4.5L Duramax

  

Diesel

Here's some preliminary information on the new 4.5-Liter Duramax turbo-diesel.

Type : Turbo-Diesel

Configuration : V8 DOHC

Displacement : 4.5L

Block construction : Compacted Graphite Iron (CGI)

Cylinder Heads : Aluminium with integrated manifolding

Injection method : Electronically controlled, ultra-high-pressure, common-rail fuel injection.

Forced Induction : Variable-vane turbocharger with intercooling

Emissions equipment : NOx after-treatment system with a diesel particulate filter (DPF)

HP and Torque : Ratings in excess of 310 horsepower and 520 lb-ft of torque.

Applications : GM light duty pickups and SUV's




I'm excited about this engine its just a shame it wasnt available for a couple of years with out the emissions crap on it. I'm not sure how much involvement Isuzu played in its development since GM has mostly cut the ties with Isuzu. If the durability and dependability of the 6.6 and 7.8 Duramax are any indication of this one then it should be one hell of a engine. Right now its slated to be put in the half ton Sierra's and Silverado's and the H2 but I think there's a good chance it may end up in the Suburban, Yukon, Tahoe etc.

  

dimerunner88

any word on release dates?

  

Diesel

Should be available in 09.

  

dimerunner88

sweet,hopefully they don't pussy out and only offer it in a automatic. 4.5 w/ the 6-spd would rock in a half-ton

  

Diesel

I'm not sure if there will be a manual available or not. I believe the 6L90 will be the automatic choice since the Allison is a bit overkill.

  

dimerunner88

ya i figured on the 6l90e but i want a manual damnit

  

Diesel

As do I but who knows with GM.

  

mister880

great information. i plan on getting a diesel truck in a few years.

     

GeorgesBlazah

Id love to have one of those in my Blazer.

  

Diesel

That's what I'm thinking but I think I would leave off the Nox and DPF systems

  

Diesel

More info on the new 4500 Duramax.

At the General Motors Powertrain Technology show, ABG learned more about the upcoming 2009 Duramax 4500 diesel V-8. GM made some unusual design choices in order to improve the efficiency and get the engine to fit in the same package size as the traditional small block V-8.

GM started off by choosing a 72 degree bank angle rather than the typical ninety degrees making the engine narrower. Most V-8 engines traditionally have had the intake manifold in the V between the cylinder banks with the exhaust manifolds on the outside of the heads. The new Duramax places the exhaust manifold in the valley along with the turbocharger.

Continue reading about the new Duramax 4500 after the jump.
Placing the exhaust and turbo in the V allows for very short exhaust runs and minimal heat lost from the exhaust gases. That means more of the energy in the hot exhaust can be used to spin the turbo and the response is quick. The intakes are on top of the cylinder heads directly over the intake valves. The outer sides of the cylinder heads are devoid any appendages which allows for easy assembly line installation.

Downstream of the turbocharger comes all the hardware to make the new engine fifty-state legal and Tier 2 Bin 5-compliant. A diesel particulate filter cleans up the soot while excess nitrogen oxides are addressed by a urea injection system. The urea will need to be replenished periodically, but it should last longer than the oil change interval.

Overall, the Duramax 4500 should provide a great, fuel-efficient option for the light duty trucks while improving towing capability. The possibility of installing the new engine in passenger car applications certainly exists thanks to the packaging, but whether it happens will depend in part on how well other new diesels are accepted in the market in the next couple of years.

     

GeorgesBlazah

Wow...Id like to see a pic of it!

  

Diesel

Look at the first post in this thread

     

GeorgesBlazah

Oh shit that didnt show up the last time I was here. lol opps

  

dimerunner88

there was an article in this months diesel power where they talked to an engine designer or something

  

lowwrider611

ya i read that its a pretty sweet engine but the turbo is in the middle which just looks odd to me.

  

lowwrider611

i kinda want to put one in my s10.

  

Diesel

Putting the turbo in the valley allows the engine to be more compact, the exhaust actually exits the head where the intake manifold would be on most engines for the very reason to reduce the amount of piping that would be required allowing it to fit anywhere that a LSX series gas engine would.