Whats the torque and rpm mean?
- Thread starter BP
- 3 comments
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- 297
lol u must be 12 or so
RPM = Revs Per minute
hmmmm kinda hard to explain, the more the better....means u can stay in one gear longer. For example, ford mustang to get to 80 has to go through 2 gears, the F1 can get to 80 in the 1st gear.....so less switching, faster acceleration.
Now torque is kinda like horsepower, its almost always pretty close to the number of bhp u got. This is kinda hard to explain, im too lazy to type - go find out yourself lol.
RPM = Revs Per minute
hmmmm kinda hard to explain, the more the better....means u can stay in one gear longer. For example, ford mustang to get to 80 has to go through 2 gears, the F1 can get to 80 in the 1st gear.....so less switching, faster acceleration.
Now torque is kinda like horsepower, its almost always pretty close to the number of bhp u got. This is kinda hard to explain, im too lazy to type - go find out yourself lol.
- 452
I really will be brief here...
RPM is the abbreviation for "rotations per minute." It is the speed of your cars crank shaft. Normal everyday car engines spin between 0-7000 RPM. This is gauged by a TACHOMETER. (the gauge on your Display in GT3) At the upper limit of the tachometer, there is a red section that indicates that your crankshaft is spinning too fast, and your engine is in danger of breaking down. This is known as the "redline." Racing cars have much higher redlines because their engines are built to FAR more exacting standards, and have greater stress tolerence. (but are VERY expensive to build) Two years ago, the Mclaren team was running their V-12 engines to 19,000 RPM to try to keep up with the Ferarri Teams. 19,000 is REALLY fast.
The speed of the crank is reduced by the gear ratio in your transmission, which applies TORQUE to the tires.
Torque is force * distance. The way to imagine this is with a wrench. If your wrench is 1 foot long, and you apply 50 Lbs of force on the end of the wrench, the bolt youare turning has 50 Lb/ft of torque applied to it. Get yorself a 3 foot wrench, and you have 150 Lb/ft of torque.
Horsepower is different.
Horsepower (roughly) = [(distance you drive (ft) / time to get there (s) ) * weight (lb)] / 550 (not exact) (to convert units)
In the real world, there are issues such as traction and engine slip to consider, but this is the formula. You'll notice that it is in essence, the formula for acceleration.
A mack truck crank spins 1000 times, and is reduced by a 5:1 gear ratio, the wheel spins 200 times, but it applys all the torque in the crank in those two hundered revolutions. (not real numbers)
An F1 car's crank spins 1000 times, and is reduced by a 2.5:1 ratio, the wheels spin 500 times, but the torque generated by the crank is spread over 500 revolutions, thus you get 40% of the torque at any given moment. (also not real numbers)
So you may be wondering why Torque and Horsepower on car engines is usually very close numberwise. Well, its a coincidence. Change the units and they are nowhere near each other.
Hope that explained it
RPM is the abbreviation for "rotations per minute." It is the speed of your cars crank shaft. Normal everyday car engines spin between 0-7000 RPM. This is gauged by a TACHOMETER. (the gauge on your Display in GT3) At the upper limit of the tachometer, there is a red section that indicates that your crankshaft is spinning too fast, and your engine is in danger of breaking down. This is known as the "redline." Racing cars have much higher redlines because their engines are built to FAR more exacting standards, and have greater stress tolerence. (but are VERY expensive to build) Two years ago, the Mclaren team was running their V-12 engines to 19,000 RPM to try to keep up with the Ferarri Teams. 19,000 is REALLY fast.
The speed of the crank is reduced by the gear ratio in your transmission, which applies TORQUE to the tires.
Torque is force * distance. The way to imagine this is with a wrench. If your wrench is 1 foot long, and you apply 50 Lbs of force on the end of the wrench, the bolt youare turning has 50 Lb/ft of torque applied to it. Get yorself a 3 foot wrench, and you have 150 Lb/ft of torque.
Horsepower is different.
Horsepower (roughly) = [(distance you drive (ft) / time to get there (s) ) * weight (lb)] / 550 (not exact) (to convert units)
In the real world, there are issues such as traction and engine slip to consider, but this is the formula. You'll notice that it is in essence, the formula for acceleration.
A mack truck crank spins 1000 times, and is reduced by a 5:1 gear ratio, the wheel spins 200 times, but it applys all the torque in the crank in those two hundered revolutions. (not real numbers)
An F1 car's crank spins 1000 times, and is reduced by a 2.5:1 ratio, the wheels spin 500 times, but the torque generated by the crank is spread over 500 revolutions, thus you get 40% of the torque at any given moment. (also not real numbers)
So you may be wondering why Torque and Horsepower on car engines is usually very close numberwise. Well, its a coincidence. Change the units and they are nowhere near each other.
Hope that explained it
- 452
bHP is braking horsepower
This is the power of your engine at the crank. It eliminates all your gear ratio issues and loss of power through your drivetrain. You would need special equipment to measure this.
HP is horsepower on a wheel dynomometer. You just need a dyno to get this. (yes I realize that a dyno is special equipment, but they have them anywhere they do emission inspections)
A well built car will lose approximately 15% of its power through its drivetrain, and attempt to maintain maximum power and torque at the wheels. Race cars lose between 7 and 10% through the drivetrain, and generally optimize for horsepower, as their engines run faster.
I believe that all hp figures in GT3 are horsepower at the wheels. Braking horsepower wouldnt do you much good with most race cars. Its really only useful when tuning your drivetrain.
This is the power of your engine at the crank. It eliminates all your gear ratio issues and loss of power through your drivetrain. You would need special equipment to measure this.
HP is horsepower on a wheel dynomometer. You just need a dyno to get this. (yes I realize that a dyno is special equipment, but they have them anywhere they do emission inspections)
A well built car will lose approximately 15% of its power through its drivetrain, and attempt to maintain maximum power and torque at the wheels. Race cars lose between 7 and 10% through the drivetrain, and generally optimize for horsepower, as their engines run faster.
I believe that all hp figures in GT3 are horsepower at the wheels. Braking horsepower wouldnt do you much good with most race cars. Its really only useful when tuning your drivetrain.
