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Old 12-07-2016, 06:03 PM   #1
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Default Horsepower v torque

It grinds my gears when people confuse this but it's understandable

torque for low down power
The ease of getting off the line
Torque is not that jolt you feel
Etc
Or any other explanation for this that confused torque for power at any situation
But it's understandable
Torque Is only a momentary force.
And can only be used as a measure of momentary force
Power is what moves you
Know a little physics and you'll understand this
While yes horsepower is torque over time
That time part is the key part
If you have tons or torque but it takes forever you'll have **** power
Vice versa
Hence why rotary engines can produce so high power numbers and insane acceleration with little torque
Time is key
Horsepower is a measure of energy
And if you know physics you know energy is what moves you
No if ands or butts
A more "torquey" engine will make more power down low and better average power
Hence the myth

But don't take my word for it
Maybe a engineer can tell you

https://youtu.be/X7KWtf4wqN4
https://youtu.be/UIQjyn95c-o

I hope this clears it up for anyone




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Old 12-07-2016, 09:24 PM   #2
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just look at diesels... low HP, massive torque..
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Old 12-07-2016, 09:26 PM   #3
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Quote:
Originally Posted by Natesriv View Post
just look at diesels... low HP, massive torque..


And slow as all hell


Energy is what moves you
Basic physics
It doesn't matter if that energy is all at once or over a longer time ( high torque vs low torque for same power)

It's still the same amount of energy put out
Still the same acceleration all things else the same

Please watch the videos
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Old 12-08-2016, 12:05 AM   #4
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HP is actually a calculation based on torque.

HP = torque x RPM / 5252
The last number is the reason HP and Torque lines on a dynograph cross at 5252 RPM.

But really, horsepower is a terrible unit to measure power with anyways. Long live the Kilowatt!
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Old 12-08-2016, 12:07 AM   #5
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Quote:
Originally Posted by Maddmatts View Post
HP is actually a calculation based on torque.

HP = torque x RPM / 5252
The last number is the reason HP and Torque lines on a dynograph cross at 5252 RPM.

But really, horsepower is a terrible unit to measure power with anyways. Long live the Kilowatt!


Yes
I know that
As said in my long winded terrible paragraph

The important part is the time aspect

Nah
I'll stick with my horse power

How about duck power though?


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Old 12-09-2016, 05:10 PM   #6
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Spark EV
140 hp / 327 ft lb

https://m.youtube.com/watch?v=UkT8rZj8YH0

Perfect lesson in torque. It's heavier than a Sonic, fun stuff.
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Old 12-20-2016, 12:18 AM   #7
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Seeing as how this is a Sonic forum - let's look at the two available engines - the 1.4T and the 1.8L.

Both engines have the exact same HP - 138.

The 1.4T has a torque rating of 148, the 1.8L has 125.

Which one is more enjoyable to drive and which one will accelerate faster. Hint - it's the same answer for both.

When I built the 462 ci engine for my GTO, I didn't care about the HP it made (as that will really only come in to play at higher speeds than I can legally drive on public roads - at 70 MPH I'm under 2700 RPM) but was more interested in the amount of torque it made.

The numbers, FWIW, are 450HP/550Torque.
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Old 12-20-2016, 12:20 AM   #8
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Quote:
Originally Posted by The Champ View Post
Seeing as how this is a Sonic forum - let's look at the two available engines - the 1.4T and the 1.8L.

Both engines have the exact same HP - 138.

The 1.4T has a torque rating of 148, the 1.8L has 125.

Which one is more enjoyable to drive and which one will accelerate faster. Hint - it's the same answer for both.

When I built the 462 ci engine for my GTO, I didn't care about the HP it made (as that will really only come in to play at higher speeds than I can legally drive on public roads - at 70 MPH I'm under 2700 RPM) but was more interested in the amount of torque it made.

The numbers, FWIW, are 450HP/550Torque.


Yes but you can't compare the two equally because the turbo has better average power
Hence the slightly better acceleration along with Better low end power

But power is the determining part in acceleration as well as weight

That's it

Torque is nice and will give you better average and low end power

But power itself is what moves you




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Old 12-20-2016, 12:10 PM   #9
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Quote:
Originally Posted by MyLonewolf25 View Post
Yes but you can't compare the two equally because the turbo has better average power
Hence the slightly better acceleration along with Better low end power
Both engines have the exact same "power" - 138 HP.

The difference is the torque.

0-60 time for the higher torque model is 7.8 seconds with the 1/4 time of 15.9.

The same HP, but lower torque engine is 8.9 seconds with a 1/4 time of 16.8.

Chevrolet 0-60 Times & Chevrolet Quarter Mile Times | Chevy Corvette, Camaro, Chevelle, Blazer & Nova 0 to 60 stats!

What's this "slightly better acceleration" that you're talking about?

A high HP/low torque engine can be a pain in the ass to drive.

A high torque/equal HP engine will be much more fun to drive and be faster for the majority of the legal driving speeds.

0-60 is something you use all the time - and more torque makes that more fun for the driver.

More HP will help you achieve a higher top speed. But we have speed limits in most areas which prevent the use of that higher HP for all intents and purposes.
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Old 12-20-2016, 12:14 PM   #10
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Quote:
Originally Posted by The Champ View Post
Both engines have the exact same "power" - 138 HP.



The difference is the torque.



0-60 time for the higher torque model is 7.8 seconds with the 1/4 time of 15.9.



The same HP, but lower torque engine is 8.9 seconds with a 1/4 time of 16.8.



Chevrolet 0-60 Times & Chevrolet Quarter Mile Times | Chevy Corvette, Camaro, Chevelle, Blazer & Nova 0 to 60 stats!



What's this "slightly better acceleration" that you're talking about?



A high HP/low torque engine can be a pain in the ass to drive.



A high torque/equal HP engine will be much more fun to drive and be faster for the majority of the legal driving speeds.



0-60 is something you use all the time - and more torque makes that more fun for the driver.



More HP will help you achieve a higher top speed. But we have speed limits in most areas which prevent the use of that higher HP for all intents and purposes.


Again
Confusing torque for power
Torque doesn't move you
It is only a momentary force and nothing more

BUT
Again a more "torquey" engine WILL produce more low end power and better average power


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