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Torque vs horsepower

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Thread replies: 93
Thread images: 25

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Why do people in the auto enthusiast community talk about horsepower when torque is the thing that actually matters. Is it because i'm an engineer and actually understand physics?
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>>15975757

Low quality bait.

As a physicist, I'm telling you to shut the fuck up and keep on studying until you see why you are wrong.
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>>15975757

you can have all the torque you could ever want but unless it's spinning and making horsepower, it does nothing
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>>15975784
Hypothetically, couldn't a very slow, high torque force be put through gears and made normal speed and force?
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>>15975784
>You can have all the hp you want but if you have to rev to 9k to get there then it does nothing.
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>>15975802
yes but it has to be spinning, meaning it's making horsepower
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>>15975805
> let's change a 100% factually true statement to one thats completely wrong and watch everybody believe me

> t. scared to rev
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>idiots WILL reply to this

A large displacement high torque mid-high hp engine and a small displacement low torque high hp screamer both have their place in performance. This thread is garbage.
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>>15975825
the first one has it's place in moving stuff
the second has it's place in performance
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>>15975832
Once you get to a certain power level any engine that fits the bill works because at that point weight starts to become an advantage again, making the car easier to drive. Then having more displacement to work with lets you run less boost if you're running them at all and/or less compression, which is desirable for a road car. Alternatively you can keep throwing boost and compression at the smaller-displacement engine to save a bit of weight but you may start to run into a very noticeable boost-threshold issue that many "dyno queen" builds experience where the driver is waiting for the turbos to spool, and is forced to run octane booster or E85, etc.
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>>15975863
yeah im just shitposting dont worry m8
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>>15975757
>i'm an engineer

Do you suck dick?
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>>15975784
Of course, when cars made 200 ft lbs of torque and 20 horsepower but somehow they were still able to reach 100mph?
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torque wins races
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>>15976321
are you literally retarded? i'm saying that without any spinning motion you can't move a car cause you aren't making any power.
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>>15975775
As a molecular engineering I agree with this.
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>>15976337
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>>15976545
oh wow two fucking seconds
how about you measure how much actual fun and engagement you have in a lap
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>>15976560
Stay triggered
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>>15975784
>>15976337
>>15975757
>Power is Torque x RPM x 2 x Pi
(sorry if the formular is wrong trying to translate from german)

You cant compare Power and torque because they belong together retards
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>>15975757
hp directly depends on torque you tard.
hp = torque x rpms / 5252
more torque gives more hp.
higher rpms also give more hp.
The total power output is what matters because it all goes through the transmission giving you variable speed/torque at the wheels.
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>>15976631
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>>15976654
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>>15976657
Stay triggered
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>>15976679
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>>15976688
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>>15976697
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>>15976702
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>>15976705
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>>15976709
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>>15976713
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>>15976716
>fake lap times
>implying the corvette can complete a lap without exploding
Stay BTFO
>>
Let's settle this once and for all:

All that matters for max acceleration force on the car is horsepower, because horsepower is a product of rotational force and rotations per second and as such is the only property of motion that's invariant to transmission gears. If you have a 3:1 gearing you get 3x less RPMs and 3x more force. The HORSEPOWER stays the same. So an engine producing 300 HP at the crank outputs 300 HP at the wheels in an ideal case (no transmission losses). Whatever actual force that amounts to at the wheels (the thing you feel as a push) is then determined by the rotational speed of the wheels. If you're outputing 300 HP at 30 mph you get a strong push (for instance at the top of 1st gear).

But what people are actually talking about when talking about torque - especially torque of diesel or petrol turbo engines is the distribition of torque or horsepower through the rev range of the engine - namely the fact that turbo engines provide full on torque at very low RPM whereas a naturally aspirated engine usually (without intake tricks and VVT) provides max torque at 4500 rpm. That means that the HORSEPOWER distribution of a turbo engine is different - at low RPM a turbo engine already produces significant HORSEPOWER. So when comparing a turbo engine with max horsepower of say 200 HP and a naturally aspirated engine with 200 HP, the first one (which has a larger torque figure) perhaps already achieves 100 HP at 2000 RPM, while the second one produces that at 3500 RPM. So at 2000 RPM the torquier engine is (not only feels) perhaps 50% stronger = outputs more power. The thing is it's not peak horsepower drivers are interested in (unless you like having revs around 4000-6000 constantly), it's the horsepower lower in the rev range that matters for daily driving. And that is often not indicated or is indicated in a greater torque number.

Credentials: I studied physics.
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hes sooo mad lel
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>>15976702
>and using a different damper calibration
Roflmao literally has to be fine tuned to beat a factory bone stock gtr
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>cuck is so triggered he won't even reply
Glad to see i'm still king of this board
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>>15976744
Leave him alone the WiFi in the gm dealership recall/warranty room is poor quality
>just like their vehicles
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>>15976752
Okay, okay. I'll stop
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>>15976744
>nu male's sky

He's bringing out the heavy guns
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>>15976790
Stay triggered
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>>15975775
As a mathematician I disagree with you
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>>15975757
>only buy tractors
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>>15975775
As a redditor, I'm starting my sentence with a title or position to give myself some sort of credibility, and then I'll follow through with some stupid remark or unsourced claim. Upvotes to the left xD
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>>15975807
Well it wouldn't have any torque either if it wasn't spinning ya donut
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>>15976841
False, you can have torque without anything spinning
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>>15975775
As a rocket scientist, fuck you.
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>>15976833
>if I don't like the joke it must have came from reddit
>everything I don't like is from reddit especially the cars
Maybe if you applied yourself instead of being a jealous NEET you would have a profession/title/job
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>>15976863
No you can't you fucking retard
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>>15976877
>projecting

stay BTFO, nerd
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>>15976897
I'm not projecting, I actually went to uni and got a job.

Hope you finally cleared the CEL on your shitbox. maybe in a year or two you'll upgrade that miata of yours
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>>15976904
>literally projecting harder than before
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>>15975757
Q: How do you know someone is an engineer?
A: They tell you.

This thread is bad and OP should feel bad.
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>>15976907
Yeah I'm literally using a projector as a monitor so I can show all my colleagues the magnitude of your butthurt.
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>>15975757
As a fellow engineer, you need to learn how logic works.
Your second sentence has literally shit all to do with the first.
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Horsepower is all that matters
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>>15976916
stay BTFO, nerd

let me know when you finally get some pussy and then you can sit at the grownups' table
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>>15975757
RPM > TORX
>>15976337
>pigfat
>cantturn
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>>15975832
>the first one has it's place in moving stuff
Yeah, like a car
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>>15976570
Of course you can't compare power and torque, you use torque to compare power. If you have two engines that each output a maximum of 300 lb-ft, however one engine makes that torque 2,000 rpm higher than the other, it will have more power.
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>>15976545
>>15976631
>>15976654
>>15976657
>>15976679
>>15976688
>>15976697
>>15976702
>>15976705
>>15976709
>>15976713
>>15976716
>>15976719
Why do threads here always devolve into this autistic circle-jerk faggotry? Do you tards not realize how stupid you look?
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>>15977150
>damage control

LOL
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>>15977150
Its all prez/o/'s fault. You can tell he knows exactly how to trigger people in the worst possible way, then he just leaves them hanging at the peak of their butthurt.
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>>15976716
>Chevrolet Corvette Stingray Z06 was noticeably faster
>in this big book of bedtime stories as published by GM
>>15976719
Fan girls need something to cling to I guess, even if it's a fictional story.
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>>15976889
Literally says right there that Torque is a function of Force and distance from the pivot point.
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>>15975757
Friendly reminder to everyone that an M1 Abrams tank weighs 60 tons and can accelerate to 45 MPH using its 1500 HP, 366 ft-lbs gas turbine engine.
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>>15976722
This is one of the best explanations I've read. Bravo.
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>>15976722
So in effect, would the area under a horsepower curve be more important as it can represent the energy the car give as a whole instead "ideal" conditions at a given rpm?
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>>15977150
These guys are literally autistic and have become fixated on this. Mods are faggots and don't ban them ever of course.
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>>15977353
>366 ft-lbs
lol no
https://en.wikipedia.org/wiki/Honeywell_AGT1500
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>>15975757
Yeah, did you miss the part in class where they explained the gears perform torque multiplication?
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>>15977295
>leaves
More like gives up (just like the corvette's engine) kek btfo
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>>15975757
>torque is what matters
Both true and false. Hp is what generates torque. It is important to be able to get higher wheelspeed which means less torque as your engine rpms get higher.
If peak hp is 400 at 8500 RPM at a 1:1 gear ratio, your wheels are (theoretically, your wheels alter gear ratio as well, but don't worry about that) moving 8500 times per minute, with a torque of about 247'lbs.
If peak hp is 600 at 1500 RPM at a 1:1 gear ratio your wheels are moving 1500 times per minute, with a torque of about 2100'lbs.
The former is moving faster. The latter can move more weight. Which would you rather be in when Momma McSoccer tries to overtake you in her 2006 Chrysler Town & Country (215hp @ 5200rpm = 217'lbs torque)
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>>15977682
in a nutshell, yes.

This is I think a perfect example. N20 has less peak HP but "feels" stronger practically everywhere on the rev band. At 1500 rpm it has 2x the horse power. At 2000 it has perhaps 30% more horsepower than the N52. So this is what you get with a turbo flatter and higher torque curve.
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>>15977682
yeah, my 135i produced a lot of low end torque but that also translated into lots of low end power. That's usually what people are referring to when they talk about a torquey car. It's more they're talking about its ability to make some power at lower rpms.

Often times it rednecks talking about their 305s "but muh torques". Sorry, your shit box is still slow. It just happens to have a little bit of get up at 2k rpms but nothing to write home about.
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>>15975757
It goes both ways you want close to even torque and hp.
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>>15977704
2750 ft-lbs is at the output of an integrated 7.5:1 reducer gear. Tank transmissions won't shift at 21,000 RPM.
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It's a balance thing, depends really if you want a top speed or high acceleration car. Obviously it's that all that simple but it's all about the balance.
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>>15975775
As president and ruler of the universe your a massive faggot
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>>15977318
>pivoting
>not rotating
Kys famalam
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>>15977798
>Hp is what generates torque.
No point in reading anything past this statement
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>>15978405
Torque is a measurement of force, not work. Motion does not have to exist (work does not have to be accomplished) for a force to exist This is bottom of the barrel basic physics.
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>>15976924
Neither of you are engineers.
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>>15978829
I understand that something can have a force on it without moving but that would mean another force is acting equal and opposite on it. Also doing work is adding energy to a system, which spinning something is not.
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>>15975802
No. Gear up for speed, force (torque) goes down. RPMs or torque can always be tweaked at the expense of the other. Horsepower is the complete picture.
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>>15975775
As an economist, I agree with him. But, he could also be wrong.
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>15.6 ft. lbs
>45 hp
Who needs torque?
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>>15981564
Still a better graph shape than a Toyobaru
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At an elementary level, power is torque applied over time, rpm is the said timekeeper
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>>15981564
you can't read a graph
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>>15981998
I was going off online specs. Not my graph, just the first I found on google
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>>15976679

Lmao that's my post.

I should stop with the analogies.
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>>15975775
as a quantum physics professor, i can agree
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>>15981564
nice cbr faggot
Thread posts: 93
Thread images: 25


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