manifold pressure / CHT pickup

Con

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Apr 29, 2020
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I'm using the #4 primer port (Lycoming IO-320) for my manifold pressure restrictor. How do I get cylinder head temp on #4, or, alternatively, where else can I get MP?
 

Marc_J._Zeitlin

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I'm using the #4 primer port (Lycoming IO-320) for my manifold pressure restrictor. How do I get cylinder head temp on #4, or, alternatively, where else can I get MP?
CHT probes never attach to primer or injector ports, so these are orthogonal questions. Pull MP from one of the ports mentioned, or from a port you put in your intake ducting above the carb/FI servo.

Generally, Lycomings will have a CHT threaded well on the bottom of the cylinder into which you can screw the Dynon bayonet mount for the CHT probe. If you don't have a CHT port, you can use spark plug washer senders.
 
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