Originally posted by Lee Nicolle
I just googled Waggott TC4V too find it was a 4 valve engine on a pushrod Ford bottom end. So I presume in the same vane as a BDA/BDG type engine.
Adavantages/disadvantages? Obviously in that era a local engine would be easier to maintain and probably cheaper too. Unlike now!
More like an FVA, having chain drive to the cams...
However, there was only one ever built on a Ford bottom end, the 1850cc unit used by Stewart and later David Seldon. Merv then made an alloy crankcase and used a sandwiched iron block for the cylinders, the architecture may well have been the same as the Ford engines.
I don't know what advantages there might have been over the BDG, but it would have had bigger valves, I feel sure, than the FVA, which was designed for 1600cc usage in International F2.