Cummins vs PowerStroke vs Duramax HP/Torque Curves

[DCoxon]

This graph was generated using the published data from GM, Ford and Dodge for the LMM Duramax, 6. 4PowerStroke, and 6. 7Cummins.

The Torque curves were carefully plotted, and the HP generated by the 5252 calculation.



This bought up some interesting results, and showed that GM and Dodge (and probably Ford, but it wasn't as obvious) use some ‘Artistic License' in creating these hp/torque plots they publish.



As an example - the 365 peak hp of the LMM is a bit optimistic given that the torque looks to be closer to 590lb ft than the 600lb ft that'd actually be needed to generate 365hp at 3200rpm….



The Cummins torque can be seen to fall sharply before 2900rpm, but somehow makes peak hp at 3000rpm… All very strange!



Anyway - I did this to collate data for something else I'm currently working on. I figured it was interesting enough to publish here. I'll allow you all to make your own decisions / judgements on how realistic the data actually is… :-laf





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[PLanciers]

Not to diminish the work you put in here but I think this depiction and the data contained within would pop better if you stuck to 3 colors Dodge, Ford and Chevy and diferentiated Horspower vs, torque by segmented/solid lines.

My pea brain has difficulty tracking six colors simutameously, just a HSI thought...

Pete

 

[DCoxon]

Good point!



Blue for Ford,

Red for Dodge,

hmmmm, what colour for GM?



LOL!

 

[PLanciers]

Yellorrrr!

 

[DCoxon]

Duuuuuun ;-)

 

[Gary - K7GLD]

WELL, my 70 year old brain followed it with no problem - no LSD (the drug), Pot or alcohol in my past mighta helped! :-laf



Nice graph, nice and very informative info - that Duramax looks pretty good on paper...

 

[tgrfan2]

Thanks for the info. It shows why to be a "Tow Boss" you have to be wound pretty tight. I haven't driven the 07s but my experience with an 06 "Z" and 06 CTD indicates they are very close on usable torque and power with the D/A having an advantage only in transmission control and operation. Fuel economy is where the CTD has the advantage.

 

[Neibe]

They can draw all the lines they want to but in the real world we know. I friend of mine got into an arguement with a D-max Isuzu owner. He has a Dodge Cummins they both had 125hp add on chips. So they hooked them up bumper to bumper and put $100 on it. So the Dodge pulls the D-max Isuzu backwards and stops now the Isuzu is mad so he pulls the Dodge about 1/4 mile with the Dodge brakes on. So they do it again same thing the Dodge had his way with the Isuzu. I believe the inline 6 is the reason they can have the same hp same torque and the inline 6 will outpull them all.

 

[robertyoke]

They can draw all the lines they want to but in the real world we know. I friend of mine got into an arguement with a D-max Isuzu owner. He has a Dodge Cummins they both had 125hp add on chips. So they hooked them up bumper to bumper and put $100 on it. So the Dodge pulls the D-max Isuzu backwards and stops now the Isuzu is mad so he pulls the Dodge about 1/4 mile with the Dodge brakes on. So they do it again same thing the Dodge had his way with the Isuzu. I believe the inline 6 is the reason they can have the same hp same torque and the inline 6 will outpull them all.

It's more of a weight or weight transfer thing, than a hp thing.

the heaver rig has an advantage. If you hook your truck higher than the other truck then you will transfer some of his weight to you and you will pull him.

-robert

 

[Neibe]

It's more of a weight or weight transfer thing, than a hp thing.

the heaver rig has an advantage. If you hook your truck higher than the other truck then you will transfer some of his weight to you and you will pull him.

-robert

Reese hitch to reese hitch how much difference could that make!

 

[Giachino]

If they were both stock height, the dodge has a several inch rear height advantage... .

 

[Foil Freak 1211]

I know that the CTD is the superior engine, but isn't a match like that as much about traction as anything else?