Join Date: Aug 2003
Location: North Texas
Feedback Score: 0 reviews
Re: SuperChip 1704 question
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Yes the milage and power loss was immediate upon installation of the 285's.
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That doesn't make a lot of sense to me. I put 285's on my Excursion and it didn't make really any difference in power or MPG. I can boil the rear tires through 1-2 gear with the SC tuner. Without I can still get them going through 1st pretty well.
MPG is 12-14 around town and 16-19 on the HWY depending on all the factors, A/C or not, which SC tune (I actually think I lost 1.5 to 2 MPG around town with Tow tunr over HP tune) speed etc.
FYI, I never did get the rev's per mile changed either. Speedo is right on according to GPS.
Did anything alse change? In reality, your MPG according to your overhead should have started "showing" lower MPG becasue you're now covering more ground than you speedo/odo says you are becasue of the 1/2" or so taller tire. Mine is almost always right on compared to hand calc. MPG.
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2004 EB Excursion, 4x4, 6.0, Magnaflow Exhaust, Isspro Gauges in an under cubby pod, Fumoto, V code front springs, bubba lights and newly added so called bullet proofing, including PMax turbo.
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