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Ford F-250 Diesel Changes

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Quick question, am I right when I say that some of the 1994 7.3 diesels were "Powerstrokes" and some were simply a 7.3 with a factory turbo? What is the difference between the two designations?

Thanks
 
HEUI = "Human Energy Utilization Inatiative" Flintstone mobile? ;-)

I have no idea what HEUI is. Please help me out.
 
The 7.3 indirect injection was the standard rotary injector pump with external lines and injectors. The Powerstroke uses high pressure oil fired injectors.
AaronSEIA
 
The difference is that one is expensive to fix. The other one is more expensive to fix. Simple as that.
 
To more directly answer your question. '74 was change over year, the early ones were still the older indirect injection that used an injector pump and many if not all were turboed.

The later '74s were the newer Powerstroke direct injection. They did away with the injector pump and started using high pressure oil to drive the injectors and electronics to time and regulate the injection.
 
Yes and I have one of each. Early 94 turbo 7.3 is much easier and cheaper to work on. Both are mechancially injected and both have the same compression ratio. The IDI 7.3 is basically the same engine as the 6.9 with slightly bigger bore.

1994 Vin Code F is the IDI 7.3 turbo. 185 horse @ 3000 RPM and 360 lbs. torque @ 1400 RPM.

1994 Vin Code K is the DI Powerstroke 7.3. 190 horse @ 3000 RPM and 395 lbs. torque @ 1400 RPM.
 
What I meant to say (write) is both IDI 7.3s are mechancially injected, not the Powerstroke 7.3 even though Ford used that terminolgy when the Powerstroke was first sold (basically a Navistar T444E). I shifted the specs and VIN codes around.

Early to mid 1994 had two IDI 7.3s. NA and turbo.

Naturally aspirated 7.3 1994 VIN code F - 185 horse @ 3000 RPM and 360 lbs. torque @ 1400 RPM.

ATS type turbo 7.3 VIN code G - 190 horse @ 3000 RPM and 395 lbs. torque @ 1400 RPM.


The late 1994 Powerstroke was labelled VIN F with a 1995 year label, although sold in 1994. 17.5 to 1 compression. 210 horse @ 3000 RPM and 425 lbs. torque @ 2000 RPM.
 
I found a "94 on craigslist, and it doesn"t have the "Powerstroke" cowl over the radiator fan, so I"m assuming its the IDI turbo.

It looks like there is a decent power difference between the "Strokes and the IDI turbos. I"d prefer a bit more power.

Thanks for the specs.

Hey jdemaris, how different are those two trucks? Mileage and towing ability similar or is there a definite drop between the two?

Thanks everybody
 
No difference in fuel mileage and not a huge difference in pulling power either.

Big difference is some of the power-train upgrades. Powerstroke has some HD upgrades to the trans, torque converter, mounts, etc. if an E40D.

But, even if it's NOT a Powerstroke, the IDI trans may have been upgraded by now, and can be just about as strong.

For an older truck, I prefer the IDI. Much cheaper to buy parts for and easier to work on.
That being said, I'd have to say the Powerstroke is a slightly better-built rig. If I had my choice of either truck new, I'd take the Powerstroke. But used? I'd take the IDI version.
Cheaper to maintain.

I can buy a brand new injector for the IDI for $25. New, not rebuilt. Same for the Powerstroke - $200 for one injector. Similar price differences on some other parts.
 
I just want to make it clear, I'm talking about a turbo IDI 7.3 compared to the Powerstroke.

With a non-turbo 7.3 against a Powerstroke - they're not even close.

I'll add that my 92 Dodge Cummins with 3.50 axles easily outpulls both my Fords - even though they both have 4.10 axles. And, it gets 2-3 better MPG while doing it. But, the Fords are still very good trucks.
 
the idi was a much easier engine to work on and had less problems. not quite as much power but that is easy to fix with an allen wrench. The two powerstroke 1 tons I have i converted to a cummins. the 3 idi trucks i have still have the idi in them. That should tell you how well I like the powerjoke. I mean powerstroke.
 
I get 12 to 14 pulling a flatbed gooseneck loaded with 4 round bales, get about the same pulling a 2 horse gooseneck trailer. Never really checked it empty, but I'd say 16 or 17 if I drove it nice. 94 350 duals, 5 spd, Powerstroke, 4.10 rearend. An automatic might do 1 or 2 mpg better, they had a better OD gear.
Aaron
SEIA
 
Best I've ever gotten empty is 16 MPG, but 14-15 MPG is more the usual with my two 7.3s. My old 6.9 is worse, but it only has a C6 with no OD. I always figured a standard shift would do better, but I've never had one in a Ford. And, with the Dodge-Cummins, I've never had one with automatic - just the Gertrag five-speed.

Both my 7.3s get 11-12 MPG when pulling a moderate sized trailer. That's not too bad. My only gripe with my Fords is the empty mileage. Seems when I drive somewhere just to pick up two sheets of plywood, I ought to get 20 MPG instead of 14-16 MPG. I'll add though that all my trucks are 4WD and extended cab with full length boxes. I assume a standard cab, 2WD would do better.

I've got an 82 Chevy K10 with a 6.2 diesel and four-speed manual overdrive along with 3.08 axles. Absolutely useless for towing, but . . it gets 23-24 MPG on the highway with a light load.

I guess no truck is perfect for everything.
 
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