Torque or HP on the road course????? Which is better?
02-04-2009, 10:47 PM
#31
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02-04-2009, 10:48 PM
#32
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02-04-2009, 10:49 PM
#33
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Mark -- I have seen several charts using thrust (lbs of thrust) to determine when to shift gears. These are the ones that show thrust in each gear. These calculations use torque, wheel dia, gear ratio and final drive ratio to calculate thrust. How does that compare to what you're saying above?
02-04-2009, 10:49 PM
#34
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I have a short attention span too, so I know those 4 paragraphs were like reading a book for some. 
Ok, lets just say there are a couple pre-emptive paragraphs to fight off the inevitable questions that usually follow in the beginning of such discussions. in a nut shell:
Hp at any vehicle speed determines rear wheel torque, and thus all accelerative forces. This is regardless of engine torque and engine rpm.
one example:
two cars coming off a turn in the meat of their 2nd gear, if both cars are at 350rwhp going to 400rwhp midway down the straight, one could be going from 4000rpm to 6000rpm and the other from 5300rpm to 8000rpm and both could have the exact same rear wheel torque, meaning both would have the exact same accelerative forces. (meaning: if one had 400ft-lbs peak torque and the other 275ft-lbs, their would be no difference between the performance of the two)
mk
Same weight, same car, the car with more torque at that moment will get out of the corners faster and win the race. It is as simple as that.
02-04-2009, 10:51 PM
#35
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02-04-2009, 10:51 PM
#36
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Two cars with 400 hp, same weight same handling, give me the one with the higher torque any day. Which is exactly what the OP asked, irrespective of Wayne's ignorant drunk posting.
02-04-2009, 10:52 PM
#37
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02-04-2009, 10:55 PM
#38
Formula One Spin Doctor
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You go girl .........................
02-04-2009, 10:57 PM
#39
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02-04-2009, 11:02 PM
#40
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Mark, that's a great explanation.
For the non believers, take your car out, most cars these days have a very flat torque curve. Put the car in 4th gear at 30 mph and floor it, later do the same with the car in 2nd gear, compare acceleration by butt feeling or plug a G-Tech/Pro, Traqmate, Vbox, etc.
Look at the 335i BMW torque curve, quite flat. However the car produces 120 Hp at 2,200 rpm, and with less torque it produces 285 Hp at 5,600 rpm. Which car is quicker, the one with 120 HP or the one with 285 Hp.
Bottom line, the idea is to maximize horsepower to the ground at any given vehicle speed, this is a combination of gearing matching the power curve.
For the non believers, take your car out, most cars these days have a very flat torque curve. Put the car in 4th gear at 30 mph and floor it, later do the same with the car in 2nd gear, compare acceleration by butt feeling or plug a G-Tech/Pro, Traqmate, Vbox, etc.
Look at the 335i BMW torque curve, quite flat. However the car produces 120 Hp at 2,200 rpm, and with less torque it produces 285 Hp at 5,600 rpm. Which car is quicker, the one with 120 HP or the one with 285 Hp.
Bottom line, the idea is to maximize horsepower to the ground at any given vehicle speed, this is a combination of gearing matching the power curve.
02-04-2009, 11:20 PM
#41
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02-04-2009, 11:22 PM
#42
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02-04-2009, 11:26 PM
#43
Formula One Spin Doctor
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..........Cough ........................................You would lose ..............Projecting again numbnut .....
02-04-2009, 11:31 PM
#44
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02-04-2009, 11:35 PM
#45
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This question and debate is so tempting to jump in on, but I think I will keep it simple.
It is an airpump.
Horsepower and Torque are related, with RPM in the equation. - It's a simple equation.
Efficency is king.
Gears, whether trans or rearend/diff can/will multiply effect.
While those statements should clear things up they will probably just muddy it worse for most.
It is an airpump.
Horsepower and Torque are related, with RPM in the equation. - It's a simple equation.
Efficency is king.
Gears, whether trans or rearend/diff can/will multiply effect.
While those statements should clear things up they will probably just muddy it worse for most.