Pictured real close up here was probably the last NOS, never started ever British Anzani B Stock gas engine left in the world at the time I assembled it out of a box some 5 years ago.
The stock gasoline fueled racing block is some 348cc with a bell shaped full width combustion chamber with 8 to 1 compression ratio as opposed to the 322cc Alky racing block used in North America that also featured a special Alky racing head with about half the CC volume raising the compression to some 14 to 1 as well the combustion chambers were offset to provide "squish" to make the compressed charge for Alky racing more turbulent for combustion than the stock version.
Of some interest was the Amal Monoblock round slide carb Anzani used for gasoline operation that worked very well but for Alky operation and greater amounts of air/fuel flow Bill Tenney the importer used OMCs Vacturi carb suitably venturi sleeved for North American class A or B Alky competitions.
Enjoy the pictures.
Bookmarks