How Fast

Kurt in NJ said:
Was it insert bearing or babbitt?
From the looks of the crankshaft the bearing burned up first —- the pounding loosening the nut and the single stud wasn’t up to the task of holding it together
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Exactly right. If the stud broke first the crank journal would likely look much better.
 
The rods in the busted engine had Babbitt bearings.
I do not remember the make of the oil pan gasket.
The rod cap failed first.
Since replacing that failed engine, my wife limits my speed to 55MPH on the highway. I travel on the interstates often cruising at 50 MPH. I leave a lot of space for modern traffic to cut in front of me. I do not compete with modern traffic in any way. Last week I ran down I-395 from Southbridge, Massachusetts to New London, Connecticut in pouring rain without any modern traffic issues.
My Model A's have 3.78 differentials & hi-compression cylinder heads.
 

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Hello unfortunate about rod throwing, I drive around 45 mph , car is stock . On past Ford Barn discussions tire size seems to be the big factor in braking , have the 19 x 4.75 radial on the 1931
 
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