Originally Posted by
Tim Kurcz
All early (Mark series) Mercs were alternate firing twins, or stacks of them phased evenly around the crank circle. So, pulse tuned exhaust is not possible. As a result, the 666 will run Parker converging stacks. Sam can confirm, but I'm pretty sure the first pulse tuned Merc six was the 1000 in about 1962.
Otherwise, I saw a rotary valve Mark 30H at Ted Millers about 10 years ago. Painted yellow, it was likely built for alky in an attempt to beat the Koenig, the builder unknown. Similar to a Champion Hot Rod, the questions is always; how well did it work? Will take a trip to Dick Austin's thread and check out his work.
For a moment I'd given thought to turbocharging the project, because of the easy to change external pyramid reeds. But then it wouldn't have that beautiful stack of carbs, or fearsome exhaust elbows and megs. Also, deflectors aren't the best choice for forced induction because of the pistons domes. So, it stays the "666".
Tim
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