Joined: Sep 2017 Posts: 20 Threads: 2
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Location: Melford/Cambridge
Clearly not designed to provide high compression. Could this be for a blown car?
Joined: Aug 2017 Posts: 1,715 Threads: 47
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Location: Auckland NZ
Car type: 36 Nippy, 31 RM, 38 Special, 24 Works Rep
I believe its a Brooklands head I would be interested i purchasing if it is for sale
Black Art Enthusiast
Joined: Aug 2017 Posts: 637 Threads: 29
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What does the top side look like Chris ?
Joined: Aug 2017 Posts: 172 Threads: 1
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Location: Richmond, Texas, USA
My first thought was Brooklands, too. Early primitive plug position rings a bell, designed more to protect plug than for optimum combustion. Later and better designs were much closer to the exhaust valve.
Joined: Mar 2015 Posts: 5,443 Threads: 231
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Location: Scotchland
I had one of these many years ago - I was told it was for a supercharged car but Brooklands sounds more exciting.
Joined: Aug 2017 Posts: 1,715 Threads: 47
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Location: Auckland NZ
Car type: 36 Nippy, 31 RM, 38 Special, 24 Works Rep
Ruairidh, I believe they did use an almost identical casting on supercharged Ulsters, although probably with a lower CR, so you may well be correct.
Black Art Enthusiast
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Location: Darkest Bedfordshire
I reckon you've nailed it John!
Just out of curiosity what is your source?
]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.
