Can a person feel 3-5 hp?
02-09-2007, 10:54 PM
#51
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Originally Posted by staticlag
Like the title says.
Just think of this. when you are driving during the day and its 100 degrees outside. How does your car feel? Now, when you are driving around during the night and lets say that it dropped to 60 degrees outside. Is your car going to feel faster? Have you noticed it having a bit more pep?
Well, from 100 degrees to 60 degrees, your car just gained about 4 horsepower!
Just think of this. when you are driving during the day and its 100 degrees outside. How does your car feel? Now, when you are driving around during the night and lets say that it dropped to 60 degrees outside. Is your car going to feel faster? Have you noticed it having a bit more pep?
Well, from 100 degrees to 60 degrees, your car just gained about 4 horsepower!
A good driver with sensetive feel can notice 4 HP, but barely. I can surely feel the difference between 65° and 90°, but the older I get the wider the spread needs to be. One way to identify those drivers is to watch them shift. To get the most accelleration often takes shifting at slightly different points. Those drivers can probably feel in the range of 1%.
02-10-2007, 07:29 AM
#54
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Define "increased throttle responce." If you mean "revs quicker while in gear," that my friend, is more torque! Viz, if you put a light flywheel in the car, you are putting more torque to the ground 'cause you are not wasting it on spinning up as much mass in your drivetrain. If you mean "revs quicker in neutral, " yes it could be placebo. If you mean you changed the map of the TPS so that the slope of the line mapping throttle position to petal position is steeper, then yes, this could aslo be placebo.
02-10-2007, 02:36 PM
#58
The Professor
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Reguardless of all the shananigans that you guys are thinking of:
Think of it this way. The bodily force sensor that is interpreting the G data from the change in horsepower, is none other than the inner ear. Thats quite a sensitve organ. Just think of how sensitive it needs to be to keep you standing straight up for any given period of time. The slightest movement is detected and corrected for through muscle contractions. Even in a submarine hitting a 30 up angle a person can stand up straight.
Some of you may be basing your responses on general skin nerve adaption and nerve cell density studies.
Needless to say, there wont be a definitive answer unless we had some sort of clinical trial with a population of at least 30.
Think of it this way. The bodily force sensor that is interpreting the G data from the change in horsepower, is none other than the inner ear. Thats quite a sensitve organ. Just think of how sensitive it needs to be to keep you standing straight up for any given period of time. The slightest movement is detected and corrected for through muscle contractions. Even in a submarine hitting a 30 up angle a person can stand up straight.
Some of you may be basing your responses on general skin nerve adaption and nerve cell density studies.
Needless to say, there wont be a definitive answer unless we had some sort of clinical trial with a population of at least 30.
02-10-2007, 07:42 PM
#59
i pwn therefore i am
Originally Posted by Charles R. Hill
Besides, I don't let my horses run wild when I open my throttle. I am a good driver so I keep them under my control.
02-11-2007, 01:52 AM
#60
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Originally Posted by carbonRX8
Define "increased throttle responce." If you mean "revs quicker while in gear," that my friend, is more torque! Viz, if you put a light flywheel in the car, you are putting more torque to the ground 'cause you are not wasting it on spinning up as much mass in your drivetrain. If you mean "revs quicker in neutral, " yes it could be placebo. If you mean you changed the map of the TPS so that the slope of the line mapping throttle position to petal position is steeper, then yes, this could aslo be placebo.
Also when changing the pulleys most people are resetting the ecu, this raises the afr which would lead to better engine responce & a slight increase of power(if i've read other posts right?)
When the fuel ratio is retrimmed over "x" amount of miles the power is then taken away, you're left with a lighter wallet & a car that revs quicker at idle.
Does this some it up ^
02-11-2007, 02:18 AM
#61
Power!!
Good god people torque, HP? What you FEEL is FORCE or more correctly CHANGE in force on your body from the car pushing you. So let me ask this if the overall force across the entire rev. range increases by 10% would you feel that less than the force increasing by 20% in a 500rpm band? Does that mean that you can feel which of the two cars would have the faster 0-60 time?
that also begs the question how can you change how much force is put to the pavement? If torque is just ft lbs then what happens when I put 10" rims on the car? How many lbs of force am I putting to the pavement now? Have I increased the torque of the engine? Where does the force come from?(not mitichlorines) The article in RotaryGod's link has it right. Acceleration is a force. The equation is based on what our inner ear feels...force. What is the minimum force change you can detect? How do you change the force your inner ear experiences?
that also begs the question how can you change how much force is put to the pavement? If torque is just ft lbs then what happens when I put 10" rims on the car? How many lbs of force am I putting to the pavement now? Have I increased the torque of the engine? Where does the force come from?(not mitichlorines) The article in RotaryGod's link has it right. Acceleration is a force. The equation is based on what our inner ear feels...force. What is the minimum force change you can detect? How do you change the force your inner ear experiences?
02-11-2007, 02:50 AM
#62
Originally Posted by shaunv74
Good god people torque, HP? What you FEEL is FORCE or more correctly CHANGE in force on your body from the car pushing you. So let me ask this if the overall force across the entire rev. range increases by 10% would you feel that less than the force increasing by 20% in a 500rpm band? Does that mean that you can feel which of the two cars would have the faster 0-60 time?
that also begs the question how can you change how much force is put to the pavement? If torque is just ft lbs then what happens when I put 10" rims on the car? How many lbs of force am I putting to the pavement now? Have I increased the torque of the engine? Where does the force come from?(not mitichlorines) The article in RotaryGod's link has it right. Acceleration is a force. The equation is based on what our inner ear feels...force. What is the minimum force change you can detect? How do you change the force your inner ear experiences?
that also begs the question how can you change how much force is put to the pavement? If torque is just ft lbs then what happens when I put 10" rims on the car? How many lbs of force am I putting to the pavement now? Have I increased the torque of the engine? Where does the force come from?(not mitichlorines) The article in RotaryGod's link has it right. Acceleration is a force. The equation is based on what our inner ear feels...force. What is the minimum force change you can detect? How do you change the force your inner ear experiences?
02-11-2007, 03:45 PM
#65
Registered
I am with MM on this. On cooler days the air is denser and you get better throttle response along with a happier engine.
There is a whole set of variables that change when it is cooler out, and they are not just felt by new cars with computers and sensors.
Can you feel 5 HP? Nope. Can you feel a more responsive engine when it is cooler out? Damn right!
There is a whole set of variables that change when it is cooler out, and they are not just felt by new cars with computers and sensors.
Can you feel 5 HP? Nope. Can you feel a more responsive engine when it is cooler out? Damn right!
02-11-2007, 08:02 PM
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Looking over some Data Acqusistion files it was clear that top drivers can feel the difference of 3/1000 of a G and control braking and turning consistently to about 10/1000's of a G. Looking at the Data for lessor drivers (top ten of 40) the sensitivity was about 1/10th as good. Maybe thats one of the keys to top shoes.
I can't say where 5HP fits on an RX8 in that, but it gives me the impression that for every one who can feel 5 HP there are 10 who can't.
I can't say where 5HP fits on an RX8 in that, but it gives me the impression that for every one who can feel 5 HP there are 10 who can't.
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