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Old 09-18-2014, 08:52 AM   #31
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Originally Posted by dbarr View Post
Being in the market to replace old (PSD) with new I searched out this thread. It appears that the general opinion is the 3.5L is more than capable to pull my approximately 5500lb loaded 233RBS. Being a bit old school, bigger is better for towing, I'm a bit worried that if I go with the 3.5 it won't pull the mountains in the west like a V8. I like the idea of the smaller engine but don't want to make an expensive mistake. Who's pulling heavier over 10000 ft mountain passes with the 3.5?


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This line of thinking is common. A big V8 HAS to have more power than a 3.5L 6 cylinder. FWIW, there isn't a V8 in production that will tow like the Ecoboost. Some of the V8's have higher torque and HP numbers, but they have to rev to almost double the RPM of the Ecoboost to produce that power. You take one of those naturally aspirated V8's to 10K elevation and you just lost a LOT of power. According to the calculator at wallace racing, a 400HP NA engine will lose 120HP at 10K feet. An EB is twin turbocharged- forced induction engines don't experience that loss in power.
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Old 09-18-2014, 09:08 AM   #32
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I can tell you first hand that the ecoboost is all that they say it is. I was a huge non-believer until a friend of mine purchased a 3008W FR. I have since purchased one and tow my 829fkss Flagstaff with no issues at all. Mine is a 2014 F150 supercrew with 3.73's and max tow ans E rated 10 ply tires. I did upgrade the tt to E rated 10 ply tires also.
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Old 09-18-2014, 10:42 AM   #33
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I can tell you first hand that the ecoboost is all that they say it is. I was a huge non-believer until a friend of mine purchased a 3008W FR. I have since purchased one and tow my 829fkss Flagstaff with no issues at all. Mine is a 2014 F150 supercrew with 3.73's and max tow ans E rated 10 ply tires. I did upgrade the tt to E rated 10 ply tires also.
I was somewhat skeptical as well. My parents bought one 2 years or so before I did. My step dad claimed it pulled as well as the 97 7.3L PSD he had did. I bought a 2013 and now pull a Puma 31-RDKS that weighs 7952 dry. I'm in the low 9K range loaded I estimate. My EB has the 3.55 gears. I pull in 5th at ~2100 RPM at 65 mph. It catches 4th for most hills and inclines. With 3.73 gears, the only difference I personally think I'd notice is that I'd hold 5th a little better on the inclines but would be turning a little higher RPM. I have pulled with 5 and 6 locked out and ran in 4th at 2800RPM and never had to catch a gear, even on pretty modest grades where truckers were having to pull over and struggle at 40mph. I had a 97 PSD, and tend to agree that the EB pulls every bit as good as it did. Mileage is lower- 8ish from 11ish. Anyone who knows anything about BTU content of fuel knows that you CAN'T get the same amount of power from gasoline as you do diesel, though.
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Old 09-22-2014, 12:42 PM   #34
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Yes it is a lot of weight. I have CAT scaled my rig and I am 100% within ALL ratings.

On my daily commute I can average 22 to 24MPG.

On a recent trip I was involved in a near accident and I was forced to perform an emergency stop from 60 MPH. I was able to stop without incident and safely. So to answer the usual nonsense about 'yes you can pull it, but can you stop it', yes I can and yes I did.
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Old 10-30-2014, 08:34 PM   #35
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I have a 2013 F150 with EB, 3.55, and the towing package rated at 9600 lbs. My camper is the Flagstaff 8528RKWS weighing just over 7700 from the factory. I've pulled mine 2000 miles into the coastal winds in Southeast Georgia, east Tennessee mountains, and just last week into the Virginia mountains. The truck ran comfortably at 70-72 mph in 5th and 6th gear, easily passing anything I wanted to on the roads. I've had a couple of hard braking situations without any issues, brake bias set at 10. I average 8.5-9.5 mpg on most trips. It eased over 10 with a good tail wind once.
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Old 10-30-2014, 09:32 PM   #36
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No issues at all with our EB and TT combo!
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