hurricane octane rating

I was terribaly interested in the octane rating required for a hurricane but i found it mentioned as 79 in the M38A1 maintnance book p81. it took me an hour to find so i figured it should be posted. to my knowledge this should be the same for a 6.4:1 ratio f-head.

 

83 octane I think. might be lower.

 

I run waste gas in mine from work (gas from filter changes and station mantaince aka nasty stuff) , no issues. Mostly its a combination of gas diesel kero water and trash .

 

You haven't clogged any filters or gummed up your carb doin that, Jason?
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Bear in mind the octane ratings formula has changed over the years. Old octane numbers, I believe, are not the same as the current ones.

Doesn't matter, F-heads will run on kerosene or better....

More of a potential issue is vapor locking, corrosion, and so on, as different additives have been used to allow crappier gas to be used, and winter emissions to be reduced, etc

 

I copied a puff piece article from Automotive Industries magazine from April, 1950 entitled "Willys introduces F-head engine". It says: