Eco Boost
Tuned
Joined: Feb 2004
Posts: 483
Likes: 55
Hotshot
Joined: Oct 2006
Posts: 10,173
Likes: 8,038
From: Texas
They (FoMoCo) would have to re-name it the EGO BOOST!!!!!!!!!!!! LOL
Logistics Pro
Joined: Dec 2003
Posts: 3,779
Likes: 873
From: Foothills of NC
As I see it, the main problem with an EcoBoost in a Super Duty is how they are used. Many government and company trucks are idled for long periods, and/or just driven around the town limits. There is plenty of evidence of cylinder wash down and oil contamination with direct injection if the engine is not worked hard or long enough. I can only imagine the short engine life of a large displacement direct injection engine idling for hours on end and never leaving the town limits.
Senior User
Joined: Jul 2018
Posts: 137
Likes: 0
There are several reasons:
1) They would need to engineer an iron block version. Every HD truck engine has been iron for durability. The Ecoboosts are almost all aluminum.
2) Thermal management. Blowers produce a lot of heat. Fine when you're towing 13,000 or less, but the Super Duty is engineered for a whole different level of work. There's no reason to go to the expense and complexity of the required cooling system because.....
3) Most importantly, there's no pressure. The government and CAFE don't regulate HD fuel economy, but do for half tons. That is the reason the Ecoboost exists in the first place. It's the reason the 7.3L will never be in the F150. If the laws changed and HD trucks needed to meet fuel economy standards, you can bet on seeing a downsized engine in the Super Duty. Until then, the simplicity of a large naturally aspirated port injected iron block V8 will win out every time.
1) They would need to engineer an iron block version. Every HD truck engine has been iron for durability. The Ecoboosts are almost all aluminum.
2) Thermal management. Blowers produce a lot of heat. Fine when you're towing 13,000 or less, but the Super Duty is engineered for a whole different level of work. There's no reason to go to the expense and complexity of the required cooling system because.....
3) Most importantly, there's no pressure. The government and CAFE don't regulate HD fuel economy, but do for half tons. That is the reason the Ecoboost exists in the first place. It's the reason the 7.3L will never be in the F150. If the laws changed and HD trucks needed to meet fuel economy standards, you can bet on seeing a downsized engine in the Super Duty. Until then, the simplicity of a large naturally aspirated port injected iron block V8 will win out every time.
Mountain Pass
Joined: Oct 2018
Posts: 199
Likes: 5
I think OP is looking as to why there isn't a boosted V8 - or that's my take on it. Having owned both types now my unloaded MPG in Ecoboost was ~17mpg and in 6.7 is ~15mpg. Towing our camper (7500lbs) was around 9mpg. Not sure what the F350 will do but we will find out Friday
Fuel capacity sucked at 26 gallons in the Ecoboost especially towing, 48 gallon upgrade was NICE!
Fuel capacity sucked at 26 gallons in the Ecoboost especially towing, 48 gallon upgrade was NICE!
Cargo Master
Joined: Feb 2005
Posts: 2,898
Likes: 185
EcoBoost is an awesome engine. Hoever, I suspect its unloaded fuel economy in that heavier truck would be no better than the 6.2L V8. I always say that it's Eco OR Boost, not both. There are F150 owners who report better towing mileage with the 5.0L V8 then the EcoBoost.
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Hotshot
Joined: Oct 2006
Posts: 10,173
Likes: 8,038
From: Texas
Also, with current technology, big cubes and boost = lots of gas under big load. Unloaded one might be just “OK” on fuel. In days gone by, the old 534 SuperDuty Ford and the 549 IH just about got gallons per mile when at work, but they were workhorses.
Laughing Gas
Joined: Oct 2012
Posts: 1,219
Likes: 5
Expect 10-12mpg. Thats what I saw towing my 6500lb camper all summer with my 6.7. The difference for me was my prior tow vehicle 2008 tacoma got its lunch handed to it towing the camper and the F350 6.7 didn't know I hooked anything up to it. I went from stressed towing to not knowing the camper was behind me. Have a fun safe tow.
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