Cost Effective 2.5l "bristol" Engine
If one was thinking about producing a new block and head one should
consider the weak points of the existing design and if it would be possible to
improve on this without building a complete new engine.
One point to think about is the amount of land between the bores especially
between number five and six cylinders.(a hot area) If Bob Gerard removed
the liners to increase the size of the engine it would have made the
reliability a serious factor. Percy Kemish (responsible for the racing engines)
told me the head sealing to the block gave them a problem with the racing
engines although he did find a way to make the engines last the length of a
race but this was always at the back of this mind.
Food for thought.
Bellerophon
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