GM's surprising new V8 diesel has no manifolds

[T-Type]

From SAE:


Right side of the new V8 shows lack of exhaust manifold. Intake route is straight into the top of the intake cam boxes.


General Motors has taken some of the wraps off of its 2010 Duramax diesel V8, revealing clever design features and technologies that clearly push the state-of-the-art in Vee-type compression-ignition engines.

Unveiled during a media briefing at its Milford, MI, Proving Grounds, the new 4.5-L powerplant will be one of the most powerful, lowest-emitting, and package-efficient light-duty V8 diesels in the marketplace, company engineers claimed.

The new Duramax is scheduled to enter production in late 2009 at GM's Tonawanda, NY, engine plant. It will power GM's full-size pickup trucks and utilities, among other potential applications. Rated output is targeted at more than 310 hp (231 kW), for 68 hp/L (51 kW/L), and 520 lb•ft (705 N•m).

The Duramax was designed to fit within the ultra-compact envelope of GM's small-block gasoline V8. Its NVH profile also targets the gas engine. These aggressive requirements drove many of the engine's innovations announced to date.

http://www.sae.org/automag/technewsl...108Tech/01.htm

[SuperSS27]

we knew this about 3 months ago. Still a really good design.

[elderon]

Very nice.

Will this find its way into any cars?

[megeebee]

This is a stupid question, I suppose. But, is this engine adaptable to passanger cars or is it only for trucks?

[nsap]

Originally Posted by megeebee

This is a stupid question, I suppose. But, is this engine adaptable to passanger cars or is it only for trucks?

It should be able to fit in anything that the current small-block fits in. Namely Zeta.

[ptmeyer84]

i dont know much about diesels, but this technology seems like it is alot more complex than the current duramax. I think this may be an expensive engine. The fact that they are trying so hard to make it fit in the same applications as the small block makes me think that there are plans for car applications. G8 anyone?

[hotrod1949]

Sounds very interesting, should also fit under the hood of the CTS, which may make it more popular in some markets(EU)

[megeebee]

Originally Posted by nsap

It should be able to fit in anything that the current small-block fits in. Namely Zeta.

This is precicely what I was wondering. I'm thinking about Cadillac and its fortunes in Europe. I know the CTS is getting the 2.9 in a year or so. The larger Zeta based sedan would certainly benefit in the "Old World" if it were available with a Diesel.

Do you think it would be adaptable to Sigma for the CTS series? A larger, more powerful Diesel might be the way to sell the idea to Americans.

[nsap]

Originally Posted by hotrod1949

Sounds very interesting, should also fit under the hood of the CTS, which may make it more popular in some markets(EU)

The CTS already has a diesel. The 2.6L V6 that we are discussing below.

Originally Posted by megeebee

This is precicely what I was wondering. I'm thinking about Cadillac and its fortunes in Europe. I knw the CTS is getting the 2.9 in a year or so. The larger Zeta based sedan would certainly benefit in the "Old World" if it were available with a Diesel.

Do you think it would be adaptable to Sigma for the CTS series? A larger, more powerful Diesel might be the way to sell the idea to Americans.

As far as I know the only diesel Sigma will have is the 2.9L. I don't think it is at it's maximum output yet anyway. Much of the reason behind only having the 2.9L is for tax purposes in the EU. Smaller displacement engines have more tax breaks.

[T-Type]

Originally Posted by ptmeyer84

i dont know much about diesels, but this technology seems like it is alot more complex than the current duramax. I think this may be an expensive engine. The fact that they are trying so hard to make it fit in the same applications as the small block makes me think that there are plans for car applications. G8 anyone?

Yes and no. The lack of manifolds should translate to a somewhat lower cost (less parts).

The part I highlighted would seem to indicate that this motor will be going into cars and not just trucks.

[Rick_VT]

The performance motor of the future a V8 diesel??? With CAFE and god knows what other ideas they come up with a V8 diesel may be the only V8 motor of the future, would love to know what kind of mileage this motor would get in a car the size of the G8 or Impala with a 6Sp auto or manual for the enthusiast out there, although for car applications maybe a 4.0Ltr version might be better

[GMforME]

I got to tell you these things are great so far. And their really quiet for diesels. I was worried when they told us we were doing an in house light duty diesel but this thing surpases my expectations by a bunch.

[WishIhadatruck]

I drool just thinking of having that much torque in a sedan like the G8. I wonder what the fuel economy penalty of this engine is compared to the 2.9L in a car. It seems to be overkill in anything smaller than a full size truck or suv (and some will appreciate that). The 2.9L has lots of torque compared to most cars and descent hp as well. My personal preference would be the one that uses less fuel.

[WishIhadatruck]

Maybe this is the replacement for the Ultra V8 as well?

[KIDDIESEL79]

I can't wait to see this engine. I love the Duramax although one in my fleet has a nightmare from day one. This new "baby" should do wonders if put into the Zetas. Look at the power, and it's aluminum too, so minus the manifolds, this should be a light weight diesel that would really propell a full size car.