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Ronnieroadster · 05-31-2026, 04:37 PM

So far after being involved in hundred's of flathead engine's I never came across any oversize cam bearing bores. Could it be possible during a short period of production the boring process for the cam bearing bores were machined incorrectly being to large a bore for the standard cam bearings. This would then be the reason for the needed oversize OD cam bearings. Makes one wonder why.
Ronnieroadster

05-31-2026, 04:37 PM	#20
Ronnieroadster Senior Member Join Date: Dec 2010 Location: East Coast in CT Posts: 1,778	Re: 59ab 80 over cam bearing So far after being involved in hundred's of flathead engine's I never came across any oversize cam bearing bores. Could it be possible during a short period of production the boring process for the cam bearing bores were machined incorrectly being to large a bore for the standard cam bearings. This would then be the reason for the needed oversize OD cam bearings. Makes one wonder why. Ronnieroadster __________________ I use the F word a lot no not that word these words Flathead, Focus and Finish "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 First Ford flathead roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH reset the record in 2024 to 211.830 running to mile four. Top speed 2024 mile five 220.672 exit speed 221.587