GM's New Turbo Diesel has no manifolds!!!!!!

[AutoXRacer]

Here is the article:
http://www.sae.org/automag/technewsletter/080108Tech/01.htm

Very interesting design, though I assume its not mod friendly...

[turbolife]

Hmm...according to the article it fits the same profile as a small block. Maye the general will wisely release some diesel pass. cars?

[tsunami]

moved to auto news... and i didn't check first to see if its a repost so delete if needed... interesting stuff though

[NVP5White]

Very interesting idea which is exactly the kind of thinking we need to make diesels a larger reality in the US market. Note that I'm all for diesels where they make sense like in trucks, but maybe not in every passenger car on the road. In many (most?) cases gasoline engine represent a better mix of efficiency and performance.

A couple of parting thoughts...is there an intercool for this? Also, I couldn't exactly see where the turbo was located in the image in the article, but it looks like the turbo would lie in or very close to vee between cylinder banks. It seems heat build-up might be a problem with that location. Turbos are often placed in tights spaces, but like the new BMW turbo 3.0L engine they are place low in the engine bay, close to moving air.

Finally, what are repair costs going to be for an engine like this? It seems that many, many parts of the engine were moved to accommodate this new layout, but I don’t really trust GM to have put them in a good spot.

[bmman93]

Idk If It Would Work In A Car To Much Unless It Gets The Gas Milage Of The Tdi! Diesil Is To Damn Expensive Right Now. Glad I Bought The Ms3 Insted Of A 2500 Hd Ram

[downtube]

Domestic automaker philosophy on diesel in NA has been "if we sell diesel, it just displaces our own gas engine sales, so what's the point?" HD pickups are the exception for reasons specific to that market segment.

I do expect diesel in pass car to grow in the next few years. Whether it snowballs, driving diesel fuel cost down, or remains a niche, nobody knows.

[aMaff]

LOL @ the title. I was wondering if you meant they were going to use ITBs and zoomies on the exhaust to get away with no manifolds....

It had a SINGLE exhaust manifold in the area between the banks in the V that connects to both cylinder heads. And it essentially has an intake manifold built in to the cam cover.

[Rogue]

Idk If It Would Work In A Car To Much Unless It Gets The Gas Milage Of The Tdi! Diesil Is To Damn Expensive Right Now. Glad I Bought The Ms3 Insted Of A 2500 Hd Ram
but figure out the cost per mile. Premium is just as expensive as Diesel, but you get nearly twice the mileage out of it, essentially cutting the cost of diesel in half.

[Hughes412]

I say it sounds cool! I would hope GM looked at the heat soak problem. But it depends on how they test the engine. If it was on a stand then it wouldn't be as bad as it being in a car. It didn't say anything about and inter cooler, but I think it would have to have one for that reason. I'm wondering how heavy this engine is....

Compacted graphite-iron (CGI) optimizes the cylinder block's strength and mass.

That sure sounds like it would be alot heavier then a stock block!

It will be cool to see it though. I'm all for diesel engines in big cars.

[NVP5White]

It appears that CGI is stronger then gray iron, but more fatigue resistant then ductile iron. When used in conjunction with good design, a CGI engine can be made lighter then aluminum engine of equal power output. Engine manufacturers have been using it for years...

http://www.competitiveproduction.com/features/default.aspx?article_id=1388&volume_no=3&issue_no=2

[TinmanMS6]

Idk If It Would Work In A Car To Much Unless It Gets The Gas Milage Of The Tdi! Diesil Is To Damn Expensive Right Now. Glad I Bought The Ms3 Insted Of A 2500 Hd Ram


but figure out the cost per mile. Premium is just as expensive as Diesel, but you get nearly twice the mileage out of it, essentially cutting the cost of diesel in half.

Not double, closer 30-40% in most cases. When you figure that the cost of diesel is about $.40 more than gas/gallon (<15%) the additional cost is outweighed by the mileage gains. When you figure in the added cost of the diesel powertrain, however, the economic benefit is diminished somewhat.

Assuming that a gas-powered car gets 25mpg and the diesel version of the same car gets 35mpg, with gas at $3.00/gallon and diesel at $3.40/gallon, driving 15,000 miles per year, you will see fuel savings of $343/year. If that diesel cost $2000 more than the gas-powered equivalent, it will take about 6 years to break even.

That's assuming that increased demand for diesel doesn't affect the cost of fuel too much in coming years, and doesn't take into account the environmental benefit of burning over 170 fewer gallons of fuel annually.

[Rogue]

way to get all technical...geeze

[TinmanMS6]

way to get all technical...geeze

It's what I do. I work as an analyst. I analyze stuff.

[Foolish]

If that diesel cost $2000 more than the gas-powered equivalent, it will take about 6 years to break even.
Which should be fine if you plan on keeping the car for a long time, especially since diesels routinely last 300,000+ miles!


That's assuming that increased demand for diesel doesn't affect the cost of fuel too much in coming years, and doesn't take into account the environmental benefit of burning over 170 fewer gallons of fuel annually.It could be assuming that increased demand for diesel does affect the cost of fuel. A shift in the relative demand for gas/diesel could raise or lower the price of either!

Oh! Does anyone know if this is the diesel they're considering using in the CTS coupe?

Edit: Nope. Looks like that's a 2.6L V6. It was the comment about the "closed loop feedback system" (http://www.thetruthaboutcars.com/reviews/caddys-mid-size-diesel-coupe-huh/) that made me think of this engine.

[aMaff]

It's what I do. I work as an analyst. I analyze stuff.

Woah woah woah woah woah.



Woah.



You do work?

[TinmanMS6]

Woah woah woah woah woah.



Woah.



You do work?

Sorry. I should have said "I am employed as an analyst." Also note that I didn't specify what I analyze. It's usually not what I'm getting paid to do.