Re: Ford's Future Engine Story
I helped a family member retrieve a car from another city back to metro Detroit recently, a total of about 200 miles each way, and I was amazed at the fuel economy results I got with a brand new F-150 with the updated 3.5L and 10 speed.
Driving to pick up the car and tow dolly, we averaged 20.7mpg on the highway. Our speed averaged around 75mph.
Driving back with the car in tow on the dolly, we averaged 22.3mpg. Our speed averaged around 68mph.
Curiously though, the difference is not entirely due to speed. I did a lot of reset average checks at 65 and 70 mph, and in both cases, we saw improvements with car in tow of over 1mpg. Total weight behind the truck is about 3500lbs.
I think that aero is a big contributor here. The ole Nascar slipstream technique was most certainly in play, as the car was only about 3' behind the truck which have a terrible slipstream to begin with due to bed. So weight means squat, in highway FE. That is my conclusion. That is why shaving 500lbs with Aluminum did nothing to FE, relative to GM trucks. It was more about towing capacity, and perhaps a tiny impact on city FE.
So the fact that we got over 22mpg at 65mph quite easily while towing that much weight, also shows the impact that 10 speeds can have when combine with 470ftlbs of torque. The low torque average was right at the sweet spot, as the truck barely knew it was towing anything. I would tip in slightly, and speed climbed instantly.
Anyway, just one little use case study I thought I would share.
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