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GT S197 General Discussion This section is for technical discussions pertaining specifically to the V8 variation of the 2005 and newer Ford Mustang.

Should I re-tune?

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Old 06-16-2008, 12:20 PM
  #11  
Vapour Trails
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Default RE: Should I re-tune?

The proper revs/mile for the the stock 17s is 771 when using the predator. Online revs/mile calculators will tell you different, but ignore that, the predator seems to calculate it a little differently. Both my steeda and Bama tunes have 771 preloaded (and I indicated to Bama my tire size). With the change being so insignificant, I would just leave it alone.
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