Gas vs PSD
Senior User
Joined: Sep 2004
Posts: 116
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Different dynos, different conditions, different operators. Not at all a reliable comparison. I think the 5star dyno is a Mustang dyno instead of the Dynojet, which would make them even more different.
I'd love to see a comparison of a stock 3V V10, 6.0, and even a 6.4 on the same dyno, though.
Postmaster
Joined: Apr 2006
Posts: 3,524
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From: CA Bay Area
1 HP=3/4 kW
1 mph=1.6 kph (all rounded up).
Now converting mpg into liters/100 kilometers is more complicated.
As well as telling if 36/64" is bigger than 9/16
Elder User
Joined: Apr 2009
Posts: 685
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From: Spokane, WA
Different dynos, different conditions, different operators. Not at all a reliable comparison. I think the 5star dyno is a Mustang dyno instead of the Dynojet, which would make them even more different.
I'd love to see a comparison of a stock 3V V10, 6.0, and even a 6.4 on the same dyno, though.
I'd love to see a comparison of a stock 3V V10, 6.0, and even a 6.4 on the same dyno, though.
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
The 5 Star dyno is a Dyno Dynamics which hp and tq numbers are around 15% lower than a Dynojet's numbers.
Elder User
Joined: Apr 2009
Posts: 685
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From: Spokane, WA
http://dieselpower.automotive.com/13...sel/index.html
This was refuted last time it was posted, guess some people had an issue in that it was a diesel magazine.
This was refuted last time it was posted, guess some people had an issue in that it was a diesel magazine.
Senior User
Joined: Sep 2004
Posts: 116
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Cargo Master
Joined: Jan 2005
Posts: 2,413
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Don't really know what your trying to say here but 36/64=9/16. That's not hard at all to "tell" Here in America we're taught early on to reduce down. Shoulda used something like 14mm >=<9/16.
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Cargo Master
Joined: Jan 2005
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http://dieselpower.automotive.com/13...sel/index.html
This was refuted last time it was posted, guess some people had an issue in that it was a diesel magazine.
This was refuted last time it was posted, guess some people had an issue in that it was a diesel magazine.
Lead Driver
Joined: Jan 2002
Posts: 8,653
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From: Itinerant
2008 Ford Super Duty F-250 | Diesel Power Magazine Article at Automotive.com
This was refuted last time it was posted, guess some people had an issue in that it was a diesel magazine.
This was refuted last time it was posted, guess some people had an issue in that it was a diesel magazine.
Now the article...if they would have just stated the facts in stead of adding their personal thoughts and insecurities it would have been a much better read. They have to keep the DSL propaganda machine rolling for their readers I guess.
Senior User
Joined: Oct 2009
Posts: 281
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From: West TN
Senior User
Joined: Feb 2006
Posts: 257
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From: Kingsland, GA
Power has only one definition: Power = Force x Distance / Time
Horsepower is a specific unit of measure of power, and also has only one definition: 1 HP= 550 lbs x 1 ft / 1 sec. Something that produces one horsepower is capable of lifting 550 lbs one foot in one second.
There are many ways to measure power, just like there are many ways to measure torque, and with both, some ways are more accurate than others. However, there is only one way to calculate power.
Its meaning has not been reduced over the years, and if you think its only good for bragging, then you don't understand what it means.
Horsepower is a specific unit of measure of power, and also has only one definition: 1 HP= 550 lbs x 1 ft / 1 sec. Something that produces one horsepower is capable of lifting 550 lbs one foot in one second.
There are many ways to measure power, just like there are many ways to measure torque, and with both, some ways are more accurate than others. However, there is only one way to calculate power.
Its meaning has not been reduced over the years, and if you think its only good for bragging, then you don't understand what it means.
In the context we are discussing (automobiles in the US), it has one definition. As the wonderful wikipedia says for "mechanical" horsepower,
1 HP ≡ 33,000 ft·lbf/min by definition
= 550 ft·lbf/s
Drawbar horsepower has the same value, and electrical horsepower is defined as being 0.04% higher.
All of the other "horsepowers" listed there are different units of measure, as indicated by their names and abbreviations.
I challenge you to show me one calculation of horsepower, in the context we are discussing, that is not a combination of force, distance, and time.
1 HP ≡ 33,000 ft·lbf/min by definition
= 550 ft·lbf/s
Drawbar horsepower has the same value, and electrical horsepower is defined as being 0.04% higher.
All of the other "horsepowers" listed there are different units of measure, as indicated by their names and abbreviations.
I challenge you to show me one calculation of horsepower, in the context we are discussing, that is not a combination of force, distance, and time.
Good to see you know what you are talking about.
Now for the kicker... How do you measure horsepower, excuse me, how do you measure mechanical horsepower?
Cargo Master
Joined: Jan 2005
Posts: 2,413
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I personally couldn't give a hoot what a person drives, hell if a rickshaw can haul your groceries or firewood have at it.
Now the article...if they would have just stated the facts in stead of adding their personal thoughts and insecurities it would have been a much better read. They have to keep the DSL propaganda machine rolling for their readers I guess.
Now the article...if they would have just stated the facts in stead of adding their personal thoughts and insecurities it would have been a much better read. They have to keep the DSL propaganda machine rolling for their readers I guess.
I think the testers personual imput was very informitive. It shouldn't that going into the test the 6.4 could be the underdog. Their imput showed that based on the facts it comes down to what you value in a truck and what you plan on using your truck for.
Postmaster
Joined: Apr 2006
Posts: 3,524
Likes: 2
From: CA Bay Area
Working in metric I know right away that 19 mm wrench is bigger than 17 mm and 2 mm drill bit is smaller than 3 mm.
In SAE comparing 41/64 to 5/8 is not so easy as well comparing 3/64 to 0.225".
USA was converting to metric about 30 years ago. What happened to this idea?