" crescent look to them and people did make those distinctions at races. Easterner and West Coaster.
Where Anzanis traditionally took a pressure line off the crankcase to pressurize the fuel tank and lines going to DelOrto up high fuel bowls on Bill Tenney spec'd prepared engines, the West Coasters adapted the fuel flow through and return to tank line system using a typical OMC pulse diaphram fuel pump with enlarged intake and ouflow fuel nipples to do the job. The West Coaster method took overhead weight off the engine by removing the DelOrton fuel bowls of which could be from one to three of them up there. The WestCoaster method also largely did away with flooding the carb or having the cork float sink in the Vacturi carb used causing flooding. The Vacturi carb under WestCoater methods became a "floatless" spill over and return to fuel tank system.
The four pipe (2 open megaphone & 2 expansion chamber (rams horns) Anzani is featured here which they eventually shed the 2 open megaphones to go into pure expansion chambers which added so much power to the engine that the earlier crankshafts could not take the pressures and broke.
A reverse blocked Anzani class A Alky is featured within picture batches upcoming. This method put the overhanging cast iron block over the transom and in the boat which served to cushion the vibrations incurred by overhanging the crescent shaped pipes rearward. This would reduce the cracking and breaking at the neck the cast aluminum towers they used. Some towers were subsequently made from steel and some even brass materials stock.
During this late 1960s period speeds in Anzanis went up to where 90 miles per hour on a Class A Alky hydro were happening. With a B class Alky Anzani speeds went up to 100 miles per hour occurred with some speeds as high as 107 miles per hour clocked but the official record came in with a two way average at just over 100 miles per hour was achieved. With both the class A and B Anzanis conventional hydros at 11+ feet in length were found to be too short as far as kilo boats were concerned. Popular oval course hydros were the Sidcrafts, Marchettis, Swifts, Ogiers, Karlsens. Some of the first pickelfork hydros turned up in the early 1970s at these kilo and 5 miles of racing trials.
There will be another batch of pictures being posted shortly after this post.
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