Have you consider outting some methanol in your tank to try out the effect of octane increase by methanol. Since you have a set of high flow injector, mix in the methanol with fuel might just work out perfect. 
 
A/f ratio for gasoline is 15:1 and Methanol is 6:1. If you run 50% methanol mix, you need to up the fuel flow by 30-35% or so. You could end up with an octane value not too far from race fuel. 
 
I am only suggesting since most oxygenated fuel sold at the pumps contains methanol, I think most of the components in the engine should be OK.
		 
		
		
		
		
		
		
			
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				Richard L 
aquamist technical support
			 
		
		
		
		
		
	
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