3.42 gear ratio

Espressolane · Sep 2, 2018

Maybe you should consider what trailer you want as well.
You have a wide choice of manufacturers, types, configurations. Lots to consider.

sangtito · Feb 4, 2019

Zeviander said: ↑

Flat deck at 80k+ means long wheelbase, smaller sleeper, higher ratios. Aero cabs usually aren't spec'd to handle the stress of all-80k all the time. Nor are they built to last like a Paccar, Starcar or Mack would be.

Longer wheelbase and smaller sleeper because you will likely be able to overhang the front of your trailer more and wanting to save weight for bigger payload (if you can't tare out closer to 30,000, you might miss out on some loads).

Higher ratios aren't necessary but they will help you get up bigger hills faster and the less time you spend on the hill, the less fuel you use to get up it. If all you do is run the Dakotas to Texas, you would gain benefit from a lower ratio, but once you go east of the Mississippi, the hills will kill your fuel economy.

Don't buy a van puller and expect it to do well in flat deck. Spend the little bit extra and find something built to pull a skateboard.
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So, with the high ratio set up is it gonna be fuel economist on the flat land? and is there any best formula for 500hp with 13 speed to save fuel?

HillbillyDeluxeTruck · Feb 5, 2019

sangtito said: ↑

So, with the high ratio set up is it gonna be fuel economist on the flat land? and is there any best formula for 500hp with 13 speed to save fuel?
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Keep your right foot off the go pedal. Its flatbed. My ISX gets 6mpg @ 76-80k. Ive got 3.55's on 22.5 lopros, in an aero truck with a midroof sleeper. I run 1400rpm @ 65ish mph.

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