The only way to change the rpm in any given gear/speed is changing the rear end gear ratio, the internal gear ratios of the tranny and/or changing the overall diameter of your rear tires. A tune will not change the rpms of a given speed in any gear.
Matthew 26:52-54 / Go Pack Go!
1987 Mustang GT Hatchback - 2V Mod Swap In The Works
1997 Lincoln Town Car, PI Intake/Cams, Sofa-On-Wheels, "Fat Tony" we call it
2001 GT Convertible - D1SC / Geared / Cammed / 440wh 400wt - TOTALED 2/2019