Horsepower vs Torque - A Visual Explanation
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- Опубліковано 8 лип 2024
- Today we go over why everything you think you know about horsepower and torque is WRONG!!
Jeremy Clarkson, Gale Banks, Carrol Shelby, & your grade school science teacher are wrong and we are here to prove it with this simple explanation.
#science #techtalk #ASMR #kcturbos
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➤ Chapters:
» 0:00 Introduction
» 0:20 Horsepower Wins Races?
» 0:50 What Is Torque?
» 2:07 What Is Horsepower?
» 2:29 Visual Example of Horsepower vs Torque
» 3:59 Horsepower vs Torque vs RPM Explanation
» 5:38 What About Nitrous?
» 6:18 Results
Finally a relevant torque vs. power video. I like to say it like this: in a vehicle with a transmission, engine torque as a number is irrelevant. Engine torque with an rpm attached is horsepower.
his analogy is incorrect. HP is not a measure of total energy spent. If you want that figure you need to convert HP to joules, or in other words, take your HP figure and multiply it by the time over which you try to measure absolute energy.
This video explains very little, and which it does, it does incorrectly so. As soon as you start talking about HP, you can't simply compare it with torque, since the engine isn't a stationary pump. To get to HP mathematically, you need to multiply NM with R/m (rpm), so you get NM x R / m. This gives you the rate of energy transfer, not total energy transferred. To get total energy you need to get rid of that /m (per minute) part.
"Sir, how far did you travel to get here"
"70mph"
@@meusana3681 the purpose of his video is to explain to the lamens the difference. It's not a physics video. It's not perfect, and he doesn't explain how you can do very little work with high torque at near zero rpm. But for the lamens who think torque is relevant, this is the kind of explanation they need.
@@0foxgiven Exactly! You are one of the few in the comments that actually get it.
Its a simplified version just to better under tq vs hp... there is even a direct chart at the end. The point is about what breaks parts and how parts like driveline, axles, etc actually don't care about HP, its tq they care about.
HP wins races
tq breaks parts
Transfer Case and Rear Diff know all too well what Torque does. I always keep my Converter locked as well. My Transfer case exploded... shrapnel severed a brake line and the rear diff shredded all of its gear teeth in one fell swoop. I think the 1300-1400Tq level is good for awhile. I am going to have to figure out where the big players get their Transfer cases etc from. The T-case was the best off the shelf I could get for the truck and it was what was already on the truck... so not expecting it to last.
Only thing that survived was the chain drive in the T-case which is stout as hell.
We have been using the factory 03-04 F350 transfer case and axles on our +1800hp 6.0 Powerstroke race truck and haven't had one fail yet! We are just shy of running a 4 second 1/8 mile at 4475#s with full time 4WD. Those are some stout parts!
The Germans picked gas engines for their tanks in WW2 over diesel because more torque means a need for thicker, heavier parts. With the higher RPM of gas engines, they could get the desired horsepower with lighter engines and drivetrains. A diesel would require much more part breaking, clutch destroying torque to produce the same hp at lower RPM.
Im sure it had nothing to do with oil shortage.
@@B0RN2RACE100 at the start of the war?
That was the greatest explanation ever.
great explanation🙌
Engine wise you are demonstrating cylinder pressure. Timing has a lot to do with parts breaking or a torque monster.
Its an analogy, trying to convey technical info to non-technical people is difficult, and requires analogies, this was a pretty good one.
@Chris-hn4lp I get it. I think it's good also. However speed of combustion doesn't really change, diesel burns at its own rate. Of course that's simplified also, but I'm sure you get that.
Hp is just torque at rpm
Yes... but they represent 2 different things.
A vehicle with 2000tq and 100hp is going to be slower and break more parts compared to a vehicle with 100tq and 200hp. That is the point of the video.
Your analogy is also incorrect. HP is an acute measurement, it only explains what's happening at 1 time frame, just like torque. If you actually want to measure to total energy input to get from point A to point B, you need to multiply HP by a factor of time again to get to joules.
Or mathematically put, when you multiply torque with rpm, you actually multiply the number, but the unit gets divided by the "pm" part of rpm. So HP is N.M.R/M. Multiply by a factor of time again and you actually get an absolute measure of energy spent a.k.a. NMR, which is a count of revolutions at a given torque. Or what you demonstrated with the 10 soft hits of the cup.
Also your analogy for torque is incorrect, that's analogous to cylinder pressure, the impulse of the swing is like having detonation, the momentum of the thing you are swinging would be the torque. Hits per minute would be your HP, distance traveled = work done = joules = hp x time.
UA-cam experts have gotten so watered down, it's not even funny anymore. Nor is it fun to poke holes all the time.
Its a simplified version just to better under tq vs hp... there is even a direct chart at the end. The point is about what breaks parts and how parts like driveline, axles, etc actually don't care about HP, its tq they care about. You can have a ton of cylinder pressure and not make any extra tq... so that is not the focus. You can add timing wrong, spike cylinder pressures, and actually make less tq.
HP wins races
tq breaks parts
cylinder pressure is also bad... but that is not the point of the video.
Weight and tire size....
Weight and tire size is irrelevant to this discussion.
Horsepower is just a measurement of torque. No?
It’s a function of torque
It's a measure of torques per second. This sounds like a joke, but it isn't. This is why 90s F1 cars rev so high, they can wring a lot of power out of a small amount of torque, while keeping the engine components small and light, since they don't need to handle much torque.
Horsepower is the derivative of torque. Like mentioned above, it’s Force and displacement over time, or N • m / s
No, they are related, but not the same. If something has tons of torque, with minimal horsepower, it will be useless no matter what, no amount of gearing will change that. On the other hand, if something has tons of horsepower, but minimal torque, then it will be extremely fast, as long as you use an appropriate transmission / gearing.
@@Chris-hn4lp I would like to argue that an engine with a ton of torque and little hp will also be very fast with the right gearing.