HP and torque......explanation.
Thread Starter
Safety Car
Joined: Mar 2000
Posts: 4,077
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From: Northeast South Dakota
HP and torque......explanation.
Somebody posted a link to a website once that went into detail in layman's terms how and why HP and torque always meet at 5280????? (I think) RPM and what exactly both mean, as well as the history of HP and torque and how it came to be that we measure both. Does anybody have this address for me? I would appreciate it. I wanted to give it to a friend who was asking about such things. Thanks.
-Justin
-Justin
Melting Slicks
Joined: Apr 2000
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Burning Brakes
Joined: Jul 2001
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From: Ajax Ontario
Re: HP and torque......explanation. (SuperFast80)
Question re gross vs net. I know (roughly) how to take rwhp and work up for drivetrain losses to get "net" rating, then difference from "net" to "gross" using the '71 era numbers as a guide. Stupid question but does the same math work for torque?
In other words if an engine should produce 360 lbs of torque, do you work your rear wheel torque back up using the same calculation? I presume you would, but want to check.
Thanks!!
In other words if an engine should produce 360 lbs of torque, do you work your rear wheel torque back up using the same calculation? I presume you would, but want to check.
Thanks!!
Thread Starter
Safety Car
Joined: Mar 2000
Posts: 4,077
Likes: 27
From: Northeast South Dakota
Re: HP and torque......explanation.
That's the site. Thanks 45ACP. We were talking about HP and torque and a friend was wondering many things about what each mean, and how it came that we calculate them and so on, and I thought of this site. I figured it would be the perfect way to answer his questions. It's good reading for the rest of us as well. :cheers: See, there are a lot of good things on the internet. :chevy
Melting Slicks
Joined: Dec 2000
Posts: 3,407
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From: Carmichael CA
Re: HP and torque......explanation. (Dalannex)
That link was very informative. However, I must point out that talking torque vs HP is like apples and oranges. Torque is a measure of the angular acceleration, while HP is a measure of the linear acceleration at a given rpm.
Safety Car
Joined: Feb 1999
Posts: 3,631
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From: Fountain Hills AZ
Re: HP and torque......explanation. (68shark)
Doug, if I understood your question correctly, the answer is yes. At a given rpm, the only variable that determines the hp is the torque at that rpm. If you know the rear wheel torque, you can use the same methods to make a "guestimate" of the gross rating.
As far as torque and hp being different things, they are but keep in mind that you can't have hp without having torque. Though it's possible to generate torque without rpm (and therefore no hp), that torque would not be doing any work. Torque by itself is a measurement of the potential to do work, hp is a measurement of work that is possible.
As far as torque and hp being different things, they are but keep in mind that you can't have hp without having torque. Though it's possible to generate torque without rpm (and therefore no hp), that torque would not be doing any work. Torque by itself is a measurement of the potential to do work, hp is a measurement of work that is possible.
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