Ford 7.3L Gas Engine

[aczlan]

I wonder how long that thing will last, 16 plus pounds of boost is getting up there for a gas engine.

If it's built like the Ecoboost, it's built heavier than a normal gas engine, more like a diesel engine, so the boost won't be a problem.

Aaron Z

 

[sd455dan]

I wonder how long that thing will last, 16 plus pounds of boost is getting up there for a gas engine.

yeah will be watching, I was more surprised by how high they were winding the engine 7900 RPM

Being an OHV architecture, that is Screaming

 

[goeduck]

If it's built like the Ecoboost, it's built heavier than a normal gas engine, more like a diesel engine, so the boost won't be a problem.

Aaron Z

From what I read it is built even heavier.

 

[Randy Gann]

I have a 99 F250 with 7.3 Powerstroke I purchased used in 2001 with 50,000 miles . Now 20 years later it has 145,000 miles with no major issues. I tow a 35 foot fifth wheel camper around 10,000 lbs. My wife and I have discussed getting a newer truck in a couple years. . To get a quieter ride, improved technology features. A gasoline engine is certainly worth consideration in my situation.

 

[Grumpycat]

yeah will be watching, I was more surprised by how high they were winding the engine 7900 RPM

Being an OHV architecture, that is Screaming

Uh, "OHV"? Over Head Valve? Has anyone built an Under Head Valve in decades? Does even Briggs & Stratton still make an UHV engine?

Honda has made many pushrod engines with 10,500 RPM redlines.

RPM is mostly meaningless. The rate a shaft spins or piston reverses direction isn’t a primary indicator of what some would have you believe. The real issue is with piston speed. The faster the piston the greater the wear per inch the piston rings travel. So long stroke engines run slower but may have piston speeds comparable to supposedly “high stressed high RPM” engines.

 

[sd455dan]

Uh, å¾¹HV? Over Head Valve? Has anyone built an Under Head Valve in decades? Does even Briggs & Stratton still make an UHV engine?

Honda has made many pushrod engines with 10,500 RPM redlines.

RPM is mostly meaningless. The rate a shaft spins or piston reverses direction isn稚 a primary indicator of what some would have you believe. The real issue is with piston speed. The faster the piston the greater the wear per inch the piston rings travel. So long stroke engines run slower but may have piston speeds comparable to supposedly 塗igh stressed high RPM engines.

Common designations for over 60 years for most hotrodders

OHC or OHV It is More about Where the Camshaft(s) is/are located.

Ford has predominantly Gone after OHC engines for almost 3 decades, The Godzilla is somewhat of a departure for Ford 5.0 exempted.

I get where you are Going with this Flat heads. or AKA Valve In Block, Mmm VIB ?

edit-
Owned a couple sold my "green diamond" equipped straight 6 flathead DS 15 international Dump truck a while back.
It Got the "High output" engine, because of being a 1 1/2 truck- so equipped with the larger displacement engine which made a whopping 93 HP

 

[goeduck]

I loved those old flat head engines. :thumbsup:

 

[goeduck]

Well I convinced myself I need a new F250 or F350 within a year and I may wait until model year 2022 is out. So the 7.3 gasser - 6.7 oil burner decision has me going back and forth. Biggest thing I know I will be towing is 13K lbs.

 

[deserteagle71]

But how often will you be towing? If only occasionally, the gas engine is fine. If towing most of the time get the diesel - just a much more relaxed towing experience. 1000 lb-ft of torque taking you up the hill in overdrive with the engine turning less than 2000 rpm, and an exhaust brake to ease you down the other side. Not to mention the better fuel mileage. I have a gas V-10 that gets 12 mpg empty and 8 towing. I also have a Dodge/Cummins diesel that gets 18 mpg empty - and loaded with a big cabover camper and towing my Jeep on a trailer it still gets 14-15 mpg - a huge difference.

 

[goeduck]

I stopped by a Ford dealer and they said F350 build time is down to about 5 months. Anyone else hear that?

 

[void777]

Specs were just released on Fords new 7.3L gas motor, 430hp and 475lb/ft of torque. Cam in block push rod motor, forged crank, pistons/rods ready for boost, 4 bolt main bearing caps, cast iron block, built for durability, longevity, simplicity, and ease of maintenance. Makes 400lb/ft of torque at 1500rpm and will be mated to a beefed up 10 speed auto trans.

I like it, more power for towing than the 6.2L, and should last forever and be cheap and easy to maintain. I bet it’ll make a heck of a drag motor with a supercharger or a couple hair dryers bolted on.


We Finally Know the Ford Super Duty 7.3L V8 Power Numbers & They Are Lower Than We Thought! - YouTube

 

[Fladogman]

I'm getting 14.4 around town with my 7.3 and I have over 20k miles on it. I reset it every time I fuel up or when towing

My 2016 F350 diesel was getting 15.5 around town and diesel is more expensive so it's a wash in my book

This is the 7.3 gas engine? What gear ratio did you get in your differential?

 

[jyoutz]

Wonder what the gas mileage will be with it? I'm guessing maybe 15 hwy, 10 towing? If you gonna work the horses you got to feed them.

That’s why diesels still rule this type of application. The mpg drop off for towing is minimal compared to a gasser.

 

[Grumpycat]

That’s why diesels still rule this type of application. The mpg drop off for towing is minimal compared to a gasser.

Yeah, my Powerstroke only fell from 15 MPG at 70 MPH to 7.5 MPG with 20’ toy hauler. Could get 10-11 at 62 MPH or 18 MPG without the trailer.

I don’t find the boasts of diesel proponents to be as great as claimed. ULSD has often cost 50% more than 87 AKI. Engine held 15 quarts vs 6. Fuel+water filters were $70 or $150 installed every 20,000 miles.

Diesel has its place, but it is not practical for everything.

 

[Hay Dude]

Yeah, my Powerstroke only fell from 15 MPG at 70 MPH to 7.5 MPG with 20’ toy hauler. Could get 10-11 at 62 MPH or 18 MPG without the trailer.

I don’t find the boasts of diesel proponents to be as great as claimed. ULSD has often cost 50% more than 87 AKI. Engine held 15 quarts vs 6. Fuel+water filters were $70 or $150 installed every 20,000 miles.

Diesel has its place, but it is not practical for everything.

50% ?!?
Thats way more of a disparity than where I buy fuel its like 5-10%.
Powerstokes like to rev, so your fuel economy should drop with a trailer, but not that much.

 

[Grumpycat]

50% ?!?
Thats way more of a disparity than where I buy fuel its like 5-10%.
Powerstokes like to rev, so your fuel economy should drop with a trailer, but not that much.

At the moment $3.299 for ULSD, $2.899 for ULSD. But when I had a diesel was often forced to pay $3 when gasoline was hovering around $2.

2008 6.4L Powerstroke in tow/haul mode or not, the biggest difference was letting the engine spin going downhill. Shift at higher RPM. “Everyone” said, “That’s just the way it is. For fuel economy you need the old 150 HP 7.3L Powerstroke.”

 

[Hay Dude]

At the moment $3.299 for ULSD, $2.899 for ULSD. But when I had a diesel was often forced to pay $3 when gasoline was hovering around $2.

2008 6.4L Powerstroke in tow/haul mode or not, the biggest difference was letting the engine spin going downhill. Shift at higher RPM. “Everyone” said, “That’s just the way it is. For fuel economy you need the old 150 HP 7.3L Powerstroke.”

Oh geeze, I had 3 of those 6.4’s. Liked the truck, but didnt like the engine. Mine were big time fuel hogs.

 

[jyoutz]

Yeah, my Powerstroke only fell from 15 MPG at 70 MPH to 7.5 MPG with 20’ toy hauler. Could get 10-11 at 62 MPH or 18 MPG without the trailer.

I don’t find the boasts of diesel proponents to be as great as claimed. ULSD has often cost 50% more than 87 AKI. Engine held 15 quarts vs 6. Fuel+water filters were $70 or $150 installed every 20,000 miles.

Diesel has its place, but it is not practical for everything.

My Cummins only loses 2 mpg when towing a heavy trailer. But Cummins I-6 motors operate at much lower RPMs than a power stroke.

 

[nisaacs]

My Cummins only loses 2 mpg when towing a heavy trailer. But Cummins I-6 motors operate at much lower RPMs than a power stroke.

What do you consider heavy? All mine hauling 26k will get 10-12 on summer fuel and 18-20 empty.

 

[Farmer495]

Yeah, my Powerstroke only fell from 15 MPG at 70 MPH to 7.5 MPG with 20’ toy hauler. Could get 10-11 at 62 MPH or 18 MPG without the trailer.

I don’t find the boasts of diesel proponents to be as great as claimed. ULSD has often cost 50% more than 87 AKI. Engine held 15 quarts vs 6. Fuel+water filters were $70 or $150 installed every 20,000 miles.

Diesel has its place, but it is not practical for everything.

My old 7.3 6 speed manual was similar, biggest fuel suck pulling camper trailer was having to scream at 3000 RPM in 5th gear on every upslope on 70 MPH 4 lane. Idle up the same hills in 6th no trailer.