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Query on port-heads
#3
Nate, in 1934 American Austin went belly-up. Bantam, which took over the operation, had the engine (a mirror image of the Austin Seven engine) redesigned. The obvious change was to the main bearings which were changed from ball and rollers to Babbitt.
Perhaps the motivation was to reduce manufacturing costs, perhaps to avoid paying royalties to Sir Herbert.

I gather from posts on here that Reliant, who made a copy of the A7 engine after Austin stopped making it, made a number of improvements before they turned to OHV.
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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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