On Mon, 16 Feb 2009 peterschop@aol.com wrote:
> OK, what is a Circle B head?
There were a number of foundries that cast heads for Triumph. The
foundries all used a different casting mark (usually on the front of the
head on the manifold side but under the valve cover).
Circle B is a scrolly-looking B (like the B in Bentley) inside a circle.
There are others, Block N is one.
The Circle B heads were sought after by racers as the castings are
reportedly thicker than the others, hence they make a better candidate for
porting and milling (e.g. you can take more material away without
compromising the head.
Regards,
rml
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Bob Lang NER/SCCA | This space for rent
Solo Chair 2008 TR6 40 F Prepared | Triumph!
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