To be clear, I use Curil-T as a sealant along the engine case half
adjoining surfaces, and other critical metal to metal surfaces where
there is no other gasket due to critical tolerances. That's what it's
made for. I use Permatex Ultra Silicone (comes in gray, black, or red)
between cylinder bases and the case "spigot" interface to prevent oil
leaks at that joint. I don't put any kind of sealant between cylinders
and heads, as it's futile, given the temperatures. Only if I need some
kind of shimming to get the compression chamber volume in the right
range do I use a copper head gasket, they are not needed otherwise, as
the VW factory proved in 1940.
As for carburetors, that was a tough nut to crack when I was getting
ready to fly N56ML. I knew mixture control was important to proper
running and efficiency, which is why I was going to use a Weber carb
(since I had some and know how to tune them). Then I discovered the
Ellison Throttle Body, and they are very hard to beat. I usually fly
N891JF at about 145-150 mph. leaned way out, and burn around 3.3 gallons
per hour. That's 44 mpg! People have a hard time believing that, but
the spray bar with 50 tiny holes in it atomizes the fuel very well, and
leads to very good efficiency, and low engine deposits. And N891JF is a
very slick and aerodynamic KR2....
Mark Langford
m...@n56ml.com
http://www.n56ml.com
Huntsville, AL
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