30-04-2020, 07:14 AM
(This post was last modified: 30-04-2020, 07:19 AM by Bob Culver.)
The Big Seven is a very conventional monoblock engine much as established by the Model T and others and very similar the Ford A, 8, copycat morris 8, Austin 10 and very many others. Most cars had the main bearing caps bolted to the crankcase base but the Big Seven has the caps elegantly slotted into an extendedr crankcase. I gather this was carried on into BMC motors where the extra rigidity may have been helpful.
The Seven inlet ports are very large and it would seem practicable to divide, but when is a Seven not a Seven?
While c.r was below 7:1 and bores were small, ohv did not offer much advantage at normal rpm
The Seven inlet ports are very large and it would seem practicable to divide, but when is a Seven not a Seven?
While c.r was below 7:1 and bores were small, ohv did not offer much advantage at normal rpm