Author | Topic |

Location: Kita-Ku, Sapporo, Japan
Registered: January 2003
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Re: TORQUE
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Tue, 24 June 2003 11:12

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rusty wrote on Tue, 24 June 2003 20:29 |
"identical power" ...
"accelerate at the same rate".
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that;s the whole frickin point dude, wake up!!!
do some equations and get back to me 
"F1 has 3 times power because of higher rpm."
"F1 car acclerates 3 times faster."
again, that's the whole point, if you gear a car to take advatage of the rpm at which it makes peak torque, you get gearing advantages.
rusty wrote on Tue, 24 June 2003 20:29 |
now allow me to pose an alternative question. one engine with 500lb/ft of torque and only 100hp, another engine with 500hp but only 100lb/ft of torque. both engines in two completely identical cars, with the only exception being gearing, any gearing being allowed. you tell me which car will be quicker. if you still think its car a, im afraid there is no hope for you.
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LOL ROTFL 
so you want me to take a car with 9.5hp (500lb/ft@100rpm)
and race you with a car with 500hp (100lb/ft@26260rpm
dude lay off the drugs, who the heck do you think would win???
i'm saying that if you had that 500hp 26260rpm monster of a motor (which by the way, would be a 740cc under 100% efficiency)
and raced me with a 100rpm motor with 26260lb/ft (which would be an ideal 196L motor), then we would have an even race....
this is because when all is said and done and you gear the motors down, they have the same torque at the rear axle and the same force at the tyres.
please get this idea. it hurts that you can't grasp it 
rusty wrote on Tue, 24 June 2003 20:29 |
this is good. however the first part (and i quote again; "the TORQUE an engine makes and the ENGINE SPEED (rpm) that it makes it at") equals power. funny that.
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well duh, that's what i've been saying all along.
how do you calculate the acceleration of anything? F=MA
how do you work out what the force at a tyre contact patch is? F=TQ/wheel radius
how do you work out axle torque?
engine torque x gearing.
but how do you work out power?
hp = ((lb/ft)xrpm/5252
or (lb/ft) = (hpx5252)/rpm
how do you work out power at rear axle
hp/gearing
tyre contact force,
F = (engine torque) x gearing/wheel radius
how do you work out power at rear axle
hp/gearing
lets take two motors with same power, one at 5000rpm, one at 10000rpm, the 10000rpm motor is geared at 2:1 compared to 5000rpm one
for 10000rpm
axle hp = hp/2
for 5000rpm
axle hp = hp
since (lb/ft) = (hpx5252)/rpm
for 10000rpm
lb/ft = (hpx2626)/rpm
for 5000rpm
lb/ft = (hpx5252)/rpm
now since
F = (engine torque) x gearing/wheel radius
for 10000rpm
F= (((hpx2626)/rpm) x 2)/wheel radius
F=((hpx5252)/rpm)/wheel radius
for 5000rpm
F= (((hpx5252)/rpm) x 1)/wheel radius
F=((hpx5252)/rpm)/wheel radius
and whoop de doo, they are the same. same force at tyre for same POWER, even tho the 10000rpm engne has half the torque as the 5000rpm one.... they still accelerate at the same rate
now please show me your calculations to disprove that two cars with identical POWER, but different TORQUE, when gearing is made to equal the top speed of both motors, will not have the same acceleration..
i dare you.. no i double dare you to brign those calculations to the forum, or even dyno day (if you will show up)
you can't accept that a motor with twice the torque but half the revs and half the gearing accelerates at the same speed as one with half the torque, double the revs and double the gearing...
fcs, i agree with you that more power = faster acceleration, but this does not happen unless you change gearing. and in the real world there are only a certain number of ratios you can choose. do you change you diff everytime you increase the rpm range of your motor? (i actually did when i cammed my 4K, i put a 4.33 instead of a 4.11, TO TAKE ADVANTAGE OF GEARING!!!)
please check the clacs above and show me how what i have said is incorrect from a mathematical standpoint.
Cya at the dyno day (i assume you are coming?)
Stewart
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| Subject | Poster | Date |
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TORQUE
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TA22-3SGTE | Sat, 21 June 2003 13:20 |
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gianttomato | Sun, 22 June 2003 02:18 |
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rusty | Mon, 23 June 2003 19:37 |
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Re: TORQUE
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BAD22 | Tue, 24 June 2003 01:57 |
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Re: TORQUE
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oldcorollas | Tue, 24 June 2003 07:17 |
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Re: TORQUE
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rusty | Tue, 24 June 2003 08:33 |
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Re: TORQUE
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oldcorollas | Tue, 24 June 2003 09:32 |
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Re: TORQUE
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gianttomato | Tue, 24 June 2003 09:42 |
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Re: TORQUE
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Gremlin | Thu, 26 June 2003 02:16 |
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Re: TORQUE
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rusty | Tue, 24 June 2003 10:29 |
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Re: TORQUE
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oldcorollas | Tue, 24 June 2003 11:12 |
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Re: TORQUE
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gianttomato | Tue, 24 June 2003 11:46 |
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Re: TORQUE
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oldcorollas | Tue, 24 June 2003 12:01 |
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Re: TORQUE
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trent_kershaw | Tue, 24 June 2003 14:03 |
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Re: TORQUE
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NO-18r | Sat, 21 June 2003 08:48 |
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Re: TORQUE
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BAD22 | Sat, 21 June 2003 08:49 |
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Re: TORQUE
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manipulate | Sat, 21 June 2003 08:51 |
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Re: TORQUE
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manipulate | Sat, 21 June 2003 13:10 |
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Re: TORQUE
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BAD22 | Sat, 21 June 2003 13:12 |
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Re: TORQUE
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cam_RA40 | Sat, 21 June 2003 23:17 |
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Re: TORQUE
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JDM hachi | Sat, 21 June 2003 22:52 |
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Re: TORQUE
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manipulate | Sun, 22 June 2003 01:55 |
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Re: TORQUE
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charliechalk | Sun, 22 June 2003 11:26 |
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Re: TORQUE
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BAD22 | Sun, 22 June 2003 15:58 |
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Re: TORQUE
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gianttomato | Mon, 23 June 2003 01:05 |
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Re: TORQUE
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charliechalk | Mon, 23 June 2003 08:06 |
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Re: TORQUE
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BAD22 | Mon, 23 June 2003 10:00 |
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Re: TORQUE
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Super Jamie | Tue, 24 June 2003 11:04 |
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Re: TORQUE
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kingmick | Tue, 24 June 2003 12:18 |
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Re: TORQUE
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THE WITZL | Tue, 24 June 2003 12:27 |
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Re: TORQUE
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trent_kershaw | Tue, 24 June 2003 12:44 |
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Re: TORQUE
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THE WITZL | Tue, 24 June 2003 13:06 |
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Re: TORQUE
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rusty | Tue, 24 June 2003 16:35 |
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Re: TORQUE
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juzzo84 | Tue, 24 June 2003 21:08 |
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Re: TORQUE
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boudan | Tue, 24 June 2003 22:49 |
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Re: TORQUE
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Super Jamie | Wed, 25 June 2003 07:26 |
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Re: TORQUE and shite stirring
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oldcorollas | Wed, 25 June 2003 12:27 |
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Re: TORQUE and shite stirring
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oldcorollas | Wed, 25 June 2003 12:36 |
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Re: TORQUE
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boudan | Thu, 26 June 2003 00:37 |
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Re: TORQUE
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bayka | Wed, 25 June 2003 17:41 |
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Re: TORQUE
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Norbie | Wed, 25 June 2003 22:37 |
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Re: TORQUE
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dar_sbb | Thu, 26 June 2003 01:58 |
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Re: TORQUE
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bayka | Thu, 26 June 2003 05:49 |
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Re: flat TORQUE curves
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oldcorollas | Thu, 26 June 2003 06:23 |
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Re: flat TORQUE curves
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Nark | Thu, 26 June 2003 06:45 |
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Re: flat TORQUE curves
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oldcorollas | Thu, 26 June 2003 07:03 |
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