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2004 to 2008 F-150 and Mark-LT
4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs.


 
 
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Old Thu, March 31st, 2011, 06:20 PM
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ticopowell ticopowell is offline
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When you load a tune is when you enter the tire size if I remember correctly.
To find the tire size, there are many options. the best one IMHO is to find from the manufacturer how many revolutions the tire will do in a mile, then divide that by 1609344.
1609344 / Rev per Mile = Tire Circumference in mm
The tire curcumference is what you will enter into the gryphon.
Also if you have a CS or a CTS then you might just put in 35"'s in the setting instead of the number you calculated.

I hope that covers ya, the manual for the gryphon should also explain that a little, might be easier to have the manual right next to you when you put in the tires size
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