A new gas engine for GM heavy duty trucks is coming

[Groover]

A new 6.6L engine with 400hp and 450lbft of torque is coming for 3/4 ton through medium duty GM trucks. It will have all of the new fuel saving tech and seems to emphasize torque over horsepower. It is always nice to see more options for truck buyers.

http://gmauthority.com/blog/2018/10/next-gen-gm-hd-trucks-to-introduce-new-6-6l-v-8-gasoline-engine/

[rjstractor]

noteven wrote:
Why does everyone including OEM’s talk engine displacements in that damnfool metric anyways?

Because it's not 1980 anymore?

[Ralph_Cramden]

parker.rowe wrote:
Not sure how you can say this.

Rather B Fishin wrote:

It's a rumor and just because someone writes and article speculating about it does not mean it's a fact. SMH.

Then say this. Why is a 7.0 more likely than a 7.3? Its not like they say they are bringing back the mythical 7.3 diesel.

Rather B Fishin wrote:

Ford's 6.2 not getting replaced and will remain as the gasser for the light trucks. The 6.8 v10 is going away and will be replaced by a 7.0L for the medium duty/chassis cab trucks. This is the most likely scenario but everyone likes to believe a 7.3L will be offered. Don't hold your breath....

At least we have a picture of what we assume is an internal Ford doc stating the 7.3 is coming and will replace the 6.2 and the 6.8. It doesn't say it will come to the 250/350 class vehicles, however I don't think the 6.2 is available in any medium duty trucks...

Link us up to some stuff supporting your speculation.

One place it certainly is not going if its made or not is in a GM HD truck which is what this thread was about LOL.

[Bedlam]

noteven wrote:
Why does everyone including OEM’s talk engine displacements in that damnfool metric anyways?

So Canadians don't have to convert from cubic inches? Remember you guys jumped into metric much deeper than the United States.

[hone_eagle]

Ford 7.0


"A variation which will go into the Raptor"

Oh its coming all right,Ford is being deliberately obtuse 7.0 ,7.3 godzilla ........
but its coming and will go into as many vehicles as possible

[noteven]

Why does everyone including OEM’s talk engine displacements in that damnfool metric anyways?

[parker_rowe]

Not sure how you can say this.

Rather B Fishin wrote:

It's a rumor and just because someone writes and article speculating about it does not mean it's a fact. SMH.

Then say this. Why is a 7.0 more likely than a 7.3? Its not like they say they are bringing back the mythical 7.3 diesel.

Rather B Fishin wrote:

Ford's 6.2 not getting replaced and will remain as the gasser for the light trucks. The 6.8 v10 is going away and will be replaced by a 7.0L for the medium duty/chassis cab trucks. This is the most likely scenario but everyone likes to believe a 7.3L will be offered. Don't hold your breath....

At least we have a picture of what we assume is an internal Ford doc stating the 7.3 is coming and will replace the 6.2 and the 6.8. It doesn't say it will come to the 250/350 class vehicles, however I don't think the 6.2 is available in any medium duty trucks...

Link us up to some stuff supporting your speculation.

[Rather_B_Fishin]

ib516 wrote:

mkirsch wrote:
Rumors like this come around every couple of years. Believe it when you see it.

The Ford 7.3L rumor is all over the map. Websites saying they won't even be putting it in pickup trucks. People at Ford saying there's no such engine and never will be. Who do you believe?

The Ford 7.3L gas is fact, not rumor.
LINK

It's a rumor and just because someone writes and article speculating about it does not mean it's a fact. SMH. Ford's 6.2 not getting replaced and will remain as the gasser for the light trucks. The 6.8 v10 is going away and will be replaced by a 7.0L for the medium duty/chassis cab trucks. This is the most likely scenario but everyone likes to believe a 7.3L will be offered. Don't hold your breath....

[harmanrk]

ib516 wrote:

mkirsch wrote:
Rumors like this come around every couple of years. Believe it when you see it.

The Ford 7.3L rumor is all over the map. Websites saying they won't even be putting it in pickup trucks. People at Ford saying there's no such engine and never will be. Who do you believe?

The Ford 7.3L gas is fact, not rumor.
LINK

As I have been to the plant where they are going to build it, and seen the line taking shape, I'm inclined to believe the rumors of Godzilla are true.

[msjdbman]

So a new 6.6 litre is coming!! It reminds me of the old 400 small block. 4.125 bore and 3.75 stroke. I ran one for years and years. It was exceptionally easy to wake those up and get some great hp and torque.

[ib516]

mkirsch wrote:
Rumors like this come around every couple of years. Believe it when you see it.

The Ford 7.3L rumor is all over the map. Websites saying they won't even be putting it in pickup trucks. People at Ford saying there's no such engine and never will be. Who do you believe?

The Ford 7.3L gas is fact, not rumor.
LINK

[mkirsch]

Rumors like this come around every couple of years. Believe it when you see it.

The Ford 7.3L rumor is all over the map. Websites saying they won't even be putting it in pickup trucks. People at Ford saying there's no such engine and never will be. Who do you believe?

[parker_rowe]

Ralph Cramden wrote:

FishOnOne wrote:
I wonder if this engine will be based on gm's current small block or will it be an all new engine

I suspect still based on the small block, and will remain a cast iron block. Its fairly easy to increase the bore, stroke, or both to get to 6.6. You would only need to beef up the casting to get the bore out to 4.25 from the current 4.0 with the 6.0, and you would almost have the 6.6 displacement right there at the current stroke, but I would assume a combination of both bore and stroke. Thats without even getting to the heads. GM performance already has blocks that can be taken out to that range.

Then add in direct injection over the current SFI used in the 6.0.

Of course some version of cylinder deactivation is in the works FWIW.
Maybe they'll have some method of deactivation for the deactivation.

I was looking ahead to the 2019 / 2020 HD body redesign, but no first year engine is going to be bought here be it GM, Ford, Ram, or anyone else. Had one of the first GM LM7 5.3's in 2000 with the common piston /wrist pin slap at cold startup. 230,000 miles when sold in 2012 and still on the road 18 years later with no problems, but that knock when cold for a minute or two every morning was enough to drive you crazy. Almost enough to send you over the cliff when they tell you its "normal" which it apparently was.

I agree..I don't believe they are going to design a whole new engine for a 6.6L.

The LS platform is already available in 7.0L in cars, and the iron block 6.0 is stout, if a bit long in tooth. It seems to do well in comparison tests even though it has less horsepower and torque than both the Dodge 6.4 and the Ford 6.2.

Boost the displacement a little, update a few other things. Boom, 400hp/450ftlbs torque.

The whole big block/small block thing is kind of out the window these days. The 6.8 V10 is just a "Small Block" 5.4 with 2 more cylinders.

The 6.4 Hemi is just...a 6.4 Hemi with some changes to fit the HD application better. The same with Fords 6.2. The bottoms ends on todays "small blocks" are much stronger the they use to be.

[NWnative]

Glad to hear the GM is finally looking to update their gas option in the HD trucks. Ford and Ram are as well in the next couple of years. It's nice to have better alternatives out there for those that don't need a diesel. There is always something new on the way....sooner or later, one has to make a decision and get what they feel is best for them. I went with the tried and true ford 6.2...has been a very reliable and stable platform since it was introduced. No way I would want to be a guinea pig on a new engine.....

[Groover]

ACZL wrote:
GM had a darn good set up with their 8.1 gasser few years back. Too bad they did away w/ it. How many folks long for the days of Ford's 460, GM's 454 and want to say Dodge/Ram's 460 cu in engines?

I owned a 460, a Mopar 440 and a Ford V10. All good engines in their day but my two Ecoboost engines give 20 to 25% better mileage and much more power with much less maintenance. They might blow up today but so far I am not looking back at all.

[ACZL]

Ralph Cramden wrote:

FishOnOne wrote:
I wonder if this engine will be based on gm's current small block or will it be an all new engine

I suspect still based on the small block, and will remain a cast iron block. Its fairly easy to increase the bore, stroke, or both to get to 6.6. You would only need to beef up the casting to get the bore out to 4.25 from the current 4.0 with the 6.0, and you would almost have the 6.6 displacement right there at the current stroke, but I would assume a combination of both bore and stroke. Thats without even getting to the heads. GM performance already has blocks that can be taken out to that range.

Then add in direct injection over the current SFI used in the 6.0.

Of course some version of cylinder deactivation is in the works FWIW.
Maybe they'll have some method of deactivation for the deactivation.

I was looking ahead to the 2019 / 2020 HD body redesign, but no first year engine is going to be bought here be it GM, Ford, Ram, or anyone else. Had one of the first GM LM7 5.3's in 2000 with the common piston /wrist pin slap at cold startup. 230,000 miles when sold in 2012 and still on the road 18 years later with no problems, but that knock when cold for a minute or two every morning was enough to drive you crazy. Almost enough to send you over the cliff when they tell you its "normal" which it apparently was.

Wasn't the "knocking" sound you heard GM's famous "Piston Slap"? Had it in my '97 350ci and that's what I was told it was shortly after I bought it. Go figure.