What does engine torque mean to you?

[satria_neo]

Torque and HP are related.

You can think of HP as the torque of the engine produced at a certain HP. Same torque at higher RPM = higher HP

HP is the work done by the engine. Its power produced and HP is a unit. It also can be measured in Watts or Joules/s.

 

[vr2turbo]

Did he mean 380nm from 1,750rpm to redline? That is an addictive long orgasm!

at 1750rpm to too fast, maybe 4250rpm.....hahahahahaha

 

[tiganasfx]

Horsepower = Torque x rpm / 5252

This is the universal equation that links torque (lb-ft) and horsepower (hp). It doesn't matter whether we are talking about petrol engines, diesel engines or steam engines. If we know the rpm and the torque we can calculate horsepower. If we know horsepower and rpm we can calculate torque by rearranging the equation above.

You can also see that when an engine is turning at 5252 rpm, its torque and horsepower figure is the same. Next time you see a graph of the torque and horsepower of an engine check to see that the lines cross at 5252 rpm. If not then the graph is wrong.

 

[WPQ800]

interesting.......

 

[mines998]

Horsepower = Torque x rpm / 5252

This is the universal equation that links torque (lb-ft) and horsepower (hp). It doesn't matter whether we are talking about petrol engines, diesel engines or steam engines. If we know the rpm and the torque we can calculate horsepower. If we know horsepower and rpm we can calculate torque by rearranging the equation above.

You can also see that when an engine is turning at 5252 rpm, its torque and horsepower figure is the same. Next time you see a graph of the torque and horsepower of an engine check to see that the lines cross at 5252 rpm. If not then the graph is wrong.

Bro sorry I don't really get it can you base on the previous dyno chart to tell us the calculation?

 

[tiganasfx]

Well take the above example:

Assuming car A has 160Nm or torque @ 4000RPM
Assuming car B has 160Nm of torque @ 6500RPM

160Nm = 118lb-ft

Car A = 118*4000/5252 = 89.9hp
Car B = 118*6500/5252 = 146hp

As expected car B has higher hp @ higher rpm with the same torque.

At rpm=5252, the Hp = Torque (lb-ft) and the two graphs should intersect.

 

[mines998]

If base on this dyno chart what figure I should take to make the calculation? Sorry I abit stupid can anyone enlighten me?

 

[vr2turbo]

Don't understand either. Then why diesel engine have better torque, if you say they are the same as petrol??
Some engine have max torque at lower rpm? How to explain?
Diesel also have their max at lower rpm?

 

[kher]

Torque is the "desire to go..." Tat's how torque damages some parts inside ur engine bay sometimes.

 

[D7zul]

I hereby post this to complicate things.. hahahahaha

Torque - Wikipedia, the free encyclopedia

Horsepower - Wikipedia, the free encyclopedia

 

[mines998]

If base on this dyno chart what figure I should take to make the calculation? Sorry I abit stupid can anyone enlighten me?

I not sure my calculation is correct or not which 1 I should refer to?

67.4kg/m = 660.5nm
660.5@4922
660.5 X 4922 / 5252 = 618HP?

52.0kg/m = 509.6nm
509@5458
509.6 X 5458 / 5253 = 529HP?

 

[xtremeleo]

I hereby post this to complicate things.. hahahahaha

Torque - Wikipedia, the free encyclopedia

Horsepower - Wikipedia, the free encyclopedia

its not complicated at all sir, quite basic really

 

[D7zul]

I not sure my calculation is correct or not which 1 I should refer to?

67.4kg/m = 660.5nm
660.5@4922
660.5 X 4922 / 5252 = 618HP?

52.0kg/m = 509.6nm
509@5458
509.6 X 5458 / 5253 = 529HP?

Well take the above example:

Assuming car A has 160Nm or torque @ 4000RPM
Assuming car B has 160Nm of torque @ 6500RPM

160Nm = 118lb-ft

Car A = 118*4000/5252 = 89.9hp
Car B = 118*6500/5252 = 146hp

As expected car B has higher hp @ higher rpm with the same torque.

At rpm=5252, the Hp = Torque (lb-ft) and the two graphs should intersect.

i think HP is calculated with LB-FT..




then again, the calculation i think is only for estimation only.. I THINK..

the real torque should be tested on a dyno

 

[tiganasfx]

Don't understand either. Then why diesel engine have better torque, if you say they are the same as petrol??
Some engine have max torque at lower rpm? How to explain?
Diesel also have their max at lower rpm?

Gearing?

 

[tiganasfx]

I not sure my calculation is correct or not which 1 I should refer to?

67.4kg/m = 660.5nm
660.5@4922
660.5 X 4922 / 5252 = 618HP?

52.0kg/m = 509.6nm
509@5458
509.6 X 5458 / 5253 = 529HP?

Your scale is wrong... One "Horsepower" is defined as 33,000 lb-ft per minute which is an Imperial Unit. Therefore your torque should also be in lb-ft (imperial) not nm (metric).

67.4kg/m = 487.5 lb-ft = 456.8 hp @ 4922 rpm
52.0kg/m = 376.12 lb-ft = 390.87 hp @ 5458 rpm

The graph should have both the power measured in horsepower and the torque in foot pounds with both lines shown on the same axes. For example a typical graph....

 

[DeaconFrost]

The legendary diesel Audi R10:

Never revealed it's official torque figure, or did they?

Next time I see a diesel Merc, I better beware. It spits black smoke... and 400Nm: so that it makes sure the smoke that everybody eats is black.

 

[D7zul]

Don't understand either. Then why diesel engine have better torque, if you say they are the same as petrol??
Some engine have max torque at lower rpm? How to explain?
Diesel also have their max at lower rpm?

i think in the early days when petrol engine was design.. they use d engine in all cars..

then, a wise man said.. "hey.. why don't we built a bus or lorry that can carry a lot of people or stuff.."

then they put petrol engine in a bus and carry lots of people and stuff..

very quickly they notice that the petrol engine is not powerful enough to carry heavy things..

after that Rudolf Diesel design an engine that is powerful enough for that purpose in 1893

the engine we know now as the 'Diesel Engine'..

The end..

 

[tiganasfx]

i think HP is calculated with LB-FT..




then again, the calculation i think is only for estimation only.. I THINK..

the real torque should be tested on a dyno

Haha not really.... because there is in fact no way of directly measuring power and all types of dynamometer measure torque and then power is calculated from the formula - BHP = Torque (ft/lbs) x rpm/5252.

Try this... HowStuffWorks "Measuring Horsepower"

 

[D7zul]

Haha not really.... because there is in fact no way of directly measuring power and all types of dynamometer measure torque and then power is calculated from the formula - BHP = Torque (ft/lbs) x rpm/5252.

Try this... HowStuffWorks "Measuring Horsepower"

haha.. i guess u r right

 

[DeaconFrost]

http://robotics.caltech.edu/~mason/ramblings/dieselTorque.html

Brabus D4 (based on Mercedes E270 CDI): 475 Nm
Ferrari F430: 465 Nm
Mitsubishi Evo IX: 392 Nm