Powerstroke vs Competition
Fleet Mechanic
Joined: Feb 2001
Posts: 1,290
Likes: 15
From: Toronto, Canada
Powerstroke vs Competition
When people look at hp and torque ratings, they tend to look only at the number and not at how many revolutions the peaks are at.
And as far as diesels go, it is even more important at what rpm's the peaks are at, as the governed rpm is low.
In the case of the duramax, the hp peak is at 3100 rpms, very high rpms for a diesel.
If you look at the numbers, the powerstroke is the best engine.
As well, the truck that these engines are in count (weight). The gm is unfairly advantaged by having no front suspension like the real truck, the ford!
Look at all the facts people!
Thanks!
Duramax 6600 Ford Powerstroke Dodge Cummins
Hp 300 @ 3100 275 @ 2800 245 @ 2700
Torque 520 @ 1800 520 @ 1600 505 @ 1600
https://www.ford-trucks.com/dcforum/User_files/3ae0a7e34062b4ad.jpg https://www.ford-trucks.com/dcforum/User_files/3ae0a7b33fe32dbb.jpg
1978 F250 4x4 - 351M
Don't crush them, restore them!
And as far as diesels go, it is even more important at what rpm's the peaks are at, as the governed rpm is low.
In the case of the duramax, the hp peak is at 3100 rpms, very high rpms for a diesel.
If you look at the numbers, the powerstroke is the best engine.
As well, the truck that these engines are in count (weight). The gm is unfairly advantaged by having no front suspension like the real truck, the ford!
Look at all the facts people!
Thanks!
Duramax 6600 Ford Powerstroke Dodge Cummins
Hp 300 @ 3100 275 @ 2800 245 @ 2700
Torque 520 @ 1800 520 @ 1600 505 @ 1600
https://www.ford-trucks.com/dcforum/User_files/3ae0a7e34062b4ad.jpg https://www.ford-trucks.com/dcforum/User_files/3ae0a7b33fe32dbb.jpg
1978 F250 4x4 - 351M
Don't crush them, restore them!
Senior User
Joined: Mar 2001
Posts: 379
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Powerstroke vs Competition
I'm glad I'm not the only one who see's these things. If you think that's bad look at their gas engines. The torque peak on most of those things is at 4000 rpm! That's stupid. Torque is need down low for pullin' not at 4000rpm.
"Like a Rock"; on the sides of roads everywhere.
"Like a Rock"; on the sides of roads everywhere.
Senior User
Joined: Feb 2001
Posts: 381
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Powerstroke vs Competition
That is the dumbest thing I have ever seen posted. If you really want a good compariosn compare the hp at the same rpm, simply because the duramax gets 300 at 3100 doesnt't mean it gets 0 at 2800, it could even get more hp at 2800. All that shows is that there really isn't a peak in the hp untill you really get the rpms up high.
Logan
Logan
Fleet Mechanic
Joined: Feb 2001
Posts: 1,290
Likes: 15
From: Toronto, Canada
Powerstroke vs Competition
Well logan, thanks!
The duramax makes 520 lb-feet at 1800, where the ford makes the same at 1600. Which will pull more better?
With the hp and torque at higher rpms, the more time your ##### is sitting on the side of the road, with the chevies!
https://www.ford-trucks.com/dcforum/User_files/3ae0a7e34062b4ad.jpg https://www.ford-trucks.com/dcforum/User_files/3ae0a7b33fe32dbb.jpg
1978 F250 4x4 - 351M
Don't crush them, restore them!
The duramax makes 520 lb-feet at 1800, where the ford makes the same at 1600. Which will pull more better?
With the hp and torque at higher rpms, the more time your ##### is sitting on the side of the road, with the chevies!
https://www.ford-trucks.com/dcforum/User_files/3ae0a7e34062b4ad.jpg https://www.ford-trucks.com/dcforum/User_files/3ae0a7b33fe32dbb.jpg
1978 F250 4x4 - 351M
Don't crush them, restore them!
Posting Guru
Joined: Feb 2001
Posts: 1,465
Likes: 2
From: Indianapolis
Powerstroke vs Competition
These higher RPM engines are a thing of the future. I'm not sure I agree with it but they didn't ask for my opinion. The new Power Stroke, set to start production next year for the 2003 model year will also be a faster running engine with the torque and horse power higher up in the RPM band.
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Senior User
Joined: Feb 2001
Posts: 381
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Powerstroke vs Competition
Which will pull more better? There is a little problem with you question(actually a BIG problem). You see, you need to find out what the shape of the hp/torque curve is before you can make ANY decision. Your trying to rate 2 comepletley different engines using only 2 numbers, equal torque at differnt RPMs shows ALMOST NOTHING at all. To get a good comparison you need to now torque AT THE SAME RPM. You also need to know which has a steeper torque curve. When the torque cure is really steep, then the engine can probbably make a lot less torque AT THE SAME RPM in comparison to another engine.
You need A LOT more numbers before you can say that OVERALL the PSD is a better engine than the Duramax.
Logan
You need A LOT more numbers before you can say that OVERALL the PSD is a better engine than the Duramax.
Logan
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Fleet Mechanic
Joined: Feb 2001
Posts: 1,290
Likes: 15
From: Toronto, Canada
Powerstroke vs Competition
Well I will have to thanks you guys for showing my bias!
I guess that you are right that torque and hp curves are needed to compare the engines.
Very good point!
One of the main points of my post is that I dislike the higher rpms that newer engines are spinning.
Chevy seems to be especially like this. My opinion is that these engines are creating non usable power as their torque and hp peaks are so high. No one is going to run their engine at 5400 rpm's to get the peak torque out of their engine.
One thing that Ford seems to be able to do is create engines that still have some low end torque, what trucks are made for!
90% of the 5.4 and 6.8's torque is avalable under 2000 rpms.
Historically, from what I've heard a chevy is faster, but put equal load on a ford and a chevy, and the chevy will be completely useless.
https://www.ford-trucks.com/dcforum/User_files/3ae0a7e34062b4ad.jpg https://www.ford-trucks.com/dcforum/User_files/3ae0a7b33fe32dbb.jpg
1978 F250 4x4 - 351M
Don't crush them, restore them!
I guess that you are right that torque and hp curves are needed to compare the engines.
Very good point!
One of the main points of my post is that I dislike the higher rpms that newer engines are spinning.
Chevy seems to be especially like this. My opinion is that these engines are creating non usable power as their torque and hp peaks are so high. No one is going to run their engine at 5400 rpm's to get the peak torque out of their engine.
One thing that Ford seems to be able to do is create engines that still have some low end torque, what trucks are made for!
90% of the 5.4 and 6.8's torque is avalable under 2000 rpms.
Historically, from what I've heard a chevy is faster, but put equal load on a ford and a chevy, and the chevy will be completely useless.
https://www.ford-trucks.com/dcforum/User_files/3ae0a7e34062b4ad.jpg https://www.ford-trucks.com/dcforum/User_files/3ae0a7b33fe32dbb.jpg
1978 F250 4x4 - 351M
Don't crush them, restore them!
Senior User
Joined: Jun 2000
Posts: 464
Likes: 0
Powerstroke vs Competition
I agree whole heartedly with Logan_85. To compare two engines you need to show torque and horsepower curves via a line graph. This is the best way to determine, at least on paper, which engine is the better engine. Why is it that engines these days are running at higher rpms. If the engine is made or harder materials this isn't much of a problem. However low rpms would lead one to believe the engine would last longer. I wonder if I didn't shorten my 300-6s life span by installing 4.10s over 3.31s. If it does I just rebuild it and rebuild it better than Ford did! 
1994 Ford F150
300-6
Highly Modified and more to come!
1994 Ford F150
300-6
Highly Modified and more to come!
Posting Guru
Joined: Feb 2001
Posts: 1,465
Likes: 2
From: Indianapolis
Powerstroke vs Competition
They are designing these new higher RPM diesels to be "more car like" having characteristics more like a gasoline engine (don't ask me why). Torque gets the work done. Horse power adds a time factor to the equation (torque times RPM devided by 5252 equals horse power). So, as you can see, if you can maintain torque at a higher RPM you automatically have more horse power even though you haven't accomplished anything except moving the torque higher up in the RPM band. I believe it has something to do with reducing stress on the transmission, particularly automatic transmissions, but I don't have any facts to back up that assertion. Your guess is as good as anybody else's.
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