Ford 7.3L GASSER rumor confirmed

Groover wrote:

ScottG wrote:
At best it would have half the torque of a modern diesel so no, not many would jump ship for one.

From what I have heard the 7.3 is being designed for torque and efficiency so I expect at least as much torque per liter as the 5.0. Just getting the same amount would give it 580lbf. That is about 70% as much torque. Plus, what would be the purpose of building a new engine for the Superduty and medium duty trucks that doesn't compete with the performance of the diesel? At least, for a significant portion of the customers.

It won't have 580 torque because in a truck engine it would be tuned for lower RPM torque at the cost of high end torque.
Just like the truck 6.4 Hemi is rated lower than the hot-rod version in the SRT.
I don't think they wouled make the new 7.3 to compete with thier own diesel. I think they would build it to compete with Ram's gasser and to a lesser degree, GM.
It's a niche market but it's growing all the time.

It is interesting the difference between the F350-450 ad F650/750 . In the 1980's, we had a few F750's with 429 engines. Always got questioned when I said 1986 Ford 429

Groover wrote:
From what I have heard the 7.3 is being designed for torque and efficiency ...

Ford jumped back into the Medium Duty (F650/750) truck market a few years ago. While the chassis is different for the Medium Duties, the F53 (Class A motorhomes) and F59 stripped chassis use almost identical engine and transmissions.

The Medium Duty world has been looking for a high hp/torque gasser chassis for local deliveries for several years. Diesel just does not have the operating cost advantage that it used to have with all of the emission controls. Ford has an advantage over other in these market segments because the powertrain is manufacture in house.

While the 6R140 transmission has proved bullet proof, an 8 or 10 speed would squeak out a bit more mileage.

This engine has been in the "real soon now" stage for almost 5 years ! The big debate always was how big was it going to be. The clear bet was larger than 7.0L.

The second "discussion" that has been going on, is similarities to the current 6.2l (2 valve, 3 valve, OHC, pushrod ?)

Third issue is fuel economy and hp/torque. The 6.2L never had "great" fuel economy, but most people would say it was better than the 6.8L V10.

#BringBackBigBlocks

Loved my 460 Ford and 454 Chevy long ago.

dodge guy wrote:


Nope, nothing here. And yes, just look around. Just on my last trip out west I noticed a lot more gasser 3/4ton trucks, where it used to be mostly diesels!

That is called Baader-Meinhof phenomenon. Basically it is your mind only seeing what you want it to see because you have bias towards it.

dodge guy wrote:
And yes modern gas motors are more complex, but they don’t break down. And yes the emissions junk is ruining the diesels reputation!

They don't break down? Really? No lifter issues, timing chain issues or anything? I think this is more seeing what you want to see or not seeing what you don't want to see. Every engine, diesel or gas, breaks down. Gas engines are not magically immune from this.

ShinerBock wrote:

dodge guy wrote:
Well it makes sense since so many people are jumping the diesel ship and going wit ha gasser! the diesels have just become to unreliable and to complex, which is what made them so valuable before.

I see you are still munching on those sour grapes. I would have to wager that people on both sides are jumping ship from what I have seen here and on the Ram forums.

Also you say complex as if today's chain driven, variable valve timing, cam phaser, variable displacement, variable ignition, direct injected, adjustable intake runner gas engines are elementary and can be worked on by anyone with a basic tool set. I think it is safe to say that all engines today have some components that require more knowledge and special tools than what you would not find in a typical vehicle owners garage. However, I bet you that more Cummins diesel owners are willing and able to work on their engine than most modern gasser owners.

Nope, nothing here. And yes, just look around. Just on my last trip out west I noticed a lot more gasser 3/4ton trucks, where it used to be mostly diesels!

And yes modern gas motors are more complex, but they don’t break down. And yes the emissions junk is ruining the diesels reputation!

From the get go...diesel has an advantage.

Both in BTU's per measure (gallon) and higher compression ratio (it all boils down to PSI on the piston top)

But, out of context most discussions like this...

Gotta take into account some of the many variables on the table...that is often left out of the discussion...

First, there is no way to make up for the higher BTU's per measure between diesel and gasoline. Period...


Often left off the discussion is that at any given speed (whether running empty with no cargo/other people/trailer/etc) it takes way less than the ICE's maximum ratings (both HP and Torque).

So a gasser can get lots and lots more MPG than older designs, with the higher BTU factored in or in consideration/allowance

Another is to pavement gearing ratio's vs HP/Torque/RPM curves for that ICE.

Throttle setting vs RPM will be way lower in both, as torque is both higher and had at a much lower RPM

Of course, there are other attributes to consider and too much for any single thread to cover

Groover wrote:

ScottG wrote:
At best it would have half the torque of a modern diesel so no, not many would jump ship for one.

From what I have heard the 7.3 is being designed for torque and efficiency so I expect at least as much torque per liter as the 5.0. Just getting the same amount would give it 580lbf. That is about 70% as much torque. Plus, what would be the purpose of building a new engine for the Superduty and medium duty trucks that doesn't compete with the performance of the diesel? At least, for a significant portion of the customers.

I seriously doubt this 7.3L would achieve the same torque per liter as a 5.0L. For one, you are taking power figures of half ton meant for a much lower duty cycle and applying that the HD/SD trucks with a higher duty cycle. A much higher heat load, different emissions certifications, and many other aspects will cause the engine outputs of these two duty cycles to be very different.

Groover wrote:

ScottG wrote:
At best it would have half the torque of a modern diesel so no, not many would jump ship for one.

From what I have heard the 7.3 is being designed for torque and efficiency so I expect at least as much torque per liter as the 5.0. Just getting the same amount would give it 580lbf. That is about 70% as much torque. Plus, what would be the purpose of building a new engine for the Superduty and medium duty trucks that doesn't compete with the performance of the diesel? At least, for a significant portion of the customers.

Or more like 60% of the torque and 70% of the fuel mileage of a diesel......