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Mystery cylinder head
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24-03-2021, 09:43 AM
I've had these un-machined cylinder head castings for more than 20 years and can't remember where they came from.
The possible suppliers were Barrie Argent, Alan Raeburn, Paul Bonewell or ????
24-03-2021, 10:08 AM
I dont know what they looked like but Lester Reader, long time owner of the Rubber Duck car in NZ, made a batch of two piece heads probably late 1950s. One of his special builder mates was a pattern maker. All had a workshop a few doors from me when i was running my RP as a teengaer early 1960s. They had outgrown Seven specials by then. Lester died about 10 years ago.
(I presume his exploits found their way into the UK magazine) 
24-03-2021, 10:17 AM
The only question I have is where do the spark plugs go without intruding into the water jacket?
24-03-2021, 11:45 AM
Umpteen years ago Alec King, longtime 750 member and trials exponent showed me a casting pattern and coreboxes he had made that would have resulted in that style of head. I remember being particularly impressed with the "loose piece" which allowed the plug recesses to be cast in to a shape which otherwise wouldn't have drawn from the mould.
24-03-2021, 12:41 PM
(This post was last modified: 24-03-2021, 12:43 PM by flywheel1935.)
looking at the inside of the casting webs my £5 is plugs in the side at about 45 degrees ???
seen something similar a few years ago, but now days I guess a CNC billet would look good too. (or 3D printing) |
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