04 6.0 xcal3 question - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 2 Old 01-15-2009, 12:27 PM Thread Starter
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04 6.0 xcal3 question

ok should i adjust my tire options or my gear ratios for fuel economy how do i get my gear ratios for the rearend how does the data log work
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post #2 of 2 Old 01-15-2009, 12:59 PM
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If you have 35's you want to put it to 590 revs per mile and leave it stock if you have a 3.73. If you have stock 31" or 33" tires just find out the revs per mile and set it to that on the xcal if your tuner hasn't already done it. Your gear ratio should be in on your door or in the owners manual.

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