A Trio!

[Chris Garner]

Hi Chris

I envy you having these engines to work on.  It must give you considerable insight into the development of the ‘sports’ engines. I especially like the intake manifold arrangement on the 75.

The chrome plated intake manifold on the Ulster can’t be standard can it?

Cheers

Howard

The car spent some time in the States - the Americans love to plate anything!!
75 and 65 intake manifolding is identical and thus interchangeable.

On the 65 engine I've just found     that the head is bronze. Photo enclosed.
Can anyone advise who made these and when? 
The Patent number refers to the Ricardo improvement of cylinders of ICEs, dated 22.07.1919.  
Internal head profile is identical to the Works 9E head.
There's always something new to find about Sevens despite " playing " with them for over fifty years!