17-04-2019, 11:03 AM
(This post was last modified: 17-04-2019, 11:06 AM by Chris Garner.)
[attachment=6134
]Dave Armstrong's excellent Speedex webpages on Special Cylinder Heads shows an early head of unknown provenance. Enclosed is a photo of an identical head which has come to light. Dave suggests the head may be experimental. The plugs are housed in very deep recesses and the combustion chambers are very deep over the valves. One of the core plugs is missing showing the walls of the water chambers to be thinner than normal. Although very unclear " 9C " could be cast on the upper surface.
Any ideas chaps?
Any ideas chaps?