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I'm having trouble understanding how anyone who proclaims to be knowledgable in fluid dynamics can look at the snorkel and look at the intake without the shorkel and decide there isn't a flow benefit to removing it.
The intake is just as smooth and radiused into the intake without the snorkle as it is with so the vena contracta won't be an issue without the snorkel. The inlet area of the snorkel is smaller than that of the outlet, causing a pressure loss and the cup at the end of the snorkel will further restrict inlet flow.
I wouldn't guess what power difference removing the snorkel would make, but I can look at it from an engineer's perspective and know it's a restriction without a doubt.
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