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Ronnieroadster · 09-17-2024, 05:59 PM

I have had previously and still have one early block that's bored 3-7/16 so a larger bore than 3-3/8 was and still is possible if one chose to do it.
Another item that added cubic inches prior to the 4 inch Mercury crankshaft the Ford 3 3/4 stroke crank with the larger rod journals but still floater rod style journals was offset ground to the two inch rod journal diameter. For rods the Ford 21A rods would be used you now had a 3-7/8 stroker. So a stroker crankshaft did exist prior to the Merc cranks coming out in 1949.
Ronnieroadster

09-17-2024, 05:59 PM	#2
Ronnieroadster Senior Member Join Date: Dec 2010 Location: East Coast in CT Posts: 1,778	Re: Old FH race cranks ( begfore the 8BA I have had previously and still have one early block that's bored 3-7/16 so a larger bore than 3-3/8 was and still is possible if one chose to do it. Another item that added cubic inches prior to the 4 inch Mercury crankshaft the Ford 3 3/4 stroke crank with the larger rod journals but still floater rod style journals was offset ground to the two inch rod journal diameter. For rods the Ford 21A rods would be used you now had a 3-7/8 stroker. So a stroker crankshaft did exist prior to the Merc cranks coming out in 1949. 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