MPG poor pulling sled trailer

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Jan 30, 2008 | 09:54 AM

#16

johnh

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Joined: Nov 2002

Posts: 4,053

Likes: 29

From: lyman, utah

Quote:

Originally Posted by nvr-enuf

Thanks guys for your advice.

Regarding the tires, they had quite a belly in them but did check out at 44 psi. We are running car tires on the trailer, 205 / 75 / 15 from memory. I know we "should" be running trailer tires, but it ended up being a $$$$ thing. Maybe the tires should be cranked up to 55 psi as well as closing off the front grill

THanks for all the responses.

Scott

do not put more than the maximum recommended air pressure in the tires, they will blow,.... a Friend had some car tires on his trailer and they blew out because of over inflation.
he had to haul a pretty heavy load so he added more air thinking the tires would handle it

Jan 30, 2008 | 10:21 AM

#17

SundayMoney

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Joined: Mar 2007

Posts: 585

Likes: 0

Quote:

Originally Posted by nvr-enuf

Driver details - used the cruise, set at an actual 70 to 72 mph, the tach read 1950 rpm to 2000 rpm.

There is the problem. Towing a tall trailer,with a truck shaped like a brick.

Wind drag is doubled from 55-70mph. The rate wind drag increases is exponential,not linear. Wind drag increases in a HURRY.

Another figure I've come across is that you lose 2% of your fuel economy for every MPH above 55 that you drive.

Drop 'er down a few mph next time and see what happens.

Jan 30, 2008 | 10:51 AM

#18

Rednecktastic

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Joined: Aug 2007

Posts: 1,629

Likes: 0

From: Republic of Texas

Quote:

Originally Posted by mopardamo

Hello,

I think the lack of a bed coupled with the size of the trailer is a drawback. The flat bed is hurting you to get the air up and around the trailer.

Damon

Never thought of that, sounds like something to think about.