how to explain torque?
#22
how to explain torque?
Originally posted by: 86LT250RFatty
put it this way. In a 1/4 Mile.... HP is Speed, Tourqe is Time.... to an extent.
put it this way. In a 1/4 Mile.... HP is Speed, Tourqe is Time.... to an extent.
#24
how to explain torque?
Originally posted by: BryceGTX
Hello guys. Lets put some numbers to it. Suppose you have a diesel that puts out 400 foot pound at 1500 rpm. It then puts out:
400*1500/5252 = 114 hp
Now lets look at the diesel when it puts out 400 foot pounds at 3500 rpm
400*3500/5252 = 266 hp
Like Bubba297 says, this is how a dyno controller calculates horse power. It measures the speed, measures the torque and simply multiples the two values and divides by 5252.
BryceGTX
Hello guys. Lets put some numbers to it. Suppose you have a diesel that puts out 400 foot pound at 1500 rpm. It then puts out:
400*1500/5252 = 114 hp
Now lets look at the diesel when it puts out 400 foot pounds at 3500 rpm
400*3500/5252 = 266 hp
Like Bubba297 says, this is how a dyno controller calculates horse power. It measures the speed, measures the torque and simply multiples the two values and divides by 5252.
BryceGTX
at what rpm does it assign that hp? same as torque?
#25
how to explain torque?
at what rpm does it assign that hp? same as torque?
Power (w) = Torque (Nm) * Speed (rads/s)
In this case, when the speed is 1 radian per second (9.5 rpm), Torque and Power are the same!!
#26
how to explain torque?
Originally posted by: 440EX026
Not the first time I have heard that, and I do agree with that thinking. I remember when I was much younger (maybe 8 or 10) wondering and asking why some guys could win races consistantly with lower top speeds, and the explanation was very similar to what you posted, and oddly I still remember it [img]i/expressions/face-icon-small-smile.gif[/img]
Originally posted by: 86LT250RFatty
put it this way. In a 1/4 Mile.... HP is Speed, Tourqe is Time.... to an extent.
put it this way. In a 1/4 Mile.... HP is Speed, Tourqe is Time.... to an extent.
My old 70 chevelle drag car ran a 377 small block chevy. We ran a 1000ft track, right between 1/8 and 1/4. With the original combo the car had 1.44-1.45 60ft times and ran 8.6's and 8.7's at around 113-114mph and that was shifting at around 6800rpms. Now when I tore the motor down I changed cams and went to a higher duration and lift. The car still ran consistent 8.6's, but things were reverse at the start and end. The 60ft times came up to around a 1.47-1.48, but the trap speed increased to 116-117mph and shifting occured at around 7000-7200rpms. The first motor combo made more torque in the middle and would holeshot hard, but the second combo made more HP on top end which resulted in a higher trap speed. Overall more torque especially lower on the rpm range makes for a lot more fun driving or riding.
#27
how to explain torque?
Originally posted by: Bubba297
That's right. for example.......
My old 70 chevelle drag car ran a 377 small block chevy. We ran a 1000ft track, right between 1/8 and 1/4. With the original combo the car had 1.44-1.45 60ft times and ran 8.6's and 8.7's at around 113-114mph and that was shifting at around 6800rpms. Now when I tore the motor down I changed cams and went to a higher duration and lift. The car still ran consistent 8.6's, but things were reverse at the start and end. The 60ft times came up to around a 1.47-1.48, but the trap speed increased to 116-117mph and shifting occured at around 7000-7200rpms. The first motor combo made more torque in the middle and would holeshot hard, but the second combo made more HP on top end which resulted in a higher trap speed. Overall more torque especially lower on the rpm range makes for a lot more fun driving or riding.
Originally posted by: 440EX026
Not the first time I have heard that, and I do agree with that thinking. I remember when I was much younger (maybe 8 or 10) wondering and asking why some guys could win races consistantly with lower top speeds, and the explanation was very similar to what you posted, and oddly I still remember it [img]i/expressions/face-icon-small-smile.gif[/img]
Originally posted by: 86LT250RFatty
put it this way. In a 1/4 Mile.... HP is Speed, Tourqe is Time.... to an extent.
put it this way. In a 1/4 Mile.... HP is Speed, Tourqe is Time.... to an extent.
My old 70 chevelle drag car ran a 377 small block chevy. We ran a 1000ft track, right between 1/8 and 1/4. With the original combo the car had 1.44-1.45 60ft times and ran 8.6's and 8.7's at around 113-114mph and that was shifting at around 6800rpms. Now when I tore the motor down I changed cams and went to a higher duration and lift. The car still ran consistent 8.6's, but things were reverse at the start and end. The 60ft times came up to around a 1.47-1.48, but the trap speed increased to 116-117mph and shifting occured at around 7000-7200rpms. The first motor combo made more torque in the middle and would holeshot hard, but the second combo made more HP on top end which resulted in a higher trap speed. Overall more torque especially lower on the rpm range makes for a lot more fun driving or riding.
#28
how to explain torque?
This is a really good way to think of it: (from HughJazz)
"Torque is how much work you can do -
Horsepower is how fast you can get it done "
Torque is force, like foot-pounds.... think strength.
HP is that force over time, how "fast" you can deliver that force to the wheels or ground, where ever you chose to measure it.
Each different racing application will need the particular optimum combination of these two, it's not always the same answer. Torque might be more important to trail riders, and HP might be more important to drag racers.
#29
#30
how to explain torque?
of course as we all know torque equals the force required to get an object moving, horsepower equals the amount of force required to move an obect over a cetain distance, simple?
BryceGTX