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About Sonic Nozzles on Continental TSIO-550:
I thought that there were sonic nozzles on the COLD side of the intercooler welded to the outflow manifold runner in addition to the sonic nozzles on the HOT side. Bob Patusek challenged me on this and said that the welded tubes on the cold side of the intercooler were not sonic nozzles. Unconvinced, I took a look yesterday.
Bob's right.
The welded tube on the outflow manifold runner is cone shaped with a narrow (about 3/8 inch) diameter opening in it's upstream side. The interior of the tube is a cone with its base at the downstream opening that is about 1 inches in diameter. The exterior of the connector is cone shaped, too. It's a little hard to see in the photo due to the interference of the baffle that it pokes through. (See attached photos. I'm sorry for the quality of the photos--it was only a cell phone.) I don't think that this cone shaped connector qualifies as a sonic venturi. I understand that due to the denser, cooler air at this location a sonic venturi isn't necessary to control the outflow. Still, the cone shaped connector was what I interpreted as a "sonic venturi." That clears things up for me. Hope it helps someone else.
Barry Knotts
Lancair IV-P, Conti TSIO-550
Side view-note exterior cone shape.jpg
Looking up into connector.jpg
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