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Range Plunge With Modification

2982 Views 19 Replies 10 Participants Last post by  RickKeen
Three weeks with a Lariat and the extended battery pack. Added a 2" levelling kit and replaced OEM 275 60 R20 General Grabbers with LT 295 60 R20 Falken Wildpeaks. Mounted them on the OEM wheels. Lost 60 miles of range. Can the coefficient of rolling resistance be that much higher on the Falkens to do that ?
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How did you calculate the change in range?
When charging to 90% before the lift I was getting about 264 miles of range. With no change in driving habits my range has dropped to about 208 miles. I viewed an almost identical conversion done by TC Custom on YouTube and they lost only about 30 miles in a road test. Also it seems with every charge I am losing more. Sure like the looks of the truck though.
Let’s try this again. How did you CALCULATE the change in range? is this change based on Trip efficiency, long distance drive, normal drive until empty, range estimate from the trip computer, or the Guess-O-Meter?
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Thanks Voltz. Have done that.
Speedometer at 60 mph will GPS at 61.9
Guess-O-Meter is that display on the left (usually) side of your instrument display that gives a range number. They are notoriously inaccurate for a variety of reasons. On Fords it is conservative.
Have you reset your speedometer? If not, did you adjust your new efficiency value to take the change in tire size into account?
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