SkiDood
Peoples Republic of Minnesota
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Thread necromancy....
I've been looking at these numbers and reading some stuff. I'd bet they dyno'd the 6.7 in od2 or 6th gear, a double overdrive. The 5.9 is 1 to 1 in fourth gear, its top gear with the 48re. They would have had to dyno the 6.7 in fourth gear as well, that is the 1 to 1 ratio on the 68re.
Hmmmm.
More reason I no longer subscribe.
Still a pretty good showing for the ole 5.9. I'd bet the 2 engines are alot closer in power than most people think.
Late model wife
2002 Daughter
2005 Daughter
2007 Ram 3500srw 5.9L Cummins Laramie. QC Short bed.
2008 Crossroads Zinger 30RB 5th wheel.
18k Reese signature series slide hitch
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ib516
Up here!
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SkiDood wrote:Thread necromancy....
I've been looking at these numbers and reading some stuff. I'd bet they dyno'd the 6.7 in od2 or 6th gear, a double overdrive. The 5.9 is 1 to 1 in fourth gear, its top gear with the 48re. They would have had to dyno the 6.7 in fourth gear as well, that is the 1 to 1 ratio on the 68re.
Hmmmm.
More reason I no longer subscribe.
Still a pretty good showing for the ole 5.9. I'd bet the 2 engines are alot closer in power than most people think.
The 48RE is 1:1 in 3rd gear. 4th is 0.69:1. Either way, I can't wait to read the article. I have the magazine at home, but haven't got to it yet.
2004 Cougar 301 BHS 6580# Dry, 9000# wet, 9600# GVWR)
2007 Dodge/5.9L Cummins 3500 SRW Megacab 4x4/3.73
Hypertech Max Energy
"MEGACASPER" 10100# GVWR, 5200# FGAWR, 6200# RGAWR
PICTURES
ELIM 3000 Gen (still going )
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coolbreeze01
Redding, Ca
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If I had another 100 horses, I couldn't keep tires on my truck 
2008 Dodge 3500 CTD LB SRW 4X4 6-Speed Auto
P3 Blue Ox Sway Pro
2007 Komfort 212
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bandmjdavis
Virginia
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Joined: 08/29/2006
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I have owned both and disagree with the numbers as well. The 6.7 feels far superior for towing, especially with the 6 speed trans and engine brake.
'05 Keystone Spningdale with Bunkhouse
'07 Dodge Ram 2500 CTD SRW 4X4
3 Happy Campers 
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pronstar
The LBC
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Wish I had an exhaust brake and 6-speed automatic on my 5.9...
2007 Dodge Ram 2500 CTD 4x4/QC/LB
2008 Stellar 23' Toy Hauler
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davelinde
Freehold, New Jersey
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Joined: 11/02/2003
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So I skimmed the article on the rack... iirc the tires were different on the two trucks, but they swapped them and did a run too. I did find the numbers odd given the reaction of people who have towed with both.
One anecdote... they mentioned that they sent the 6.7 out to have the pyro installed as they could not SEE the manifold. I guess that engine compartment is a bit packed?
The thing it reminded me about is that my cat-less dpf-less plain old 04.0 has some advantages. It also got me thinking about the possibility of adding a performance exhaust turbo-back (since I can)
Dave Lindemulder
Tammy, Mark & Kirsten
04 Dodge 2500 4x4 SLT QC/SB
HO-CTD/48RE - Graphite: Raptor SS nerfs, Prodigy, Reese 16K Kwik-slide, BD X-Monitor, PML Trans pan, PML Diff cover, Firestone Airbags
09 Heartland Cyclone 3210
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ib516
Up here!
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The Duramax 2008 LMM is also down on power (slightly) when compared to the 2006 LBZ.
2006 LBZ Duramax - 318hp/557tq
2008 LMM Duramax - 302hp/541tq
Ford seems to have actually improved performance on the 6.4L as compared to the 6.0L.
2006 6.0L PSD - 296hp/473tq
2008 6.4L PSD - 306hp/529tq
For the Dodge/Cummins, the results show as follows, with the 6.7L making slightly more power than the 5.9L did:
2006 5.9L Cummins - 287hp/521tq
2008 6.7L Cummins - 304hp/529tq
All of the above were taken for the "stock" rear wheel chassis dyno curves posted on Hypertech's website.
http://www.hypertech.com/
As much as I enjoy reading 'Diesel Power' magazine, I'd put more faith in Hypertech's numbers than the ones in the magazine.
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ib516
Up here!
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One thing that struck me as I read my own post - how similar the numbers are. Competition is tight among the big 3 diesels!
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