sequential single turbo

[awd95mn]

Bookem;287124 wrote:
With the 2010 emissions they will be ahead of Europe in Nox standards, google it and it should be everywhere. Funny thing is 2004 emissions they wanted to get emissions down by using egr, but that increased exhaust temp too high creating high Nox levels, so 2007 they wanted to lower that with ulsd fuel and dpf, now 2010 they want it lower. Everything they have done adds weight and lowers fuel mileage, they could have just let engine manufacturers meet a mpg rating, thus lower emissions because less fuel is being used, which would save everyone $ except oil tycoons and the government taxing the crap out of fuel. Go figure.

I'm still in the air on this, but I don't see the mileage getting worse in 2010. For 2010 Cummins claims that by using the DPF along with the SCR they are able to improve fuel mileage. There have been claims that they have discovered a 6% improvement over the 2004 era trucks and that 6% increase includes the cost of urea. In 2007 the mileage was so poor because they had to mess with the fuel mapping to make up for the added restriction and the burn off stage, but now for 2010 they are able to more accurately tune the fuel mapping due to being able to better burn the fuel.

PSiedTSi;287132 wrote:
I'm pretty sure he's talking about the 4.5 liter thats been delayed. Considering that would be more "light duty" than a 6.7 or 8.3

You are correct sir, but I think it is larger then that. I'm not entirely sure on what the displacement is though, I want to say it's around 5.0l, but I don't remember off the top of my head. It is a V8 and will go in the 1/2 ton pickups, which could be something other then Dodge. I am pretty sure Cummins should be producing some of them right now or are very close. The turbo is under the intake manifold which is really dumb, lots of stuff to take off the get at it. I asked one of the engineer's about heat soak and he said that shouldn't be a problem. We will see I guess.

[24valvenotak]

awd95mn;287148 wrote:
I'm still in the air on this, but I don't see the mileage getting worse in 2010. For 2010 Cummins claims that by using the DPF along with the SCR they are able to improve fuel mileage. There have been claims that they have discovered a 6% improvement over the 2004 era trucks and that 6% increase includes the cost of urea. In 2007 the mileage was so poor because they had to mess with the fuel mapping to make up for the added restriction and the burn off stage, but now for 2010 they are able to more accurately tune the fuel mapping due to being able to better burn the fuel.

You are correct sir, but I think it is larger then that. I'm not entirely sure on what the displacement is though, I want to say it's around 5.0l, but I don't remember off the top of my head. It is a V8 and will go in the 1/2 ton pickups, which could be something other then Dodge. I am pretty sure Cummins should be producing some of them right now or are very close. The turbo is under the intake manifold which is really dumb, lots of stuff to take off the get at it. I asked one of the engineer's about heat soak and he said that shouldn't be a problem. We will see I guess.

yay pickups

get back to fargo and put new heads on an intrepid:drunken_smilie:

[91nbtsi]

EPA 2010 will increase fuel mileage for manufacturers using SCR. They are able to increase the efficiency of the engines via tuning lower EGR rates, producing more NOx. However, because they are now treating it out of the cylinder with the SCR, the NOx is not an issue. With the engine tuning and lower EGR rates the engines will also produce lower amounts of soot, hence less DPF regenerations and less fuel wasted. But, all this comes with more hardware, more computers, added weight, and another tank to fill.

Manufacturers such as Navistar...have chosen to not use SCR and rely on credits and "massive" EGR rates to meet the NOx requirements. Expect their fuel economy to drop even further.

I love tree huggers.:icon_geek: