I received these 2 parts lists many years ago after ordering items from Holbay for my Ford Crossflow engine. John Read – one of the owners of the company – was always very helpful with advice regarding the tuning parts he supplied. Paul Dunnell – who is the son of the other owner of Holbay – Roger Dunnell, provided further information on the company, and is documented in another section of this website.
Paul advised me that the Holbay 747 camshaft was fitted in the engine of the Lotus 7X Clubman racing car.
The camshaft designated as the Holbay K3A was fitted in the five 1700cc engines that Paul Dunnell built at Holbay for the Caterham 7 and designated by Caterham as the ‘R120’ car. The original Holbay R120 camshaft had been installed in engines used by Lotus such as in the one-off Lotus 7S, plus other Lotus Sevens as an optional extra. The Ford Motor Company also used the Holbay R120 camshaft in the engines of their very successful Works Escorts in the 1970 World Cup Rally.
Although Caterham only ordered 5 of the ‘R120’ engines from Holbay, Paul Dunnell later went on to own his own company, and sell numerous specially tuned (by his company), Ford designed engines to Caterham.
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