Why torque matters...
05-19-2002, 05:31 PM
#32
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A complex explanation that is not clearly stated is useless
In many of your examples, you do not clearly state what is a constant and what is a variable. For instance, your example about increasing tire diameters. All that you state is that the vehicle weights are the same. Only later do you clarify that the gear ratios are the same. At the same time, you have a round about way of explaining things. In that same example, the engine rpms are completely different which clearly explains the different potential accelerations. This is obvious if you state this upfront but you hide this behind your equations. Otherwise you might make someone think that by decreasing the radii of their tires, they can accelerate faster.
05-19-2002, 05:45 PM
#33
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...to those of limited intellect...
everything I've stated is clearly covered in any first year college physics class. There are many excellent references available on the Internet. Any public library has references explaining the physics and math in detail. If you didn't understand something I stated, you never said so.
If you don't understand the physics, I am not to blame. You're simply incapable because you're too stupid.
If you don't understand the physics, I am not to blame. You're simply incapable because you're too stupid.
05-19-2002, 06:33 PM
#35
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Re: Sir, I believe you mean "bollocks" or bovine scatology. This is a family forum demanding decorum
LOL! Nice mood good. Today I don't have the patience.
As a friend would say, "got yer back, JB."
As a friend would say, "got yer back, JB."
05-19-2002, 07:13 PM
#36
Am curious as to why you waste so much time here with those of us of such
low intellect...have you nothing better to do with that great expanse of gre(a)y matter? World peace...something???
05-19-2002, 07:51 PM
#37
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Just the facts please.
I simply stated that you were not effectively communicating your thoughts. I agree that you have not stated anything incorrectly ... simply that you maded statements that were ambiguous and that required clarification.
05-20-2002, 09:53 AM
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As Bret Maverick's Pappy once said, "Tires is gears, too!"
Changing the radii of tires has the same effect as changing gear ratios. Putting 275/40-18's from a Vette in place of 225/45-17's decreases the revs/mile from 833 to 780 (about 7%), which would have the same effect as dropping the final drive 7% say from 3.316 to 3.105.
Of course the tire radius would increase from 12.5 in. to 13.35 in., so for the same torque applied to the wheel, with a longer moment arm (tire radius), there would be about 7% less force at the tire contact patch to accelerate the car.
eg: (1000 lb-ft/12.5 in x 12in/1 ft) = 960 lbs (force) for the 225/45-17
(1000 lb-ft/13.35 in x 12 in/1 ft) = 899 lbs (force) for the 275/40-18
Conversely, yes, decreasing tire radius should increase acceleration, all else being equal.
(but you knew that).
My $.02
Of course the tire radius would increase from 12.5 in. to 13.35 in., so for the same torque applied to the wheel, with a longer moment arm (tire radius), there would be about 7% less force at the tire contact patch to accelerate the car.
eg: (1000 lb-ft/12.5 in x 12in/1 ft) = 960 lbs (force) for the 225/45-17
(1000 lb-ft/13.35 in x 12 in/1 ft) = 899 lbs (force) for the 275/40-18
Conversely, yes, decreasing tire radius should increase acceleration, all else being equal.
(but you knew that).
My $.02
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