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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Tune and Speedo
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<blockquote data-quote="Deleted member 12951" data-source="post: 740903"><p>I've noticed that my speedometer is 3 miles fast. Meaning if I am showing 80mph, I am really going 77mph.</p><p></p><p>Now that I got a tuner (iTSX with 5 Star), I noticed that I can change the revolutions on the tires per mile. So instead of bringing it to the dealer before returning it to stock to fix and possible see that the PCM has changed, I thought I could try myself to fix the 3 mile difference.</p><p></p><p>I assume this is how the dealer would do it anyways?</p><p></p><p>I have stock beadlock SE wheels and stock BFG tires. What is the default revolutions per mile? And which way would I change it, up or down and by how much?</p></blockquote><p></p>
[QUOTE="Deleted member 12951, post: 740903"] I've noticed that my speedometer is 3 miles fast. Meaning if I am showing 80mph, I am really going 77mph. Now that I got a tuner (iTSX with 5 Star), I noticed that I can change the revolutions on the tires per mile. So instead of bringing it to the dealer before returning it to stock to fix and possible see that the PCM has changed, I thought I could try myself to fix the 3 mile difference. I assume this is how the dealer would do it anyways? I have stock beadlock SE wheels and stock BFG tires. What is the default revolutions per mile? And which way would I change it, up or down and by how much? [/QUOTE]
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