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« on: March 20, 2012, 06:55:56 PM »
I like updraft cooling because (among other things) that cooling air hits the cylinder right where it needs it the most - the area around the exhaust port.Cylinders seldom crack anywhere else. Also, I've never actually seen a fast downdraft cooled EZ and I raced R.A.C.E. races for seven years. That one updraft opening does it all: Cools the cylinders, cools the oil AND provides ram air to the intake. It cools best when climbing and least when decending. When Klaus (who has the distinction of owning the fastest Variez AND the fastest LongEZ on this planet switches to downdraft so will I.