Re: Valve Clearance
Outside on minor improvements,Ford identified and held off doing major improvements to the A engine during A production.These were held to the introduction of the B:
1.bigger crankshaft,ultimately counter balanced
2.pressurized main bearing lubrication
3.Re designed camshaft
4.fuel pump
5.mechanical advance distributor
6.side mount fuel bowl,redesigned carburetor
7. larger runner intake manifold
8. Higher compression head
9. redesigned water pump
Plus other improvements on design,its amazing how much they moved forward with the engine..Some were not so good,block casting was suspect in the upper valve area and the compression increase was minor..some were real good,like pressurized lubrication, redesigned camshaft,the distributor and carb.All in all,alot of B improvements can be bolted on to an A engine..one,the mechanical advance distributor,will provide improved engine performance and eliminate the major cause of center main bearing failure,detonation (ping,or spark knock)...
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