Tony Alonso

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A Cobra Jet Mustang is the special edition that makes sense to me. In other words, a low volume application that is not street legal. I can't imagine Ford spending money to certify this powerplant for a limited edition car like the Mach 1, Bullitt, or Boss, especially with the Shelby GT500 using what it does. I could be wrong, of course.





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zackmd1

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Hmmm.... Return of the Boss 429 maybe?
 

zackmd1

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So my opinion is the 6.8L is the F150 variant. You could use the exact same block (alloy) with a special crank to achieve 7.0L or 429ci. While I would love for a rumor like this to be true, I doubt it is.
 

Erik427

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A Cobra Jet Mustang is the special edition that makes sense to me. In other words, a low volume application that is not street legal. I can't imagine Ford spending money to certify this powerplant for a limited edition car like the Mach 1, Bullitt, or Boss, especially with the Shelby GT500 using what it does. I could be wrong, of course.
I must ask this.

Why not a Demon competitor.......?

Why can't it be street legal?
 

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OMG click your heels together 3 times and say "I wanna believe, I wanna believe". No way. No how. Not ever. Will Ford be dropping a 6.8L into a mustang.
 

Tony Alonso

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I must ask this.

Why not a Demon competitor.......?

Why can't it be street legal?
It would be super cool if it happened for sure! Knowing that Ford has made a large financial commitment to EVs, I think they would not want to make that investment. I speculate that the emissions certification, suspension/handling development, and crash testing alone would give pause. That's not to say it couldn't be done, but Dodge owns that market niche for a street legal, very focused drag car.

It would be a hoot to see it. In the meantime, it keeps things interesting to guess :)
 

Falc'man

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OMG click your heels together 3 times and say "I wanna believe, I wanna believe". No way. No how. Not ever. Will Ford be dropping a 6.8L into a mustang.
Why not?

Even if it isn't alloy it won't be heavier than the Predator; certainly not as top-heavy. Size-wise it's the same a 351 Windsor, only longer for larger bore spacing. It's getting made specifically for F150 and Mustang on a new line so I'm betting they're not going to go to such lengths to make it cast iron when there's already a plant that spits them out in that material. What this basically means is it's a lot lighter than a blown Coyote and all the associated bits that come with it, and a whole lot cheaper to make whilst offering LT4 levels of power. It's a no-brainer.

So my opinion is the 6.8L is the F150 variant. You could use the exact same block (alloy) with a special crank to achieve 7.0L or 429ci. While I would love for a rumor like this to be true, I doubt it is.

Yes! 7.0/429 has a nicer ring to it.


. Where's @Topnotch? He called this 3 years ago.
 

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It's a no-brainer.
No brainer hey. No way. No how. Not ever. Will Ford be dropping a 6.8L into a mustang. Screen shot this for when the s650 comes out and the standard engine will be a 2.7l ecoboost.
 

martinjlm

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Why not?

Even if it isn't alloy it won't be heavier than the Predator; certainly not as top-heavy. Size-wise it's the same a 351 Windsor, only longer for larger bore spacing. It's getting made specifically for F150 and Mustang on a new line so I'm betting they're not going to go to such lengths to make it cast iron when there's already a plant that spits them out in that material. What this basically means is it's a lot lighter than a blown Coyote and all the associated bits that come with it, and a whole lot cheaper to make whilst offering LT4 levels of power. It's a no-brainer.

Yes! 7.0/429 has a nicer ring to it.


. Where's @Topnotch? He called this 3 years ago.
The part in bold is where the logic falls apart.
  1. It is NOT being developed for F150. It is being developed for F250
  2. Yes there is a plant that already spits out alloy block engines for F150 and Mustang. It’s not this one, though. It’s across town. (5.0L is built at Essex. 7.3L and 6.8L are built at Windsor)
  3. The line that it’s going on is fairly new, because it’s the same line that the recently introduced 7.3L OHV V8 (cast iron) is produced.
Basically, the 6.8L is a smaller displacement version of the 7.3L. It is produced in the same plant, on the same production equipment, using the same material. The F250/350 used to have 6.2L V8 base, 6.8L V10 uplevel. Last year Ford killed the 6.8L V10 and replaced it with the 7.3L V8. This year, Ford is killing the 6.2L V8, which is why Romeo plant is closing, and putting the replacement for it, the 6.8L V8, on the same line as the 7.3L V8.
 

Norm Peterson

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The part in bold is where the logic falls apart.
  1. It is NOT being developed for F150. It is being developed for F250
  2. Yes there is a plant that already spits out alloy block engines for F150 and Mustang. It’s not this one, though. It’s across town. (5.0L is built at Essex. 7.3L and 6.8L are built at Windsor)
  3. The line that it’s going on is fairly new, because it’s the same line that the recently introduced 7.3L OHV V8 (cast iron) is produced.
Basically, the 6.8L is a smaller displacement version of the 7.3L. It is produced in the same plant, on the same production equipment, using the same material. The F250/350 used to have 6.2L V8 base, 6.8L V10 uplevel. Last year Ford killed the 6.8L V10 and replaced it with the 7.3L V8. This year, Ford is killing the 6.2L V8, which is why Romeo plant is closing, and putting the replacement for it, the 6.8L V8, on the same line as the 7.3L V8.
Now that makes sense, with the big gains probably coming from closing the Romeo plant and consolidating two basic engine designs down to one. Though I am a little curious about there being only half a liter or so difference in the displacements either way.


Norm
 

shogun32

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104mm x 100mm = 6.8l
104mm x 107mm = 7.27l (maybe using 108mm)

For best combustion dual spark is recommended but since it's a truck and slow-revving they probably won't.
 

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7.3L = 4.22" bore x 3.976" stroke

6.8L could be 4.22 x 3.7-ish (less likely)
or it could be 4.07-ish x 3.976 (more likely)

Or something in between, except that you wouldn't get to share either the crank or the block's bore machining.


Norm
 

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7.3L = 4.22" bore x 3.976" stroke

6.8L could be 4.22 x 3.7-ish (less likely)
or it could be 4.07-ish x 3.976 (more likely)

Or something in between, except that you wouldn't get to share either the crank or the block's bore machining.


Norm
It makes more sense to keep the 4.22 bore and shorten the stroke for more rpms. Otherwise, I can't see a reason for two engines with nearly the same displacement. But, I'm one of those guys who used to hop up GMC 6 bangers when everyone else was doing SBCs, so don't listen to me!:lipssealed:
.
 

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