RCU Forums - View Single Post - CONTINUATION..H9 HELLCAT FIRST 2 FLIGHTS
Old 06-29-2006 | 12:39 AM
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From: Butte, MT
Default RE: CONTINUATION..H9 HELLCAT MINES OK HOWS YERS?

2 to 3 times as large as the air intake hole is a good rule of thumb. 1" intake = 3" outlet and so on.. [sm=thumbup.gif]


Shane