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PieNsky · 09-12-2009, 11:08 PM

It was designed to run on the lower octane and using the higher would not provide additional hp. The higher octane has to do with the controlled burn needed for higher compressions however the direct injection negates that need for its use.

09-12-2009, 11:08 PM	#5
PieNsky Drives: Victory Red 1LS Join Date: Nov 2008 Location: Louisville,KY Posts: 1,928 View My Garage	It was designed to run on the lower octane and using the higher would not provide additional hp. The higher octane has to do with the controlled burn needed for higher compressions however the direct injection negates that need for its use.