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Old 02-01-2006, 07:45 PM   #15
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Sure, it's the sweet spot, but...

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Originally Posted by Silvertwinkie
I think a lot of us have done it.

After a few years of towing the Airstream, I found that about 62 is the sweet spot for my rig. Not fast enough to totally turn MPG (miles per gallon) to GPM (gallons per mile), but also not slow enough to take a lot more time to get to the destination.

Sweet spot... but how fast do you CHOOSE to go? Do you stick with the sweet?

From Evanston,


Tom
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Old 02-01-2006, 07:46 PM   #16
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Where are the guys with the Jaguar S Type?

My first year on the Forum I had a nice correspondence going with a guy who was pulling a 34 foot classic with a Jaguar S Type Sedan... I wonder how fast he goes with that...


Tom
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Old 02-01-2006, 08:03 PM   #17
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Talking

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Originally Posted by PWRSTRK
My first year on the Forum I had a nice correspondence going with a guy who was pulling a 34 foot classic with a Jaguar S Type Sedan... I wonder how fast he goes with that...


Tom
I think I saw him in his rig blow by this sign earlier...:

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Old 02-01-2006, 09:52 PM   #18
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I did extensive testing on this all summer long. The most comfortable speed was around 62, but mileage increased a great deal by dropping down to 55. I've been over 14, even with the 8.1 litre motor in the Silverado. For people that don't tow that often, it might not be worth it to drop down to 55. But when you're full-timing on a fixed income, and see gas for over $3 a gallon, it seems like an acceptable trade-off.
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Old 02-02-2006, 10:25 AM   #19
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Just currious for you 3/4 ton guys, do you ever tow with your cruise control engaged? I was told I could use the cruise on my F-250 diesel when I bought it last year if I engaged the tow/command but was recommended not to tow in overdrive.

I am still waiting for the 30' Safari SE to be introduced so I don't have an AS yet so I haven't had any experience towing anything with my F-250 yet. I'd like to be able to use the cruise so my speed doesn't creep up and down alot, but I wasn't sure it would be a good idea even though my towing where I'd be using cruise would be on southeastern interstates (mostly GA, AL, FL, SC, and some TN) where hills are mild and not too many mountains.
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Old 02-02-2006, 10:45 AM   #20
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Quote:
Originally Posted by Minnie's Mate
Just currious for you 3/4 ton guys, do you ever tow with your cruise control engaged? I was told I could use the cruise on my F-250 diesel when I bought it last year if I engaged the tow/command but was recommended not to tow in overdrive.
I have but only in dead flat areas. With tow/haul engaged, cruise control is a little too agressive and tends to cause the tranny to hunt when I'm in OD.
According to my manual OD towing is ok unless I get excessive hunting.

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Old 02-02-2006, 11:08 AM   #21
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Originally Posted by jcanavera
I have but only in dead flat areas. With tow/haul engaged, cruise control is a little too agressive and tends to cause the tranny to hunt when I'm in OD.
According to my manual OD towing is ok unless I get excessive hunting.

Jack
My tow/haul button is located on the end of my gear lever. This is where my F-150's and my wife's Expedition's O/D on/off button is located. I think when you engage the tow/haul it automatically disengages the O/D. Correct me if I am wrong somebody. I just assumed the dealer meant not to tow without the tow/haul engaged.
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Old 02-02-2006, 11:10 AM   #22
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That may be the case in Ford products. GM allows it to be used.

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Old 02-02-2006, 11:52 AM   #23
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hellow m' mate and others

tried using the cruise control on the 05 250psd while towing.

as jack reports, except for really flat areas with no head wind, i didn't like it.....seemed to use more fuel and did shift sooner and with more throttle than i would have. also doesn't let the rig sail as much in a tail wind or decline...

once up to speed much of the trailer control is via throttle.

yes it's possilble to tow above the speed limit with the 250.....but the drift is so gradual that c.control isn't really needed....the 34 provides enough mass to modulate rabbit like accelerations.

i tend to drive the truck, especially while towing by the tach....

you are gonna love it when finally used for towing.......the ride improves and the brake controller is sublime....

one of the issues with higher speeds is of course the tires are only rated to 65mph.

it's easy to drift upward of 75/80 and once there, the eye becomes used to the movement at that speed, and that is what makes it so hard to get back down to 65.......just like when first driving on secondary roads after a long stretch of interstate.....in any vehicle.

cheers
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Old 02-02-2006, 12:31 PM   #24
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TV Motor Sweet spot....

Hi all -

Been busy for a while. Got a nice note from the Forum site that said I should post again - here I am.

Read the thread with interest as I think that the right towing speed question has more to do with the Motor's sweet spot than with the trailer. Naturally, the trailer dictates the situation (not too fast with a poorly pulling trailer!!!) but it seems like my 'Burb has a engine sweet spot at about 2400rpm. There is power there - no lag or lugging - but the mileage is still OK. I pull a 34' with the 6L.

Someone else (several actually) mentioned that a certain speed was 'just right' but terraign, tranny gear and motor all affect that 'just right' spot - Oh, and trailer size, and weight too.

Never easy is it!?

Ciao

Axel
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