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Open Roads Forum  >  Tow Vehicles

 > Ford 7.3 v8

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fla-gypsy

North Florida

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Posted: 09/04/20 06:18pm Link  |  Quote  |  Print  |  Notify Moderator

I’ve been cruising in my 2009 V-10 for 11 years and it’s a great engine. The 7.3 should be better in every category.


This member is not responsible for opinions that are inaccurate due to faulty information provided by the original poster. Use them at your own discretion.

09 SuperDuty Crew Cab 6.8L/4.10(The Black Pearl)
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PatJ

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Posted: 09/06/20 09:19pm Link  |  Quote  |  Print  |  Notify Moderator

I am not brand loyal, I currently have a 2019 V10 class C I love. For years my daily driver was a 4.6 Crown Vic which was probably the best car I've ever owned. For the last 10 years my daily driver is a 5.3 Tahoe which has been fantastic, and one of my many Chevy LS.
Again, not brand loyal.

I remember when Ford came out with the "modular" V8/V10 their ads basically said how only a stupid cave man would stoop as low as to drive something as crappy as a prehistoric push rod engine. As I recall the ads compared the LS to the WWII jeep or a lawn mower due to the pushrods, while their modular had the super high-tech OHC (and in Lincoln, DOHC.) Here we are in 2020 and as I understand it the Ford 7.3 is a single cam pushrod motor. I'm sure its great. But its kind of funny. I can see why people are saying Ford copied the LS. The LS is an amazing engine I don't blame Ford for trying to duplicate its power/weight/cost ratio as well as its long life.


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BenK

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Posted: 09/06/20 10:34pm Link  |  Quote  |  Print  |  Notify Moderator

Curious...anyone know if this big block gasser’s casting was based on the old 7.3L diesel ?

That would have been a consideration if I was going to build a new gasoline big block...


-Ben Picture of my rig
1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
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RobertRyan

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Posted: 09/06/20 11:22pm Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

You all realize that the RV versions of this 7.3 drivetrain will not be appreciably better than the outgoing V10, right.
It’s disappointing that the chassis models get old technology and less power.

Less GVWR and GCVWR in the case of Winnebago Gas Motorhomes, which is surprising for a larger engine.

rjstractor

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Posted: 09/07/20 09:12am Link  |  Quote  |  Print  |  Notify Moderator

BenK wrote:

Curious...anyone know if this big block gasser’s casting was based on the old 7.3L diesel ?

That would have been a consideration if I was going to build a new gasoline big block...


I would say that's extremely unlikely, since the 7.3 diesel was not a Ford engine. It was a Navistar engine adapted for use in Ford trucks, not unlike the Cummins in the Ram. The displacement number may or may not be a coincidence.

rjstractor

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Posted: 09/07/20 09:21am Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

You all realize that the RV versions of this 7.3 drivetrain will not be appreciably better than the outgoing V10, right.
It’s disappointing that the chassis models get old technology and less power.


IIRC the lower power rating is due to the way engine power is certified (bench dyno vs chassis dyno or something like that) in commercial vehicles vs pickups. The F550 also is rated at 350 hp instead of the 430 in the 250/350. I believe the actual engine output is the same. Someone much smarter than me (maybe Shinerbock) could explain it much better. It's too bad the motorhome only gets a six speed trans though.

Grit dog

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Posted: 09/07/20 01:35pm Link  |  Quote  |  Print  |  Notify Moderator

^ Interesting. I wonder as well now


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blt2ski

Kirkland, Wa

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Posted: 09/07/20 02:38pm Link  |  Quote  |  Print  |  Notify Moderator

rjstractor wrote:

BenK wrote:

Curious...anyone know if this big block gasser’s casting was based on the old 7.3L diesel ?

That would have been a consideration if I was going to build a new gasoline big block...


I would say that's extremely unlikely, since the 7.3 diesel was not a Ford engine. It was a Navistar engine adapted for use in Ford trucks, not unlike the Cummins in the Ram. The displacement number may or may not be a coincidence.


I doubt it. BUT with that said, the gas versions of that block IHC made were good motors. In someways better than diesel ones. Rumour had it tho, the 6.9 version liked to break crankshafts do to torque of the motor. Diesel motors did not have that issue.
These are the IDI versions. The T444e/7.3 psd was a different animal test.
I would go with coinsidence over planned.

Marty


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Weldon

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Posted: 09/07/20 05:42pm Link  |  Quote  |  Print  |  Notify Moderator

I drove a new one recently. Mileage when I started the trip was 7.4 the truck only had 23 miles on it. 250 miles later of highway driving it had climbed ti 11.6 mpg. I was not really impressed with the truck. Perhaps another trip would be better.

Lynnmor

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Posted: 09/08/20 08:18am Link  |  Quote  |  Print  |  Notify Moderator

Weldon wrote:

I drove a new one recently. Mileage when I started the trip was 7.4 the truck only had 23 miles on it. 250 miles later of highway driving it had climbed ti 11.6 mpg. I was not really impressed with the truck. Perhaps another trip would be better.


Apparently you don't zero the mileage meter.





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