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| Gryphon Programmer Edge Product has discontinued the Edge Evolution 2, but we still provide support and tuning for it. If you have a question or comment relating the Gryphon (or Evolution) programmer, post it here. |
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#21
Fri, July 31st, 2009, 02:57 PM
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Your Tire Size (TS) is way too large! I'm surprised it's only 4 mph off. A larger circumference makes the PCM think you are moving faster than you really are.
Bill has this neat "Gear Ratio Calculator" in Pegasus that I use for TS. All you have to do is put "315/70-17" (notice the dash in front of 17) into the Old Tire Size box. You will immediately see 2672 mm in the Old Circumference box. Notice the "Squish" bax has a "5" in it. The circumference is being adjusted for a 5% "rubber squish" (what Ford uses). I get better results with 7%, so if you change the "5" to "7", you'll see 2644 mm. Try either of these values, and adjust as necessary. - Jack Last edited by Jackpine; Sat, August 1st, 2009 at 12:29 PM. Reason: Fixed stupid typo 
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#22
Fri, July 31st, 2009, 06:41 PM
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Jack, I am retarded
 I guess Bill set it up for me and when i went to change the tire size it was 2673 and what do you know? it is spot on  Thank you for the help!
__________________
2007 Supercab few mods here and there
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#23
Sat, August 1st, 2009, 12:31 PM
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Quote:
- Jack
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