What are you guys getting out of this combo and do the little air deflector/wings on the top of the mid roof actually help when pulling a van
389 X15 13 speed fuel mileage
Discussion in 'Peterbilt Forum' started by Md420, Nov 11, 2019.
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What size tire, what gear ratio, which cummins X15, what area you running, how much weight and how big a gap between truck n trailer?
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280 frame, will be east coast/south east, 565hp 2050tq, 3.36 rears, 295/75R 22.5.
Say average weight of 33k in the box -
Upper 5’s Low 6’s if your lucky. That much of a gap Id skip the turbo wing.
Last edited: Nov 11, 2019
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If I were to back it down to about five to about 500hp would that help it
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Not really since its the performance series.
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Well ####.
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stillwurkin and Bakerman Thank this.
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Price of being cool. Hood + 80k lbs + 15L engine will never equal fuel economy. Buy a Volvo if you're chasing fuel mileage lol.
Bakerman and Roberts450 Thank this. -
AModelCat Thanks this.
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