Great thread Larry,
In an effort to combat the cooling issues with our E heads, we conducted a rather clumsy but effective experiment. Running dry decks, we split the cooling system into four zones, using an external Meziere pump. The left and right sides of the block got -10AN lines in the front and -10AN out the rear. We introduced water into each head with two -10AN lines below and to the sides of the center two exhaust ports. (We wanted to put the coldest water into the hottest area). Then three -8AN outlets on the intake sides of each head. The pairs Y together under the intake manifold and join into a 4-into-1 water manifold out to the radiator. See attached pics.
Other changes made to the motor were: Dropped compression from 12:1 to 11:1, changed intake rockers from 1.6 to 1.7 ratio and changed carburetor (same size). We expected a drop in power with the lower compression, but actually picked up 20 HP over our previous best. I cannot say that the cooling changes accounted for all of that, but it surely helped.
Dick Fulton
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