If U were spec'ng a truck for fuel mileage...
Discussion in 'Trucks [ Eighteen Wheelers ]' started by jagerbomber3.0, Sep 26, 2009.
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Did ya ever shift 3 times going backwards ? Dang i sure liked them 6X4 two stick setup
Displaced Yooper Thanks this. -
ampm wayne Thanks this.
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Saw the video on PP's website about the 389 glider kits with the pre emission Cat combo. Honestly, I would spec a forward lift axle for the tractor. My choice of truck would be a Pete 386 or Freightliner Columbia glider kit with a 13spd, 3:42 rear ratio, and a 12.7 Detroit 500HP, N14 Cummins Redtop, or 03 ISX.
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http://www.pittsburghpower.com/support/viewtopic.php?f=7&t=230&sid=cdb4c954b801063a52bec0a8ff956c81 -
I was thinking about that and how nice it would to be able to cruise at 70 mph and sit at 1300 rpm. Now what about when it came to climbing a good grade? I'm curious as to how far down you would have to drop gears. Now if I was an o/o I would not have a stock tune mine would be cranked way up but what if it was say a 475 c-15?
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Cummins told me, about my 04 ISX 450ST, that 1425rpm is the "sweet spot". On my truck, that's 62mph.russellkanning Thanks this. -
Then I would spec the truck with some higher gears and make sure its an aero truck and set it up so that 1425RPM is right in the 65-68 MPH range.
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