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    Opinions on 11:1 compression on 93 octane

    I was running a 413 with iron heads, a single plane intake, and 750 com edelbrock carb, with a ratio of at least 11:1. I had to run 93 octane plus 10% racing fuel to keep it from knocking. No amount of tweaking the timing helped. I went to a dual plane intake, Holly 750 (Summit) carb. With a lot...
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    Opinions on 11:1 compression on 93 octane

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    New Here

    Greetings from Florida. This site looks really super! I am glad to be aboard! I have a "66 Belvedere 2 door post with a built 413 powering it. Have had the car for 12 years. I belong to, and am an officer in the Citrus Mopars Car Club out of Inverness, FL. Greg
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