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08-06-2020, 12:28 PM
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#1 |
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Senior Member
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Physics of Racing Torque Converters
Can anyone share the main governing equations for torque converters?
I think Russ Abrahams (sp) had something, but I can't remember them at this time. |
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08-06-2020, 02:53 PM
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#2 |
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Senior Member
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Re: Physics of Racing Torque Converters
One of the formulas is K=n/square root T
K is number that is the looseness of the converter n is the stall speed T is the engine torque Russ Abrams 3011 GT/FA |
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08-07-2020, 09:53 AM
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#3 |
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Re: Physics of Racing Torque Converters
some years ago Brandon with BTE did an extensive and informative series about a - z on the subject. Maybe that post is somewhere in the archives.
If it can't be found, maye Brandon would repost the series.
__________________
Larry Woodfin 471W |
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08-07-2020, 10:05 AM
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#4 |
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Re: Physics of Racing Torque Converters
Russ, thanks for the reply.
Units are rpm and ft*lbs? But there must be something about torque at an rpm. Say you have an electric motor with a flat torque curve of 500 ft*lbs and you want stall of 6,000 rpm. What additional info is needed? |
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08-07-2020, 11:21 AM
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#5 |
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Re: Physics of Racing Torque Converters
That is the whole point of that formula . You have to develop a K factor that gives you the rpm you want with the torque you have at that rpm . In general you have different stators and different pumps that will give you a combo that matches the K factor desired . units are in rpm and ft.lbs.
Last edited by ss3011; 08-07-2020 at 11:23 AM. Reason: added info |
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08-07-2020, 01:01 PM
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#6 |
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Re: Physics of Racing Torque Converters
If you can find a copy, "design of single stage, three element torque converters" by V. J. Jandasek explains torque converter function very well, including K factor. You might be able to get a copy from the SAE or it is in the third edition of "design practices, passenger car automatic transmissions", published by the SAE.
Jim Mantle V/SA 6632 |
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08-08-2020, 12:28 AM
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#7 |
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Re: Physics of Racing Torque Converters
It might seem insignificant to most, but when you try to do math without using the correct units one will get incorrect answers.Torque is a twisting force and is typically expressed in lbs-ft while work is typically expressed in ft-lbs (energy). Yeah I know that seems to be nit picky but it makes a difference when you practice unit cancellation in the mathematics on the subject material.
 Regards, HB2  Dissident |
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