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Gearing is an effective strategy if your engine has enough torque at the target RPM to push the car through the air at the desired speed.
This a no-brainer for diesels. They have mondo torque at low RPMs, but gas engines are highly resonant and that RPM may depress volumetric effiency to the point the engine simply cannot make enough torque, and she lugs excessively.
My engine will idle (650 RPM) down the road but I have a pretty big engine.
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2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
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