Posted by D Slater on September 01, 2012 at 07:41:36 from (184.15.7.159):
In Reply to: Farmall H and super H posted by Earl Borchardt on August 31, 2012 at 19:23:20:
Late H tractors got the crankshaft bearing journal size increase along with all the supers. H blocks came with 3-3/8 inch pistons. With thinwall sleeves the bore is increased to 3-7/16. Sh came with 3-1/2 and increased to 3-9/16 with thinwall sleeves. Cylinder head combustion chamber shape for gas engines was changed for real late H and SH. Manifolds and carburetors were different. Timing and some cams and cam gears were different. Late oil pans used a drain plug with a seal ring. Most H used a pipe plug. I have a H with 3-7/16 firecrater pistons that runs pretty good. Also have a SH with 3-9/16 firecrater pistons thats using some oil and getting lower on power but the super still has a good bit more power than the H. Both are running distributors with 22 degrees advance.
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