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Originally Posted by eschaider
By the way the the engine is very light. When I started I saw all the same 650# stuff. The real world is different. Aluminum Block 105#, heads complete 65# each, Crank 55# rods & pistons 15#, Dry sump hoses and pan 17#, Whipple blower and manifold 70 or 75# (I forgot).
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The internet source I saw actually claims that the aluminum block DOHC engine is 20# heavier than the cast iron SOHC engine. I have doubted that since Sean Highland said the aluminum block is 80# lighter than a cast iron block. I just don't see 2 cams, 16 valves and springs, slightly bigger head, and steel crank adding up to that much more weight.
I have a DOHC engine on the stand, but no way to weigh it short of dissassembly. It needs pulled apart anyway. Maybe this will motivate me to get started.