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"Race" gas

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Old 08-17-2007, 03:22 PM
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oldbikenut
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Default RE: "Race" gas

You won't need more octane than pump premium (about 92 octane) unless you have some firebreathing type engine with a 10:1 or more compression ratio, or a high boost turbocharger.

My old ironhead has 9.5:1 compression ratio. She runs just fine on pump premium at about 92 octane.
 
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