Hey guys!
I pulled up 4 old post about fuel mileage, but still want new reviews. I'm looking to buy an older truck w/ cash. Either a FL century or an older 95-2000 long nose. I'm going to be yankin a 4 car trailer w/ it and I'm wondering if I would be able to pull anything better then 6mpg with such a light trailer/load.
I know I could pull at least 7 or 8mpg if I stead down to a single axle with a c-12 or such, but wondering if a light load 24/7 would make enough difference to average 7 or 8 w/ tandems, factoring in also the idle time.
What yall think?
Chop
Fuel Mileage for an older Pete
Discussion in 'Trucks [ Eighteen Wheelers ]' started by jesdispatch, Mar 14, 2010.
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series 60 non egr would be a good motor. look for 3.55 rears, rtx 9 , rtlo 13 my choice, will give good speed/rpm. rv roof mount ac with rv generator, no idle time,and not a lot of expense. i average 6.8 pulling a conestoga with this setup. in a volvo 610. free advice and worth every penny, johnny
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Thanks Johnny....I'll keep that inmind with the roof mount. BTW you have a twin running around virginia that goes by the name Ghost...........yall look like twins.
If you have any other input.....feel free
CHop -
I have 2000 Pete with 3406E engine 475 HP, super 10 trans 355 rears and I pull flatbed heavy loads mostly and I average 6.3 mil/gal I do use my cruise control @65 miles.
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I've been looking at an older Century..... All I been finding are 10 spds w/ either 3.90s, 3.55's or 2.79s. I was just wondering if anyone out there actually pays attention closely to fuel mileage like this. I would assume a 60 series w/ 10spd and 2.79s would do ok. I usually don't run faster then 65, unless I'm out west.
I'd really love to hear that I could get me a long nose and get 7mpg hauling such light loads, but its looking more like 6-6.5 for a peter car. -
I wouldn't go below about 3.55 w/Detroit w/ 10 spd. And out west you will be real slow in mountains w/2.79 3.36s. Older 60 series run best around 15-1600 rpms.
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Big Duker,
Even with pulling such light loads all the time, you thing below 3.55 wouldn't be enough?? -
I have never checked my milage hauling our race truck on the hiboy but it's good
I run a 3406C 15over with 3.70s but those gears are for when the truck works
If it was playing all the time 2.64s and a 13 or 18 so you can always be in the sweet spot . If you are making lots of miles an electronic engine will proll serve you better -
I will be averaging 3,000 - 3,500 miles a week. Mainly would be running Texas to New Jersey area or Md/Va, then either out to CA or just straight back to Texas. FL's seem the way to go price wise, but the only ones I've seen in decent shape have had 2.79's in them w/ 60 series and 10 spds. Was thinking since I'd only be pulling about 27k total at any given time that it would justify having the deeper rear w only 10 gears. I know most single axles are getting anywhere from 7-12 depending on setup, but was hoping to push a tandem sleeper into the area of 7mpg if I could.
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Most of the tall geared trucks also run direct transmissions Roadranger has a ratio page that has a calculator , I don't have the link on this comp.

And with those kind of loads the tall gears shouldn't be aproblem in the hills, on the pavement we run 3.70 -3.55s at 63500KG(x2.2 for pounds) gross with od transmissions
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