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Old 01-23-2004, 01:49 PM
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wilf leek wilf leek is offline
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Join Date: May 2000
Location: Leicester, UK
Cobra Make, Engine: Crendon, windsor 408 stroker, tremec. Also GSX008
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Question Octane rating US vs UK?????

I picked up on a totally un-related thread a while ago that there is a difference between US and UK gas octane ratings.

I believe that here in the UK, we use the RON octane rating (research octane rating?)

How does that relate to the US system, and how would one convert from one to another.

I ask because I am considering a mid-winter head skim/CR increase, and want to check out all the details before I do that. Currently running 9.5 : 1 with ally heads on a 408W.

UK fuel runs between 95 to 98 RON.
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Last edited by wilf leek; 01-23-2004 at 03:56 PM..
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