440ex 12.5.1 octane

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04-23-2004, 08:42 AM

davegex

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440ex 12.5.1 octane

what are you running for an octaine rating with a 12.5-1 compression piston. Is 105 to high.

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04-23-2004, 10:03 AM

SANDMAN430

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440ex 12.5.1 octane

probably a good place to start and test for detonastion from there

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04-23-2004, 07:56 PM

Ish416

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440ex 12.5.1 octane

Start with something around 97 and go from there. All gas is different, I run AV fuel without de-icer which varies from 107 - 118 octane. Then I mix it with some 91 octane. Runs pretty good.

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