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Mustang Forums
2011-2014 Mustangs
Engine/Tuning
Pulley down without a tune
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<blockquote data-quote="jn2" data-source="post: 15310756" data-attributes="member: 178010"><p>If your current tune is set up for 91 and you are okay, adding the 109 will keep it fine. That is more than enough octane to keep knock at bay. Just be sure to at least datalog to make sure KR stays at or below zero.</p></blockquote><p></p>
[QUOTE="jn2, post: 15310756, member: 178010"] If your current tune is set up for 91 and you are okay, adding the 109 will keep it fine. That is more than enough octane to keep knock at bay. Just be sure to at least datalog to make sure KR stays at or below zero. [/QUOTE]
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Engine/Tuning
Pulley down without a tune
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