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Old 11-29-2009 | 09:19 PM
  #1332  
codfish
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From: sellersville, PA
Default RE: Venus II

Cappa,

The cylinder is totally outside the cowl so you do not need any air exit in the bottom of the cowl.
If the cylinder was inside the cowl the rule of thumb is the air exit needs to be 2 times larger then the inlet.