Ford 7.3L Gas Engine

[goeduck]

They are better at producing torque and more reliable. Seems like a win-win for truck owners

Do not forget push rod engines are more compact. Translates to more room in the engine bay or more room for additional displacement, accessories, etc.

 

[Motorboatin]

I'd be curious to know how pushrods contribute torque.

Reliability? Depends on what other parts you include in the picture. I'd be inclined to say it's a draw.

Pushrod engines typically have two valves and big valves with large ports move lots of air which = torque

Fewer parts will always be more reliable. Simple is better at lasting longer

 

[Motorboatin]

An OHC engine can be designed to the same thing.

And cost more in the process

 

[goeduck]

From the car and driver article... what is Fords logic in doing this?

A slightly less powerful version of the new 7.3, rated at 350 horsepower at 3900 rpm and 468 lb-ft of torque at 3900 rpm, will be standard on the F-450 chassis cab, the F-550, the new F-600, F-650 and F-750 Medium Duty trucks, and F-53 and F-59 stripped-chassis models.

 

[ning]

From the car and driver article... what is Fords logic in doing this?

A slightly less powerful version of the new 7.3, rated at 350 horsepower at 3900 rpm and 468 lb-ft of torque at 3900 rpm, will be standard on the F-450 chassis cab, the F-550, the new F-600, F-650 and F-750 Medium Duty trucks, and F-53 and F-59 stripped-chassis models.

Derated for continuous (heavy) duty rating.

 

[NPurdy1112]

Woah I was late to this thread. Was not expecting a full 8 pages already. I will be interested in the tow/haul numbers!

 

[nikerret]

Derated for continuous (heavy) duty rating.

It’s probably the same engine and tune, in the gasoline engines. For example, the same was done with the 6.2L. All that was done was measuring at different RPM’s (commercial vehicles are rated based on where the sound reaches a certain level), instead of peak power and torque.

The diesel chassis cabs are de-rated, but also use a different turbo and some other parts.

 

[nikerret]

Go look at the day I graph, from the first page. At 3,900 RPM, it’s the exact same in the regular engine as the commercial numbers. They just don’t list maximum/peak, on chassis cabs.

 

[Fallon]

From the car and driver article... what is Fords logic in doing this?

A slightly less powerful version of the new 7.3, rated at 350 horsepower at 3900 rpm and 468 lb-ft of torque at 3900 rpm, will be standard on the F-450 chassis cab, the F-550, the new F-600, F-650 and F-750 Medium Duty trucks, and F-53 and F-59 stripped-chassis models.

It's not a Ford thing. All the big 3 do it for CnC rigs vs pickups. Consensus I've seen is for increased durability. Really the same reason teactor engines are underpowered for their size. Lasts longer & will easily go all day for years on end when you cant push the engine hard compared to a more tuned engine. Most automotive engines would blow up or melt down if pushed hard for significant durations. Fine for short demands like merging. Less fine for commercial duty stuff flogging it all day.

 

[goeduck]

It's not a Ford thing. All the big 3 do it for CnC rigs vs pickups. Consensus I've seen is for increased durability. Really the same reason teactor engines are underpowered for their size. Lasts longer & will easily go all day for years on end when you cant push the engine hard compared to a more tuned engine. Most automotive engines would blow up or melt down if pushed hard for significant durations. Fine for short demands like merging. Less fine for commercial duty stuff flogging it all day.

Got it. Kinda like my old Mercedes 240D. 67 HP was not enough to stress anything out. :thumbsup:

Or get up to the highway speed limit. :shocked: