Ford 7.3L Gas Engine

[5030]

Just another fatter payment book

 

[ruffdog]

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.

Another variable is the 7.3 had bigger tires.

 

[RickB]

Guy here drove one today.
Viewing a thread - Test drove a 7.3 Super-donkey

 

[nikerret]

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

Maybe there were other concerns?

It’s not unlikely Ford started by Ecoboosting the 6.2L and found it would cost too much and/or there were reliability issues. I recently read the cost to build a pushrod is much lower than the cost to build a single overhead cam. Once their R&D is paid for, I wouldn’t be surprised to see the 7.3L be the only gas engine offered, in the Super Duty lines. Right now, they are still selling a lot of 6.2L’s. Many buyers are timid trying a new transmission and a new engine, in the same truck. I know our County maintenance is looking at getting the 6.2L over the 7.3L, For a few reasons, the main one being they don’t want to be a test dummy on too many things.

The other issue with taking a 6.2L and turbocharging it, is end consumer cost. The diesel is around $10,000 more than the current 6.2L. Moving from the 6.2L to the 7.3L costs less than $2,000. What would the Ecoboost 6.2L add? Aftermarket forced induction runs $5k-$10k, for a kit, not installed. Installation costs vary from $1,000 to $5,000.

In regard to aftermarket, let’s look at Roush. Roush has a kit with three year warranty, for the Gen 1 Raptors, which use a slightly higher performing 6.2L, built more for performance than longevity. Roush offers a kit for the current F-250’s. It costs around $15,000 and doesn’t touch the engine. I’m inclined to believe they tested it, on the Super Duty and found it didn’t make sense.

When I look at Ford and Roush deciding not to put forced induction on the 6.2L, in the capacity these trucks were designed for, I have to think it didn’t make financial sense or caused too many long term reliability issues. Otherwise, they would do it, if they could make money off of it.

 

[nikerret]

Another variable is the 7.3 had bigger tires.

Yes, it was one if many variables. This video did a good job of addressing them. I do with they had shared the mileage differences.

 

[dodge man]

I’m guessing there is a lot more drive line loss in heavier duty trucks. I’ve got a lightly modified 5.7 hemi in a Challenger that equaled what the 7.3 put down on the dyno and I know the 392 hemi exceeds that by quite a bit. I’m not sure how they got numbers at lower rpms since an automatic will normally just downshift at lower rpms if you go full throttle.

 

[ruffdog]

I’m guessing there is a lot more drive line loss in heavier duty trucks. I’ve got a lightly modified 5.7 hemi in a Challenger that equaled what the 7.3 put down on the dyno and I know the 392 hemi exceeds that by quite a bit. I’m not sure how they got numbers at lower rpms since an automatic will normally just downshift at lower rpms if you go full throttle.

We need the full charts that include the numbers at what rpm to compare. Many times the dyno operator has to find the sweet spot where it won't downshift if floored, then run the tests.

 

[Tractorable]

Test drive vids on the new 7.3L are starting to trickle in on YouTube. Love how that 10 speed transmission keeps it right where the power is.


2020 ford 7.3 gas 0-95 - YouTube

 

[XSKIER]

We need the full charts that include the numbers at what rpm to compare. Many times the dyno operator has to find the sweet spot where it won't downshift if floored, then run the tests.

I must be the only one aware that any modern vehicle transmission can be commanded to lock in 1 to 1 gear (maybe 7th gear on this 10 speed) as well as lock the torque converter clutch through the OBD2 port. Without the command you'd only get about a 500 rpm swing in each gear wide open on a 10 speed.

 

[dodge man]

I wondered if they didn’t have a way to hold the gear. In the video they showed the gear ratios they did the dyno pulls in and they weren’t 1 to 1.

 

[Grumpycat]

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?

Actually, "yes". Ford's 2.7EB is one of the sturdiest engines Ford has designed. Stronger than the 5.0 Coyote.

 

[goeduck]

Actually, "yes". Ford's 2.7EB is one of the sturdiest engines Ford has designed.

That is my unserstanding, Ford did not put a CGI block into the 2.7 eco without thought. CGI is what is in the 6.7 diesel block and the 7.3 gas. Built for strength.

 

[deerefan]

That is my unserstanding, Ford did not put a CGI block into the 2.7 eco without thought. CGI is what is in the 6.7 diesel block and the 7.3 gas. Built for strength.

I always thought it was pretty stout. I am old school in my thinking, did a ton of research before buying this truck. I was torn over the 5.0 or EB. So far I am pleased. The 2.7 is a tough motor in my opinion.

 

[ovrszd]

I always thought it was pretty stout. I am old school in my thinking, did a ton of research before buying this truck. I was torn over the 5.0 or EB. So far I am pleased. The 2.7 is a tough motor in my opinion.

To quote a line from Charlie's War, "We shall see".

 

[Motorboatin]

I don't trust the ecoboost in towing situations. My friend has had multiple issues with his 3.5 equipped F150 that now has 150K. Last October he had to limp all the way home from a grouse hunting trip. He stopped at a dealer on his way back and they told him they would have to order parts so he limped home. The trip took me 7 hours and him 12

My wife's car has tiny ecoboost in it and it's fine. Not a single issue for 80k miles so as a commuter I wouldn't hesitate to have one in my car but in a truck that is supposed to haul trailers forget it

 

[dalola]

This was an article published in Automotive Engineering magazine prior to the release of the then-new 2015 F150 with the new 2.7L EB. It's a nice overview of the basic design & spec's of the engine (for 2015), to see how clearly "overbuilt" the engine is.

Ford's new 2.7-L EcoBoost V6 designed for lighter aluminum F-15


It seems Ford took a similar path with the new 7.3, with clean-sheet engineering based on intended usage.

Ford 2 7.3-L V8

 

[deerefan]

This was an article published in Automotive Engineering magazine prior to the release of the then-new 2015 F150 with the new 2.7L EB. It's a nice overview of the basic design & spec's of the engine (for 2015), to see how clearly "overbuilt" the engine is.

Ford's new 2.7-L EcoBoost V6 designed for lighter aluminum F-15


It seems Ford took a similar path with the new 7.3, with clean-sheet engineering based on intended usage.

Ford 22 7.3-L V8

Good read. Thanks.

 

[ruffdog]

I would say Ford is going more "old school" than "clean-sheet engineering" with the 7.3 gasser.

 

[coobie]

Just another fatter payment book

Thats what makes to world go around.

 

[Tomtint]

I don't trust the ecoboost in towing situations. My friend has had multiple issues with his 3.5 equipped F150 that now has 150K. Last October he had to limp all the way home from a grouse hunting trip. He stopped at a dealer on his way back and they told him they would have to order parts so he limped home. The trip took me 7 hours and him 12

My wife's car has tiny ecoboost in it and it's fine. Not a single issue for 80k miles so as a commuter I wouldn't hesitate to have one in my car but in a truck that is supposed to haul trailers forget it

Good friend of mine is a Ford certified mechanic and services all of our local PD and Sheriffs vehicles. He said the problem with the 3.5 is when people baby them and try to squeeze all the mpg they can out of them. ..He said the turbos waste gates can end up getting stuck from non use and that then triggers all sorts of computer and emissions issues. .. They need to be driven hammer down on a regular basis. He has crusers that have 100k hard ..meathead ..miles on them and they run like a top. He also said thy need clean oil..clean clean oil. OEM says oil changes at 7500 miles....he does them every 3k.