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Which octane for the Hurricane
Topic Started: Sep 7 2013, 07:49 PM (825 Views)
Goose
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I'm sure this has been discussed here before but maybe I missed it. So here's my question.

Knowing that ethanol (corn syrup) gunks up carburators and also knowing that a low compression engine (the Hurricane) works better with lower octane gas, and that higher octane gas has less ethanol (so I've heard).....which do you use in your Hurricane engine?

I'm at a loss here.
1963 CJ3B
Roaming the woods of WNC
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Bob_webber
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since last year iv'e put 87 octane in my hurricane, and i have logged 5000 miles since and have had no problems.

but then again my jeep tends to use the gas before it can go bad, i usually cycle a whole tank in 2 weeks.

i religiously get my gas at Bp, it may be a silly reason but i have always believed to get my gas where the firetrucks, and law enforcement go. and in my area they all seem to go there. :lol:
53 3b, early cj5 frame (hurricane),2.43 ratio t case 26 tooth with 1 1/4" case (my own creation), late 60's c5 ross steering box, all range od, parts from a welder generator, and parts from about 9 different jeeps and counting. my every last penny and ounce of patients creates what we call the FrAnken B, the jeep that never was

bob, north east Ohio
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bob in NC
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here in eastern NC, Beaufort, several of the local gas stations are now selling non ethanol gas. 4.18 gallon.
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oldtime
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I always run 87 octane in my daily driver because its the cheapest fuel with I can get.
I have to buy the 10% ethanol adulterated fuel mix in my area.
I have never tried the cheaper 15% ethanol blends and I never plan to do so.

Higher octane will not produce any more HP unless your compression ratio (C.R.) is above 8.5 to 1 ratio.
8.3 to 1 C.R. is merely an approximate estimate where the Hurricane may begin to pre-ignite on 87 octane.
I'm not aware of any modified Willys 134 C.R.'s ever used that were higher than 8.2 to 1.
Currently building my final F-134 powered 3B .
Rock Crawler using factory parts from the Willys Motors era (1953-1963)

http://s4.zetaboards.com/CJ3B_Bulletin_Board/topic/30228766/1/#new
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