More fun with HP vs torque. the age old comment
02-02-2006, 11:21 PM
#31
Rennlist Member
Thread Starter
There is no real debate here, its just understanding the terms and the physics.
I think what you are talking about is the torque, AT the wheels!!! (not engine torque) HP is equivilant to torque at the wheels at any particular speed. real racing drag racers only rev to 6k???? they are high strung too, and have lots of HP.
stoplight torque to the wheels is how much HP you can put down at any speed.
I think we are talking about the same thing, as the viper graph does prove that its broad HP curve allows it to put down more torque through the gears at any particular speed. however, the max torque of 475ftlbs vs the porsche at 280ftlbs means nothing. if the porsche could put a turbo on it to pump up the hp in the lower 2/3s rpms, the max torque wouldnt change much, and both cars would then have the exact same torque to the driven wheels through their gear boxes. so, yes, it is about torque, but through the gears at any speed. (ie HP)
although as "anyomousagain " said, the closer gears narrows up the useable hp range and makes up a lot of the lower HP car. there is not much you can do about the launch defict in this comparison. the HP curve is just too broad, and thats what it really about. maximizing hp to the wheels at any and all speeds. however ,there are enough gears with the GT3 to reduce the 1st gear via a rear end change and optimize all the gears for drag racing. (especially with the sequential gear box and tight ratios!) however those drag autos are pretty nice when it comes to the all imporant launch.
MK
I think what you are talking about is the torque, AT the wheels!!! (not engine torque) HP is equivilant to torque at the wheels at any particular speed. real racing drag racers only rev to 6k???? they are high strung too, and have lots of HP.
stoplight torque to the wheels is how much HP you can put down at any speed.
I think we are talking about the same thing, as the viper graph does prove that its broad HP curve allows it to put down more torque through the gears at any particular speed. however, the max torque of 475ftlbs vs the porsche at 280ftlbs means nothing. if the porsche could put a turbo on it to pump up the hp in the lower 2/3s rpms, the max torque wouldnt change much, and both cars would then have the exact same torque to the driven wheels through their gear boxes. so, yes, it is about torque, but through the gears at any speed. (ie HP)
although as "anyomousagain " said, the closer gears narrows up the useable hp range and makes up a lot of the lower HP car. there is not much you can do about the launch defict in this comparison. the HP curve is just too broad, and thats what it really about. maximizing hp to the wheels at any and all speeds. however ,there are enough gears with the GT3 to reduce the 1st gear via a rear end change and optimize all the gears for drag racing. (especially with the sequential gear box and tight ratios!) however those drag autos are pretty nice when it comes to the all imporant launch.
MK
Originally Posted by bcdavis
I'm with you Jim...
It's all about the real world.
The whole supercharger/turbo discussion proves how much people can argue and debate the numbers, equations, facts, and figures. But until you actually try to put the rubber to the road, it's all just racing on paper, or racing online. It's not the real world. In the real world, at a stoplight, torque *is* important. How much torque, and where it hits, affects traction and acceleration.
It's all about the real world.
The whole supercharger/turbo discussion proves how much people can argue and debate the numbers, equations, facts, and figures. But until you actually try to put the rubber to the road, it's all just racing on paper, or racing online. It's not the real world. In the real world, at a stoplight, torque *is* important. How much torque, and where it hits, affects traction and acceleration.
02-02-2006, 11:56 PM
#32
Captain Obvious
Super User
Super User
Originally Posted by Jim bailey - 928 International
.............or fully engage the clutch at an rpm which gives you controlled wheel spin with the resultant drop to lower RPM as the engine speed / wheel speed matches that of the car.
This is EXACTLY how I make my runs at the drag strip. It really is an art to get it just right. Gets even harder when the car has high HP and narrow tires.
