Freeway mine gets about 18-19 with my set up. This is at about 75 mph and turning around 3 grand. If you go slower like 60-65 it gets better. Power isn't too big of a problem unless there is a steep hill or big headwind. There will be a difference in the two motors but since all my friends with 6cyl and same tires are geared higher, they arent much faster up the hills. On level ground though they can go 80+ easier because they are revving a lot less.
97 TJ SE, 2.5L NV3550, NV241, HP30 w/ Nitro 4340 shafts, Currie RJ60, ARB, 35"s, TR bead locks, TOM WOOD drive shafts, Warn 9000i, Pollock with a skinny pedal behind the wheel!
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