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Old 08-22-2012, 02:52 PM
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snrusnak snrusnak is offline
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If you run that high of octane you'll actually lose power. Like he said above, the hemi in stock programming is designed to run on 87, and run best on 89. I'd also put some 91 in it just to make sure you're getting everything you can out of it(just because it says 89 doesn't mean you're getting 89). Have fun and good luck!
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