Ford 7.3L Gas Engine

[ovrszd]

I drive a 2015 with the 2.7. Very impressed. I wonder when the manufacturers will start putting these types of motors in the 3/4 tons and up over the bigger cubic inch gas motors?

Us heavy truck guys hope never.

 

[deerefan]

Us heavy truck guys hope never.

Out of curiosity, why? Not being argumentative, just wondering*

 

[ovrszd]

Out of curiosity, why? Not being argumentative, just wondering��*

You think a 2.7L has 250K miles of trailer towing in it's life?

Well,,,, does a 2.7L have 250K miles in it's life regardless what it's moving?

 

[ruffdog]

Out of curiosity, why? Not being argumentative, just wondering��*

How much of the time do you think the 2.7 would be on boost while towing? Would it live long operating like that?

 

[nikerret]

I drive a 2015 with the 2.7. Very impressed. I wonder when the manufacturers will start putting these types of motors in the 3/4 tons and up over the bigger cubic inch gas motors?

When they want to replace engines every year. The only way for this to make sense is for the type of people who buy a heavy duty pickup to get groceries.

I regularly tow around 15k on a gas 6.2L. Up big hills or into a windy day (30+ MPH headwinds aren’t uncommon), it will run in fourth or fifth gear, at higher RPM. This is not a problem with the engine designed for doing that all day long. It also has the torque to move it; over and over and over...

I understand the rated numbers for the 2.7 Ecoboost aren’t crazy lower than the 6.2L, but you are also comparing drivetrain loss from the light duty F-150 stuff, which generally loses 15-20% on the way to the wheels. With the heavy duty parts of an F-250 or moreso, the F-350 (including dually), you lose as much as 30-40%.

 

[deerefan]

How much of the time do you think the 2.7 would be on boost while towing? Would it live long operating like that?

I am not sure. Has any research been done to see? I can google it I guess*

 

[aczlan]

I am not sure. Has any research been done to see? I can google it I guess*

I would imagine that it's not built any lighter than the 3.5L EcoBoost is, and they put a lot of miles on the original version of that that they did the test series on.

Aaron Z

 

[goeduck]

duplicate

 

[goeduck]

I am not sure. Has any research been done to see? I can google it I guess��*

If you are curious, google why Ford went to the larger displacement 7.3 gas engine for the heavier trucks. They certainly could have gone with a smaller engine and boosted the snot out of it, but they did not. The smaller boosted engines make much more sense in the F150 class of trucks and below.

Ford Keeps It Old-School with the All-New 7.3-Liter Gas V8

Why Ford Made a New 7.3-Liter Gas Pushrod V8 in 219

 

[dodge man]

Keep in mind weight is a huge factor in automotive design. Comparing a 2.7 eco boost to a heavy hauler is hard to do. 500 pounds of engine weight is a big number for a truck that is rated at 7000 lbs vs one rated t 80,000 lbs.

 

[ovrszd]

I am not sure. Has any research been done to see? I can google it I guess��*

Ballpark figure here,,,, what's the heaviest load you've moved with a 2.7L and for how long??

 

[deerefan]

Ballpark figure here,,,, what's the heaviest load you've moved with a 2.7L and for how long??

Nothing real heavy, only had the truck a couple months. The heaviest thing I own is my JD 5103, about 5k lbs with loaded tires. I did not think about a good point brought up here, which is the weight of the truck. My F150 is aluminum, about 4500lbs if I remember correctly.

 

[ovrszd]

Nothing real heavy, only had the truck a couple months. The heaviest thing I own is my JD 5103, about 5k lbs with loaded tires. I did not think about a good point brought up here, which is the weight of the truck. My F150 is aluminum, about 4500lbs if I remember correctly.

Hitch on to your trailer, load your tractor, go for a drive. Highway driving, hills, stops/starts in town. Drive 50 miles or so. When you get home you may have a better understanding of your truck's abilities, good and bad.

 

[deserteagle71]

Nothing real heavy, only had the truck a couple months. The heaviest thing I own is my JD 5103, about 5k lbs with loaded tires. I did not think about a good point brought up here, which is the weight of the truck. My F150 is aluminum, about 4500lbs if I remember correctly.

I think you need to run your truck across the scales and find out what it really weighs.

I too figured my F150 would run less than 5000 lbs. A couple weeks ago I was in Oregon when I drove by a public scale that was empty at the time so I decided to just drive across it and see what my REAL weight was. Result was in the photo below. This is a 2016 F150 Supercab with the 3.5 Ecoboost engine, 6.5' bed, two spare tires, a tonneau cover and about 3/4 tank of gas (36 gallon tank). I was not in the truck so I need to add 180 lbs to that. So when I go out boondocking and the Yamaha Kodiak ATV is in the bed, my "light" aluminum F150 is over 6000 lbs! Probably around 6500 lbs, in fact.

 

[ruffdog]

The 7.3 vs the old 6.2 on the dyno.........see the charts

Godzilla vs Dyno! This is How Much Power & Torque the 2 Ford Super Duty Tremor Produces! - YouTube

 

[sd455dan]

The 7.3 vs the old 6.2 on the dyno.........see the charts

Godzilla vs Dyno! This is How Much Power & Torque the 22 Ford Super Duty Tremor Produces! - YouTube

So doesn't Fords own diesel make about 500 ft lbs. more at the wheels?

Before tuning?

I hope their new 7.3 tune, once they get to that point, can bring up the torque numbers.

It is good that they were able to shift the torque curve lower in the RPM range than the 6.2, and from the articles posted the loaded fuel mileage may be a pretty substantial improvement over the 6.2.

 

[ovrszd]

It would be very, very hard to build a gasser that will match torque with the new diesels. Very hard.

 

[nikerret]

For those not wanting to watch the video:

2017 Ford 6.2L w/aftermarket intake and exhaust on 3.73 rear end:
335 HP
369.5 LB-FT

2020 Ford 7.3L on 4.30 rear end:
358 HP
407.3 LB-FT

See video for particulars. There are a lot of variables discussed.

 

[nikerret]

It would be very, very hard to build a gasser that will match torque with the new diesels. Very hard.

Well, it’s especially hard to build a naturally aspirated gas to compete with a turbo’d diesel. An Ecoboost 6.2L or 7.3L would be an absolute beast. Ford has decided it needs some dependable engines in the heavy duty truck line-up, so they went back to the lower cost to build and maintain naturally aspirated pushrod V8.

 

[ovrszd]

Well, it痴 especially hard to build a naturally aspirated gas to compete with a turbo壇 diesel. An Ecoboost 6.2L or 7.3L would be an absolute beast. Ford has decided it needs some dependable engines in the heavy duty truck line-up, so they went back to the lower cost to build and maintain naturally aspirated pushrod V8.

It was cheaper to design and build an entirely new platform rather than Ecoboost the existing 6.2L?

Maybe there were other concerns?