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Open Roads Forum > Fifth-Wheels

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usnret

Milledgeville Ga

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Posted: 04/14/12 08:44pm

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I try to stay between 60 & 65, bit sometimes I crepe a little higher. I slow back down to my target speed.

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BlackSilver

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Posted: 04/14/12 08:47pm

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I have LT tires on my camper, so no tire-speed limit.

The mileage "sweet spot" on my pickup is right about 63MPH. Below that and the Allison drops down to 5th gear. Above that the MPG drops off a cliff.

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beachram

Delaware

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Posted: 04/15/12 07:51am

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Usually 65mph, but I will speed up to get away from other vehicles. I have found that my 4" magnaflow exhaust discourages other drivers from sitting on the passenger side of my truck when I am getting up to cruising speed.

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hone eagle

essex ontario canada

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Posted: 04/15/12 07:56am

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60 -65 but if Iam getting passed by everybody by a wide margin I will speed up so as not to be 'a rock in a fast stream'
Not a comforable drive but better then being stubborn and a bigger hazard.

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Dennis Bham

Alabama

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Posted: 04/15/12 08:34am

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62 MPH when towing - My 2008 LMM Duramax's peak torque is 660 lb·ft @1600 RPM ... At 1600 RPM in 6th gear we travel at 62 MPH. When I set the cruse control at 62 MPH it rarely needs to downshift and gets my best manually measured towing fuel economy of 11.5 - 12.0 MPG.

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Devocamper

West Haven CT

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Posted: 04/15/12 08:46am

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65 is where I get my best mpg and also do not feel good about all that weight and mass getting out of control not in a rush when we are towing.Our tire are G's and i think rated for 75mph

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dirt38

usa

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Posted: 04/15/12 11:47am

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Depends whether the slides are in or out.

tomman58

Southeast Michigan

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Posted: 04/15/12 02:44pm

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Dennis Bham wrote:

Interesting what is the torque at 65.
Where do you get this info?

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sirdrakejr

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Posted: 04/15/12 03:14pm

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My Dodge CTD gets it's nest torque/HP at 1900/1950 RPM. With the setup I have that translates to about 68 MPH. When I towed and now that I carry a truck camper, I get about 12-13MPG at that RPM number. So I try to stay in that band to get the best the engine can offer. Actually the speed from about 65 MPH to 70 is within the narrow band that give me the best I am going to get.

Frank

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