Ford Big Block V-8 returns...

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Ponyguy
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Ford Big Block V-8 returns...

Post by Ponyguy » February 6th, 2019, 11:18 pm

... with pushrods, no less!

Debuting with the 2020 Super Duty trucks is Ford's newest V-8engine... the 7.3 liter.

Not many details abound about this new bruiser of an engine... but it's a 2-valve design with forged steel crankshaft, pushrod-activated valves, and variable valve timing. It's got a cast iron block and it's designed to be narrower than the SOHC 6.2, which it will replace, at least as an optional upgrade over the gas 6.2. The narrower block helps it fit in more and different vehicles. Since the 6.2 offers ~385 HP
and 430 lb-ft, it's probably safe to say this new 7.3 will offer well into the 400 - 450 HP range. Torque rating is still up for grabs, but the DodgeRam with the HD Cummins offers 1000 lb-ft, and Ford's 6.2 brings 430 lb-ft to the counter.

I'm curious to see what this new engine looks like... it's labeled as "all new," but I wonder if there are traces of the SOHC within... or even bits from the old FE lineup of engines?
https://www.tfltruck.com/2019/02/heres- ... w-7-3l-v8/
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Re: Ford Big Block V-8 returns...

Post by Ponyguy » February 8th, 2019, 8:34 pm

Here's a Youtube video with some feature data... The Ford spokesguy doesn't say what the bore spacing is, but he does say that this 7.3 is "longer than the 6.2" engine...
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Re: Ford Big Block V-8 returns...

Post by junkyardjeff » February 9th, 2019, 11:03 pm

It does not look like anything from the past.
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Re: Ford Big Block V-8 returns...

Post by Ponyguy » February 13th, 2019, 3:55 pm

According to a friend who works at a local Ford dealership, at the Chicago Auto show currently going on... the new 7.3 V-8 is drawing a lot more attention than the soon-to-come refreshed 2020 SuperDuty trucks... lots of interest and questions from the hot-rod community... particularly the Raptor guys.
But, he says the 7.3 is primarily a truck motor... has an iron block and it's too heavy for the Mustang... maybe even too heavy for the Raptor.
Maybe if they were to cast it in aluminum, and get a set of free-flowing heads and a hotter cam, it'd work better as a performance engine.
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Re: Ford Big Block V-8 returns...

Post by Ponyguy » August 2nd, 2019, 3:50 am

Well, Ford released the HP & TQ numbers for the new 7.3 liter V-8, and they're a little lower than many truck guys had expected.
The guys at TFLTruck had predicted "somewhere above 450 HP and well over 500 lb-ft of torque," when they extrapolated the ratings from their present gasoline engines.
Ford announced a couple of ratings for the 7.3... the top rating is 430 Horsepower @ 5500 R/M, and 475 lb-ft @ 4000 R/M. (Which are still outstanding for a gasoline truck engine.)
They also offer a lower rating for Commercial Duty of 350 HP and 468 lb-ft both @ 3900 R/M... (These lower power engines are for Cutaway and Stripped chassis models.)

The numbers are class-leading, but are disappointing to a few HD truck guys who expected more. However, as I recall, Ford originally issued one set of ratings when it introduced its 6.7 "Scorpion" Diesel, and shortly thereafter, issued a set of higher ratings to surpass the Cummins Crew at MOPAR. Perhaps Ford is fudging the numbers again for a while...

Personally, since Diesel fuel is generally priced pretty close to gasoline, and Diesel Rigs are usually about $10k more than gas engines, and also require DEF, I believe the heavy duty gasoline truck engines are starting to make a lot more financial sense for Medium Duty trucks, like the F-600, F-650 and F-750 trucks, particularly for companies who don't plan to keep their trucks more than four or five years. Heavy Duty gas truck engines can be just as durable and long lasting as the Diesel counterpart, and can cost a lot less to purchase and operate.
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Re: Ford Big Block V-8 returns...

Post by GM_Guy » August 3rd, 2019, 12:15 pm

Classic big block when it comes to hp & torque, power down low to move heavy shit, not rip through the 1/4 as fast as possible. Anyone come across the weight of this 7.3?
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Re: Ford Big Block V-8 returns...

Post by Ponyguy » August 3rd, 2019, 5:21 pm

GM_Guy wrote:
August 3rd, 2019, 12:15 pm
Classic big block when it comes to hp & torque, power down low to move heavy shit, not rip through the 1/4 as fast as possible. Anyone come across the weight of this 7.3?
I haven't seen anything specific, but my guess would be that it's likely in the same league as the old FE and 385 big blocks... likely around 650 - 700 pounds...
If they would use aluminum heads and other lightweighting tricks, they might get it a little under 600 pounds, but it's an iron block. I'd like to see them try using CG instead of grey iron for the block... a lot stronger, and a little bit lighter.
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