Is It A Fact?
FTE Leadership Emeritus
Joined: May 2004
Posts: 18,787
Likes: 30
From: Melbourne, Aus
The reason for larger capacity is due to NOx.
NOx is created from heat in the combustion chamber (it comes from the side reaction of heating the nitrogen that is present in the air sucked into the engine).
There are a few ways to increase HP on a turbo.
Increase Compression Ratio (hotter)
Increase Turbo boost (can be hotter... not if it is effectively cooled)
Increase Capacity.
So... to maintain the same (or a bit more) power, they are lowering the Compression ratio, increasing the boost and the capacity.
NOx is created from heat in the combustion chamber (it comes from the side reaction of heating the nitrogen that is present in the air sucked into the engine).
There are a few ways to increase HP on a turbo.
Increase Compression Ratio (hotter)
Increase Turbo boost (can be hotter... not if it is effectively cooled)
Increase Capacity.
So... to maintain the same (or a bit more) power, they are lowering the Compression ratio, increasing the boost and the capacity.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
The reason for larger capacity is due to NOx.
NOx is created from heat in the combustion chamber (it comes from the side reaction of heating the nitrogen that is present in the air sucked into the engine).
There are a few ways to increase HP on a turbo.
Increase Compression Ratio (hotter)
Increase Turbo boost (can be hotter... not if it is effectively cooled)
Increase Capacity.
So... to maintain the same (or a bit more) power, they are lowering the Compression ratio, increasing the boost and the capacity.
NOx is created from heat in the combustion chamber (it comes from the side reaction of heating the nitrogen that is present in the air sucked into the engine).
There are a few ways to increase HP on a turbo.
Increase Compression Ratio (hotter)
Increase Turbo boost (can be hotter... not if it is effectively cooled)
Increase Capacity.
So... to maintain the same (or a bit more) power, they are lowering the Compression ratio, increasing the boost and the capacity.
New User
Joined: Apr 2008
Posts: 24
Likes: 0
From: Britsh Columbia Canada
[The point is the 7.3 has had its share of issues too. UVC Harness corrosion, shorting out, etc..The crackling #8 injector, EBP sensors getting plugged up, early IDM problems, romping, and a lot more common issues. Most of these problems were worked out in the later years, but guess what? Same for the 6.0. The 6.0s were quite reliable power plants by 2006[/quote]
Yes i know all about the 7.3 liter problems,EBP sensors getting plugged but that was mostly caused by poor fuel quality. IMO. I am a Ford tech and have just never or heard of a 7.3 in stock form melting pistons. And most of our clients drive trucks.So i was abit sursprised to see someone saying that,thats all. As for the 6.0l being quite reliable by 2006,well the jury is still out on that IMO... I and i am not knocking the product i am a ford truck diehard fan. Just gets frustrating when you have to see the same problems day in and day out...
Cheers.
Yes i know all about the 7.3 liter problems,EBP sensors getting plugged but that was mostly caused by poor fuel quality. IMO. I am a Ford tech and have just never or heard of a 7.3 in stock form melting pistons. And most of our clients drive trucks.So i was abit sursprised to see someone saying that,thats all. As for the 6.0l being quite reliable by 2006,well the jury is still out on that IMO... I and i am not knocking the product i am a ford truck diehard fan. Just gets frustrating when you have to see the same problems day in and day out...
Cheers.
Elder User
Joined: Jun 2007
Posts: 937
Likes: 0
Anyone else notice the current trend in diesels going the wrong way, back to large displacement engines? The 5.9 Cummins went to 6.7, 6.0 PSD went to 6.4, then is going to go to a 6.7. All in the name of emissions too. Seems like the EPA really needs to look more into these things before they make the laws.
But I still have high hopes for the Scorpion, especially after learning that it is employing Ford/PSA JV tech.
Posting Guru
Joined: Jun 2006
Posts: 2,096
Likes: 0
A recent visit to the International Engine web page reveals that they no longer show a picture of a Ford truck when showing applications in "consumer vehicles" but rather a truck with a prominant "bowtie" in the grill. 
Elder User
Joined: Feb 2007
Posts: 629
Likes: 2
From: DFW Metromess, TX.
Elder User
Joined: Feb 2007
Posts: 629
Likes: 2
From: DFW Metromess, TX.
[The point is the 7.3 has had its share of issues too. UVC Harness corrosion, shorting out, etc..The crackling #8 injector, EBP sensors getting plugged up, early IDM problems, romping, and a lot more common issues. Most of these problems were worked out in the later years, but guess what? Same for the 6.0. The 6.0s were quite reliable power plants by 2006
Yes i know all about the 7.3 liter problems,EBP sensors getting plugged but that was mostly caused by poor fuel quality. IMO. I am a Ford tech and have just never or heard of a 7.3 in stock form melting pistons. And most of our clients drive trucks.So i was abit sursprised to see someone saying that,thats all. As for the 6.0l being quite reliable by 2006,well the jury is still out on that IMO... I and i am not knocking the product i am a ford truck diehard fan. Just gets frustrating when you have to see the same problems day in and day out...
Cheers.[/quote]Ex-neigbor in my old hood had the 7.3 engine. It melted a piston, but the engine had over 200K and some peripheral device failed (I forget what, so don't ask)...At least that was the dealerships story. He fixed it and drove it another 200K pulling his fifth wheel camper. I think his son is driving that truck now.
Posting Guru
Joined: Jun 2006
Posts: 2,096
Likes: 0
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Posting Guru
Joined: Jul 2006
Posts: 1,288
Likes: 0
From: Leamington, Ontario
You guys do know that International bought out the GM medium duty truck line right?
Posting Guru
Joined: Jun 2006
Posts: 2,096
Likes: 0
1st. ?; I dunno. What does it say on the bottom of the front license plate that is obscurred by the International advertising script?
2nd. ?; Yep.
Elder User
Joined: Feb 2007
Posts: 629
Likes: 2
From: DFW Metromess, TX.
1. Isn't that just an agreement to consumate a deal? I didn't think that got past the Anti-trust folks yet. Meaning that it's in the works, buy not consumated.
2. Yup again, but that is the Brazilian light duty truck (aka Colorado), not medium duty (aka Kodiak, and others) in the picture.
2. Yup again, but that is the Brazilian light duty truck (aka Colorado), not medium duty (aka Kodiak, and others) in the picture.
Junior User
Joined: Jul 2003
Posts: 67
Likes: 2
From: North Georgia
Look at the inside pages of Navistar. . .
. . .where you see the Central/South American Blazer/S10 with the 4.07L
MWM INTERNATIONAL Motores
One doesn't have to read Spanish or Portuguese to figure it out. . .
MWM INTERNATIONAL Motores
One doesn't have to read Spanish or Portuguese to figure it out. . .
Posting Guru
Joined: Jun 2006
Posts: 2,096
Likes: 0
. . .where you see the Central/South American Blazer/S10 with the 4.07L
MWM INTERNATIONAL Motores
One doesn't have to read Spanish or Portuguese to figure it out. . .
MWM INTERNATIONAL Motores
One doesn't have to read Spanish or Portuguese to figure it out. . .
Posting Guru
Joined: Jun 2006
Posts: 2,096
Likes: 0
. . .where you see the Central/South American Blazer/S10 with the 4.07L
MWM INTERNATIONAL Motores
One doesn't have to read Spanish or Portuguese to figure it out. . .
MWM INTERNATIONAL Motores
One doesn't have to read Spanish or Portuguese to figure it out. . .
I am curious as to this Powerstroke referance on the International website, to my knowledge no International website addressing the North American market has made a referance to "Powerstroke" since the 6.0 days.