Are you using the small 15 in. electric Black Majic fan or the mechanical water pump mounted one?  I have a 15 in. electric one that I recently found out is rated for UNDER 350 HP.  I paid 190.00 for it from Summit.  I don't think we are using the same one. 
		
	
		
		
		
		
		
		
		
		
		
	
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