Ford's 7.3 gasser specs released

"MasterMario - Keeper of the V8s" (mastermario)
08/01/2019 at 08:38 • Filed to: Ford

430HP @ 5000RPM and 475 FTLBS @ 4000RPM

Not bad.

Hopefully being a ground up design it also gets pretty good fuel economy, comparatively.

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DISCUSSION (17)

jimz > MasterMario - Keeper of the V8s
08/01/2019 at 09:08

It’s a robust son of a b. Though it’s funny how dinky it looks in the Super Duty’s engine bay thanks to how much room they needed for the Powerstroke.

MasterMario - Keeper of the V8s > jimz
08/01/2019 at 09:21

I imagine it does considering it’s a pushrod engine going into the same engine bay. I hope it lives up to the hype, it sure sounds like it was designed as a workhorse engine first and not a numbers engine.

Discerning > MasterMario - Keeper of the V8s
08/01/2019 at 09:29

I wonder how well the heads flow.

Im looking forward to someone giving it a ridiculous cam and a short runner intake manifold (assuming the stock one emphasises torque with long runners).

I’m lso curious how the block’s exterior d imensions compare to an LS1. Hmmmm....

jimz > MasterMario - Keeper of the V8s
08/01/2019 at 09:34

powerstroke is a pushrod engine too, but because of the “inside out” flow (exhaust in the vee, intake on the outside) the cylinder heads are enormous. and so are the valve covers since they double as the intake manifolds.

Kinja'd!!!

Highlander-Datsuns are Forever > MasterMario - Keeper of the V8s
08/01/2019 at 09:53

I don’t recall a historic 445, 42 8, 460 yes but no 445.

ITA97, now with more Jag @ opposite-lock.com > jimz
08/01/2019 at 10:28

As a curious question, what’s the use case for this engine over the 3.5 ecoboost? I see some relatively smaller gains over the non high-output ecoboost, but this is way up in the RPM range. This seems like the classic way to get single digit towing mpg out of a big pickup. I guess I could see some appeal for big fleets of rental trucks like Uhaul who don’t care about fuel economy, but do care about longevity with a minimum of maintenance and upfront investment . I suppose a twin- turbo gas motor isn’t quite that, but then again the ecoboost V6's have proven pretty damned durable at this point.

From a working and towing perspective, I’d rather have turbos spooling up lower in the rev range when I need them and not spooling up when I don’t. There’s a scenario where I would consider a big gas truck with turbos, but I’ve done the big gas truck with a big displacement V8 before. I can’t imagine doing it again today.

Discerning > ITA97, now with more Jag @ opposite-lock.com
08/01/2019 at 10:36

This engine creates similar power and torque to the 3.5 EcoBoost in HO form (raptor). The torque may even arrive pretty early with direct injection.

The 3.5 may be better suited for towing (unsure), but this 7.3 will likely: cost less to produce, cost less to maintain, and prove to be more durable. The turbos on the EcoBoost aren't necessarily a liability, but they could be maintenance and durability issues in the long term, and this engine will likely see a lot of idling hours and hundreds of thousands of miles. It's also worth considering that the gas engine may turn out to be the choice in hauling applications (ie people) which may be more than enough for the basic 7.3.

RutRut > Highlander-Datsuns are Forever
08/01/2019 at 10:38

it was diesel.

jimz > ITA97, now with more Jag @ opposite-lock.com
08/01/2019 at 11:15

beats me. if you ask my opinion, it might be due to some lingering distrust of downsized turbo engines amongst the HD pickup crowd.

also keep in mind this thing will be available in everything up to the F-750, and a lot of those class 6 and 7 trucks which don’t opt for diesel run CNG instead. No CNG prep I’m aware of for the 3.5 EB.

Jordan and the Slowrunner, Boomer Intensifies > Discerning
08/01/2019 at 11:37

Despite some fans claims, it’s not built to be an LS competitor. It’s an iron block engine, built for low end power and durability. The LS started in cars and migrated to trucks.

Discerning > Jordan and the Slowrunner, Boomer Intensifies
08/01/2019 at 12:46

R egardless, I imagine a heavy duty engine like that will love boost if the heads flow well. Could be a fun project potentially.

E ven though the LS1 debuted in the C5, the truck counterparts with iron blocks have proven to be really potent engines in drag racing: lq4/9, LM7, LMF/ LY5, etc. Of course they have the advantage of being the same design as the LS engines essentially and benefitted from the Camaro and Corvette aftermarket.

I don’t anticipate to ever see this come standard in a Mustang, but it could be a fun swap if they become cheap enough. Aftermarket will stink of course, so the standard heads would need to flow well for it to be worthwhile.

Regardless, an LS swap will still be the most sensible option for engine swappers

HammerheadFistpunch > MasterMario - Keeper of the V8s
08/01/2019 at 13:13

Is anyone else enjoying the sheer GM’ness of this engine? Pushrods, cubes, etc.

MasterMario - Keeper of the V8s > HammerheadFistpunch
08/01/2019 at 13:16

Yes, that’s why it has piqued my interest

Jordan and the Slowrunner, Boomer Intensifies > Discerning
08/01/2019 at 13:37

I’m just saying the LS debuted as a rev happy (for an OHV) aluminum V8 in a sports car, then the iron block was developed off of that. They didn’t make a sporting engine out of a truck engine(the original smallblock debuted in a car as well.)

I imagine this will be like the 366 big block GM engines.

Discerning > Jordan and the Slowrunner, Boomer Intensifies
08/01/2019 at 13:40

Yeah, I know all about the LS and you are correct that this will be very different from that engine. Had a C5Z and was really active in the LS community for about 5 years.

I just think it could be interesting to see if anyone does anything with them to draw out more power.

HammerheadFistpunch > ITA97, now with more Jag @ opposite-lock.com
08/01/2019 at 13:46

Its a fleet motor for sure but the g ist is that it will have better loaded efficiency due to being stoichiometric in the load range vs very rich with a turbo. Plus low cylinder pressures and low loads on bearing surfaces mean long life which offsets the relatively low

Jordan and the Slowrunner, Boomer Intensifies > MasterMario - Keeper of the V8s
08/01/2019 at 14:09

454 comes back when?