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Query on port-heads
#2
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
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Messages In This Thread
Query on port-heads - by Nate M - 30-04-2020, 06:30 AM
RE: Query on port-heads - by Bob Culver - 30-04-2020, 07:14 AM
RE: Query on port-heads - by Ritchie Wilson - 30-04-2020, 08:08 AM
RE: Query on port-heads - by AustinWood - 30-04-2020, 09:05 AM
RE: Query on port-heads - by Mike Costigan - 30-04-2020, 09:34 AM
RE: Query on port-heads - by Renaud - 30-04-2020, 09:52 AM
RE: Query on port-heads - by Austin in the Shed - 30-04-2020, 10:23 AM
RE: Query on port-heads - by Alan - 30-04-2020, 10:26 AM
RE: Query on port-heads - by austin - 30-04-2020, 10:37 AM
RE: Query on port-heads - by Mike Costigan - 30-04-2020, 10:50 AM
RE: Query on port-heads - by Zetomagneto - 30-04-2020, 11:35 AM
RE: Query on port-heads - by Chris KC - 30-04-2020, 11:47 AM
RE: Query on port-heads - by Henry Harris - 30-04-2020, 12:19 PM
RE: Query on port-heads - by Hugh Barnes - 30-04-2020, 01:06 PM
RE: Query on port-heads - by Robert Leigh - 30-04-2020, 01:20 PM
RE: Query on port-heads - by Chris KC - 30-04-2020, 01:31 PM
RE: Query on port-heads - by Hugh Barnes - 30-04-2020, 02:07 PM
RE: Query on port-heads - by geoffharrison - 30-04-2020, 02:16 PM
RE: Query on port-heads - by Rogerfrench - 30-04-2020, 03:31 PM
RE: Query on port-heads - by Hugh Barnes - 30-04-2020, 06:27 PM
RE: Query on port-heads - by Henry Harris - 30-04-2020, 09:15 PM
RE: Query on port-heads - by Chris KC - 30-04-2020, 10:16 PM
RE: Query on port-heads - by Hugh Barnes - 01-05-2020, 08:12 AM
RE: Query on port-heads - by Bob Culver - 01-05-2020, 09:02 AM
RE: Query on port-heads - by Nick Lettington - 01-05-2020, 02:38 PM
RE: Query on port-heads - by Rogerfrench - 01-05-2020, 04:06 PM
RE: Query on port-heads - by Lowespeed - 01-05-2020, 04:18 PM
RE: Query on port-heads - by Archivist - 01-05-2020, 05:38 PM
RE: Query on port-heads - by Nate M - 02-05-2020, 05:02 AM
RE: Query on port-heads - by Jeff Taylor - 03-05-2020, 03:02 PM
RE: Query on port-heads - by Nate M - 04-05-2020, 07:08 AM
RE: Query on port-heads - by Rogerfrench - 04-05-2020, 02:18 PM
RE: Query on port-heads - by Bob Culver - 04-05-2020, 09:46 PM
RE: Query on port-heads - by Nate M - 05-05-2020, 04:47 AM

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