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Old 01-13-2009, 01:54 PM   #1
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So... you say your a wrench ?

My question is where does the engine produce torque, the bore or the stroke ?
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Old 01-13-2009, 02:21 PM   #2
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Ahhhhh.........Chris....Chris to the service desk please...Chris to the service desk!
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Old 01-13-2009, 02:25 PM   #3
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generally from the length of the stroke.

EDIT:
man... thats a setup for lots of inuendos
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Old 01-13-2009, 04:29 PM   #4
With sufficient thrust, pigs fly just fine.
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There is alot more to it than just the stroke. Compression ratio, ignition timing, all play a role in developing torque.
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Old 01-13-2009, 04:42 PM   #6
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Quote:
Originally Posted by chris4x4 View Post
There is alot more to it than just the stroke. Compression ratio, ignition timing, all play a role in developing torque.
well, yes, all those are factors in developing torque, but the original questions was to bore or stroke.
all things being equal what will produce more torque? bore or stroke?

and i am sure there is some threashold that too much of one or the other will reduce torque.
that would be an interesting graph to see, however.... the various combinations of bore and stroke and then the actual torque output. (all other things on the engine being equal of course).
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Old 01-13-2009, 04:58 PM   #7
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But the bigger the hole, the bigger the pole?
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Old 01-13-2009, 05:16 PM   #8
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Quote:
Originally Posted by chris4x4 View Post
There is alot more to it than just the stroke. Compression ratio, ignition timing, all play a role in developing torque.
Granted, you are going to get torque through the very physics of an internal combustion engine, but is it bore you work or stroke to gain torque ?
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Old 01-13-2009, 05:26 PM   #9
With sufficient thrust, pigs fly just fine.
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Well, the longer the stroke, the longer the duration power is applied to the crank, so the answer would be stroke. All thing being equal.
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Old 01-13-2009, 05:32 PM   #10
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The question seems to basic to ansewer?..... to many things apply?
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Old 01-13-2009, 05:33 PM   #11
With sufficient thrust, pigs fly just fine.
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Quote:
Originally Posted by -TRDMAN- View Post
The question seems to basic to ansewer?..... to many things apply?
Absolutly true!
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Old 01-13-2009, 05:36 PM   #12
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Quote:
Originally Posted by chris4x4 View Post
Absolutly true!
Lol thats wat I thought...
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Old 01-13-2009, 07:55 PM   #13
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Quote:
Originally Posted by -TRDMAN- View Post
The question seems to basic to ansewer?..... to many things apply?
I don't understand the use of "basic" , I don't want to seem a tool but ... basic ? come on ? Oxford dictionary says "twisting or rotary force in mechanism" so no matter what the stroke was wouldn't it be determined by the amount of force generated by how large the bore is applied to the length of the crankshaft throw ?
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Old 01-14-2009, 07:24 AM   #14
With sufficient thrust, pigs fly just fine.
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Quote:
Originally Posted by concrete jedi View Post
I don't understand the use of "basic" , I don't want to seem a tool but ... basic ? come on ? Oxford dictionary says "twisting or rotary force in mechanism" so no matter what the stroke was wouldn't it be determined by the amount of force generated by how large the bore is applied to the length of the crankshaft throw ?
The cranckshaft "throw" is determined by the length of the stroke. Imagine a bicycle. Have a 200# guy standing on the crank. A 100mm crank is going to put less torque on the drive train than the same guy standing on a bike with a 175mm crank.
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Old 01-14-2009, 02:35 PM   #15
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Quote:
Originally Posted by chris4x4 View Post
The cranckshaft "throw" is determined by the length of the stroke. Imagine a bicycle. Have a 200# guy standing on the crank. A 100mm crank is going to put less torque on the drive train than the same guy standing on a bike with a 175mm crank.
I understand that, thank you
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Old 01-14-2009, 02:51 PM   #16
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Im lost
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Old 01-14-2009, 03:00 PM   #17
With sufficient thrust, pigs fly just fine.
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Quote:
Originally Posted by kmok View Post
Im lost
H.P. is a mathamatical calculation of Torque. To wit: Power is torque multiplied by engine speed to produce a measurement of the engine's ability to do work over a given period of time. Horsepower is a measure of force in pounds against a distance in feet for a time period of one minute. By substituting an arbitrary lever length for the crankshaft stroke, you can calculate the distance traveled around the crank axis in one minute multiplied by rpm and known torque to arrive at the formula for horsepower.
Because torque and rpm are divided by 5252, torque and horsepower are always equal at 5252 rpm. If you solve the equation at 5252 rpm, the rpm value cancels out, leaving horsepower equal to torque. If you plot torque and horsepower curves on a graph, the lines will always cross at 5250 rpm (rounded off). If they don't, the curve is undoubtedly bogus.
Torque is the static measurement of how much work an engine does, while power is a measure of how fast the work is being done. Since horsepower is calculated from torque, what we are all seeking is the greatest-possible torque value over the broadest-possible rpm range. Horsepower will follow suit, and it will fall in the engine speed range dictated by the many factors that affect the torque curve.
Are you still lost?
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Old 01-14-2009, 03:54 PM   #18
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Quote:
Originally Posted by chris4x4 View Post
The cranckshaft "throw" is determined by the length of the stroke. Imagine a bicycle. Have a 200# guy standing on the crank. A 100mm crank is going to put less torque on the drive train than the same guy standing on a bike with a 175mm crank.
Very well put!!!!
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Old 01-14-2009, 06:59 PM   #19
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To wit? Did you have your cap and gown on while you typed that?
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Old 01-14-2009, 07:01 PM   #20
With sufficient thrust, pigs fly just fine.
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Hey, I,ve been to college. :-)
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