HP vs Torque

Here is the deal. Torque is just one factor in making power. Combine it with speed and you have horsepower, or the the amount of work accomplished in a specific amount of time. From the encyclopedia, "a unit of power equal to 550 foot-pounds per second" Torque and time. Neither is king. Modern engines are compromises of power, speed, and economy. Taking a week to get to the top of the hill makes no more sense than running a engine at 10,000 rpm to move down the road.

I think that a lot of the confusion about power and torque arise from the fact that many years diesels were marketed to commercial users who wanted to know how much usable power they had and were smart enough not to fall for lies. The carmakers got away with all sorts of games rating gas engines. Even today in every dyno test that I have seen comparing the two the diesel gets much closer to its rated power than the gas engine. The diesel sometimes even exceeds its rating. I am convinced that there is something going on with the relative ratings systems. I was looking at portable band saws a while back and the literature advised that the saw needed about a 20hp electric motor, or a 30hp diesel or about a 40hp gas engine to operate well. There is no reason for this other than the ratings systems used. Another factor is that gas engines are designed to use more RPM to deliver the power. I have found high RPM to be unpleasant so I never get rated power from the gas engines that I have owned. However, the newer engines are much smoother and less objectionable to listen to at rated speeds so they are getting better.

Bottom line is that for a given tire size it is the torque AT THE DRIVE TIRES that make you move. The tire DOES NOT KNOW if the torque is coming from a diesel turning 1800rpm in 6th gear or a gas engine turning 6000rpm in 2nd gear. Either way it is power divided by speed gives you thrust. My diesel tractor has tremendous thrust at 3mph but my gas truck will easily outpull it at 20mph.

Chuck_thehammer wrote:
130 years.. and still.. little understanding.

20 mule team borax vers 4 horse stagecoach .

:B :p :B Thanks for the great response.

Turtle n Peeps wrote:

1stgenfarmboy wrote:

agesilaus wrote:
I put the hammer down on my Hemi 6.4 and even with the trailer hitched, I get pressed back in the seat a little, not as much as when I'm unhitched, and nothing like the Corvette which had a smaller engine
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You can look at YouTube and see unmodified Ford 6.7's beating muscle cars in short drag races: Youtube

There are a lot more like it. There is a button on the dash that when in the normal position prevents you from laying a down trail of rubber. Forget what it's called-Traction Control? I'd rather not leave a 1/4 inch if those expensive tires behind so I haven't tried it.

Your Ram may be the same.

If you really think that truck is unmodified I have some oceanfront property for sale in IL.

It's DPF must be broken! :B

(1.) Modified (2.)Ford 6.0 with (3.)no traction control. Next batter.

130 years.. and still.. little understanding.

20 mule team borax vers 4 horse stagecoach .

Diesel is only powerful in modern trucks because of..... turbo... I'm sure many of you recal the non turbo diesel days..... that's my take. Either way a truck is going to perform the way the engine is designed to work. Both gas and diesel have advantages and disadvantages. The HP/TQ, gas/diesel wars will never end...

1stgenfarmboy wrote:

agesilaus wrote:
I put the hammer down on my Hemi 6.4 and even with the trailer hitched, I get pressed back in the seat a little, not as much as when I'm unhitched, and nothing like the Corvette which had a smaller engine
---------------------------------------------------------------------

You can look at YouTube and see unmodified Ford 6.7's beating muscle cars in short drag races: Youtube

There are a lot more like it. There is a button on the dash that when in the normal position prevents you from laying a down trail of rubber. Forget what it's called-Traction Control? I'd rather not leave a 1/4 inch if those expensive tires behind so I haven't tried it.

Your Ram may be the same.

If you really think that truck is unmodified I have some oceanfront property for sale in IL.

It's DPF must be broken! :B

Stock 6.7 PS acceleration times
Not bad actually


Hellcat acceleration times from Car and Driver

C/D TEST RESULTS:
Zero to 60 mph: 3.6 sec
Zero to 100 mph: 7.6 sec
Zero to 130 mph: 12.4 sec
Rolling start, 5-60 mph: 4.0 sec
Top gear, 30-50 mph: 1.8 sec
Top gear, 50-70 mph: 2.4 sec
Standing ¼-mile: 11.7 sec @ 126 mph

Pretty close to the car in the video.

agesilaus wrote:
I put the hammer down on my Hemi 6.4 and even with the trailer hitched, I get pressed back in the seat a little, not as much as when I'm unhitched, and nothing like the Corvette which had a smaller engine
---------------------------------------------------------------------

You can look at YouTube and see unmodified Ford 6.7's beating muscle cars in short drag races: Youtube

There are a lot more like it. There is a button on the dash that when in the normal position prevents you from laying a down trail of rubber. Forget what it's called-Traction Control? I'd rather not leave a 1/4 inch if those expensive tires behind so I haven't tried it.

Your Ram may be the same.

If you really think that truck is unmodified I have some oceanfront property for sale in IL.

agesilaus wrote:
I put the hammer down on my Hemi 6.4 and even with the trailer hitched, I get pressed back in the seat a little, not as much as when I'm unhitched, and nothing like the Corvette which had a smaller engine
---------------------------------------------------------------------

You can look at YouTube and see unmodified Ford 6.7's beating muscle cars in short drag races: Youtube

There are a lot more like it. There is a button on the dash that when in the normal position prevents you from laying a down trail of rubber. Forget what it's called-Traction Control? I'd rather not leave a 1/4 inch if those expensive tires behind so I haven't tried it.

Your Ram may be the same.

Un modified 6.7 doing a sub 12 second 1/4 mlle. Ya right. 4wd would give the truck a big advantage off the line but the car had a higher trap speed.