Re: Engine parts

Posted by Bob Carabbio on January 02, 1998 at 19:21:22

In Reply to: Engine parts
posted by Durward on January 02, 1998 at 10:48:22

The "B" engines aren't "Pressurized" in the strict sense, but do have direct feed from the oil pump to the main bearings.The rods are splash lubed same as "A"s.
The big difference in the "A" and "B" is the main and rod journal diameters which are much larger in the "B".A "B" crank won't fit between the Main cap bolts in most "A" blocks without some journal reduction.
'33 and '34 "B" engines are counterbalanced, '32s aren't.There were three different cranks:
One with no C'balance
One with the weights pressed on
One with the weights cast integral.
Flywheels used with the C'balanced cranks are 33 pounds lighter.
I believe the "B" pump is essentially identical to the "A" pump, but for better flow, the shaft necked down like the early "A" shafts even though the housing bore is large like the later "A" units.
Bob Carabbio

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