New 6.8L V8 Engine Coming For Mustang in 2022?!

[Linkster1666]

My feeling is they stroker the 5.8.?

Expect to see a Boss 6.8?

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[engineermike]

We all know that pushrod motors can be built to rev, just not with tiny smooth-idling emissions-compliant cam specs and valve trains that will last 200k miles. In order to match coyote valve skirt area, you’d need a 3” intake valve! It takes a lot of cam duration to make up for that!

 

[crimson_crowd_eater]

I'm just going to leave this here:

Why is everyone so certain that this 6.8L will be a pushrod? I haven't seen any official publication claiming that. We could be getting something like a stroked 6.2 SOHC. While it is likely a pushrod at that displacement, you can't be sure.

 

[engineermike]

....or a v8 for that matter.

 

[IrishStallion]

With the big push to hybrid and finally electric I highly doubt there is going to be any large volume of 6.8 liter v8 mustangs ever happening. Why....is it really needed? A E85 tuned bolt on gen3 307 ci is already pushing 550 hp plus at the crank already n/a. Boost pushes them as high as your bank account can afford.

Now I am old enough to appreciate the big block cubic inches as it is another way to make power. I would see the 6.8-7.3 as a more speciality option or crate motor. F1 in 1986 was making 1500 hp out of a BMW m12 turbo 1.5 liter inline 4 banger. Point is you can make power in many ways...

 

[engineermike]

Something else noteworthy is that the short-deck modular coyote still hasn’t reached its limit. They didn’t even put gdi on the predator.....or turbos, for that matter. There’s at least another 200 hp in it if they want it.

 

[IrishStallion]

The GT500 pushes what can you realistically hook on the street. Street tires (not everyone wants sticky drag setup) with only hold so much...

 

[zackmd1]

With the big push to hybrid and finally electric I highly doubt there is going to be any large volume of 6.8 liter v8 mustangs ever happening. Why....is it really needed? A E85 tuned bolt on gen3 307 ci is already pushing 550 hp plus at the crank already n/a. Boost pushes them as high as your bank account can afford.

Now I am old enough to appreciate the big block cubic inches as it is another way to make power. I would see the 6.8-7.3 as a more speciality option or crate motor. F1 in 1986 was making 1500 hp out of a BMW m12 turbo 1.5 liter inline 4 banger. Point is you can make power in many ways...

IF this rumor is true and IF its intended to replace the coyote, I do see a way for it to be possible. Consider if the 6.8L is an Atkinson cycle engine (possibly with cylinder deactivation) mated to an electrified 10 speed. I would not find it hard to believe that this combination would be able to produce combined power exceeding the current Gen 3 Coyote while also being more efficient in terms of emissions and MPG. It is hard to say if this combination would be cost effective without knowing the exact cost difference between the Coyote and 7.3 but I wouldn't imagine it would be to far off from making sense from an engineering standpoint.

 

[zackmd1]

Is anyone sure it’s even a cam motor? Could be solenoid valve control. Every motor could be 20:1 compression with that technology.

I just dreaming now.

While I would love for something like that to be real, that tech is probably still to expensive to be in a vehicle such as the Mustang...

Everyone still seems to be thinking about this like hybrid tech is still unachievable. Like my post states above, a combination of existing technologies and a hybrid drivetrain could make this a reality and quite possibly better from an emissions standpoint then a coyote.

 

[shogun32]

The highway MPG might seem impressive but thats using cylinder deactivation

not on the SS/1LE thank goodness. My highway cruise MPG is downright impressive (over 30) but that's more a function of not driving at 80mph, useing 6th gear, and cruise control.

The skip-shift is really fracking annoying but you either learn to use the throttle with more than a feather or get a tune to knock it off, or a $20 plug that disables that malarky.

 

[engineermike]

Who else remembers when the new 4.8 liter v8 leaked out in a union negotiation announcement?

 

[crimson_crowd_eater]

Who else remembers when the new 4.8 liter v8 leaked out in a union negotiation announcement?

Didn't they end up saying that it was a lie and it wasn't coming?

 

[zackmd1]

Didn't they end up saying that it was a lie and it wasn't coming?

The 4.8 from what I know was real and was near final before Ford decided to go with the gen 3.

 

[ice445]

not on the SS/1LE thank goodness. My highway cruise MPG is downright impressive (over 30) but that's more a function of not driving at 80mph, useing 6th gear, and cruise control.

The skip-shift is really fracking annoying but you either learn to use the throttle with more than a feather or get a tune to knock it off, or a $20 plug that disables that malarky.

Oh okay good to know.

 

[I Bleed Ford Blue]

What I see happening is the coyote will stay as the standard V8, maybe bumped up to 5.2 and about 500 N/A hp.
The 7.3 is a truck engine for the F250 and up so the new 6.8 would be a smaller displacement of the 7.3 with an aluminum block, a little more cam and a little more compression for the 150's to give around 450 hp, then there will be a another version for a SE mustang, possibly bumped up to a 7.0 with even more cam and more compression to give around 550-600 N/A hp. And to get the most efficiency out of the 6.8-7.0 they will probably add direct injection to the mix.

I've watched a lot of engine dyno session on YouTube and the one common factor to limit rpm is the valve spring pressure. You can build any engine to spin to 9 or 10K rpm, as long you got the cam and heads to support making power that high up. But if your springs are not strong enough to prevent valve float, you won't make any more power and the more you push them past their limit, the worse the float becomes. BTW Brain Wolfe of team z motorsports is working on a 7.3 that is destined for a fox body and it makes 789 hp N/A and he has spun it to almost 8,000 rpm and it makes peak power at 7,600 and the 7.3 has a 3.976" stroke

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