Other Engine Conversions - non V-8 Discussion of non-rotary engines, exc V-8's, in a car originally powered by a Rotary Engine.

torque misconceptions

Thread Tools
 
Search this Thread
 
Old 10-07-06, 02:09 PM
  #26  
Clean.

Thread Starter
iTrader: (1)
 
ericgrau's Avatar
 
Join Date: Mar 2005
Location: Huntington Beach, CA
Posts: 2,521
Received 2 Likes on 2 Posts
Originally Posted by wingsfan
No, the problem is that you started a polemic thread in the OEC section that has zippo to do with engine conversions.
Again, care to give me a better section? One that talks about torque? Or another way it would relate?
Old 10-07-06, 02:11 PM
  #27  
Schadenfreude...Ha Ha

 
wingsfan's Avatar
 
Join Date: Feb 2002
Location: Austin, TX
Posts: 1,202
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by ericgrau
Again, care to give me a better section?
General Auto or the lounge would be more appropriate. Posting here makes it look like you just want to argue with the v8 crowd.
Old 10-07-06, 02:12 PM
  #28  
Clean.

Thread Starter
iTrader: (1)
 
ericgrau's Avatar
 
Join Date: Mar 2005
Location: Huntington Beach, CA
Posts: 2,521
Received 2 Likes on 2 Posts
There's a general auto section?

There we go. Though the info is still useful when comparing engines, no matter what the type. i.e., a higher horsepower engine is always better than a lower horsepower engine (unless you make up something stupid about one of the engines, like it gets 2mpg, weighs 7 tons, etc.).

Last edited by ericgrau; 10-07-06 at 02:16 PM.
Old 10-07-06, 02:16 PM
  #29  
Schadenfreude...Ha Ha

 
wingsfan's Avatar
 
Join Date: Feb 2002
Location: Austin, TX
Posts: 1,202
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by ericgrau
There's a general auto section?
Considering you started this thread in Gen Auto I find it impossible to believe that you're unaware of its existence
https://www.rx7club.com/showthread.p...ghlight=torque


You started this thread with

I know I'm gonna get some flames for this
which suggets that you're not here to do anything but argue.

There we go. Though it is still useful when comparing engines, no matter what the type.
The other threads addressed the engine comparison just fine. You're not here to do anything other than argue.
Old 10-07-06, 02:26 PM
  #30  
Clean.

Thread Starter
iTrader: (1)
 
ericgrau's Avatar
 
Join Date: Mar 2005
Location: Huntington Beach, CA
Posts: 2,521
Received 2 Likes on 2 Posts
Huh, should have just left the post as-is rather than respond to all the arguments.

Now I have to argue about arguing.

Originally Posted by ericgrau
I know I'm gonna get some flames for this, but there seems to be a widespread lack of understanding about torque.

First let me say that I think the LS1 is great. It delivers lots of power. I am not here to bash LS1's or V8's.
How about, "LS1's are better b/c they have more power, not b/c they have more torque" or "if you swap in a 200HP V6 b/c it has more torque, you'll be sorely disappointed" or "When choosing your V8, pick the one with the most horsepower."

Meh, I'm going to go run errands. The initial post is there for those who want to see it, along with commentary from those who disagree.

Last edited by ericgrau; 10-07-06 at 02:30 PM.
Old 10-07-06, 02:29 PM
  #31  
Schadenfreude...Ha Ha

 
wingsfan's Avatar
 
Join Date: Feb 2002
Location: Austin, TX
Posts: 1,202
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by ericgrau
Huh, should have just left the post as-is rather than respond to all the arguments.
No. You shouldn't have made the thread to begin with.

Now I have to argue about arguing.
Or you could just stop and go away.

How about, "LS1's are better b/c they have more power, not b/c they have more torque" or "if you swap in a 200HP V6 b/c it has more torque, you'll be sorely disappointed" or "When choosing your V8, pick the one with the most horsepower."
We don't have to make blatantly obvious statements like that because torque and HP aren't independent of each other.
Old 10-07-06, 02:40 PM
  #32  
You've Been Punk'd

 
razorback's Avatar
 
Join Date: Jun 2002
Location: Branson, Missouri
Posts: 4,727
Likes: 0
Received 0 Likes on 0 Posts
eric, do you know raptor-t?

(wingsfan will get that )
Old 10-07-06, 02:45 PM
  #33  
Schadenfreude...Ha Ha

 
wingsfan's Avatar
 
Join Date: Feb 2002
Location: Austin, TX
Posts: 1,202
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by razorback
eric, do you know raptor-t?

(wingsfan will get that )


I bet you're happy with the outcome of today's game. At least now we don't have to listen to Auburn bitching about the national championship game.
Old 10-07-06, 02:52 PM
  #34  
You've Been Punk'd

 
razorback's Avatar
 
Join Date: Jun 2002
Location: Branson, Missouri
Posts: 4,727
Likes: 0
Received 0 Likes on 0 Posts
oh i am. its a pretty damn good bday present. it makes me feel all warm and fuzzy inside that we crushed their ntl championship dreams.
Old 10-07-06, 02:55 PM
  #35  
Clean.

Thread Starter
iTrader: (1)
 
ericgrau's Avatar
 
Join Date: Mar 2005
Location: Huntington Beach, CA
Posts: 2,521
Received 2 Likes on 2 Posts
http://www.howstuffworks.com/search.htm
Enter "torque".
In case anybody wants an independant source to learn about it for themself, rather than going on what I or someone else said. I checked a couple of the search results and they both seemed relevant enough. So rather than linking to just one page, I'm linking to the search.
Old 10-07-06, 04:14 PM
  #36  
Wankel Kid

 
RaPtOr-T's Avatar
 
Join Date: Jul 2005
Location: Charlotte, NC
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by razorback
eric, do you know raptor-t?

(wingsfan will get that )
Am I late to this party?

Watch out Eric dipshits can be dangerous in packs.
Old 10-07-06, 04:17 PM
  #37  
Super Snuggles

 
jimlab's Avatar
 
Join Date: Feb 2001
Location: Redmond, WA
Posts: 10,091
Received 32 Likes on 17 Posts
Originally Posted by ericgrau
High torque or a high redline can help increase horsepower, but having high torque or a high redline doesn't necessarily mean anything. But having both does.
WTF?!?

If rpm is different you better not be quoting torque, because the same torque will give two different horsepowers.
WTF?!?

I even included the sentance that could be misinterpreted, in case you want to use that. It's the 1st sentance.
WTF is a "sentance"?

Originally Posted by GtoRx7
Ah, yet another person that truely understands.
No, just another person who understands as poorly as you do. BTW, truly isn't spelled with an "e"...
Old 10-07-06, 04:18 PM
  #38  
Super Snuggles

 
jimlab's Avatar
 
Join Date: Feb 2001
Location: Redmond, WA
Posts: 10,091
Received 32 Likes on 17 Posts
Originally Posted by RaPtOr-T
Watch out Eric dipshits can be dangerous in packs.
This thread is now complete... our resident 17 year-old car expert has arrived.
Old 10-07-06, 04:26 PM
  #39  
Collections Hold
iTrader: (5)
 
GtoRx7's Avatar
 
Join Date: Mar 2003
Location: Pataskala, Ohio
Posts: 1,987
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by jimlab
Wouldn't the same apply to horsepower?

The correct answer is that you can't accurately predict the outcome of a race simply by comparing two peak power numbers, two power to weight ratios, or two power to displacement ratios.

The rate of acceleration of a vehicle is determined by its torque curve, gearing, and weight, as well as rolling and aerodynamic resistance and the coefficient of friction at the contact patch.

F = m * a, where F is the net force with all factors considered, as mentioned above.

Obviously not.

https://www.rx7club.com/showthread.p...ghlight=torque

So, how many times were you planning to start the same thread over again?
What you say is true. But you always leave out a important factor when speaking of acceleration, which is time. Time is needed to figure how LONG it will accelerate with that force. Rpms include time. This is why some races are limited by horsepower (aka GT300, GT500 in japan) as if they were limited by torque alone, power could go off the chart. I am not speaking of V8 vs anything, just to make that clear.

Originally Posted by razorback
so what made you upgrade to a 3 rotor?
To get more horsepower, without boost.
Old 10-07-06, 04:27 PM
  #40  
Wankel Kid

 
RaPtOr-T's Avatar
 
Join Date: Jul 2005
Location: Charlotte, NC
Posts: 555
Likes: 0
Received 0 Likes on 0 Posts
Here are some interesting links:

* How Horsepower Works
* How Force, Power, Torque and Energy Work
* How Car Engines Work
* How Rotary Engines Work
Now why would rotary engines come up with searching torque? Think about that one for a while....

Anyways be the bigger man and just stop posting in this thread, you won't change their minds about anything.
Old 10-07-06, 04:38 PM
  #41  
Super Snuggles

 
jimlab's Avatar
 
Join Date: Feb 2001
Location: Redmond, WA
Posts: 10,091
Received 32 Likes on 17 Posts
Originally Posted by GtoRx7
What you say is true.
Glad you noticed.

But you always leave out a important factor when speaking of acceleration, which is time.
No, I didn't.

Rpms include time.
So does a torque curve...

Every ******* time.
Old 10-07-06, 04:41 PM
  #42  
Super Snuggles

 
jimlab's Avatar
 
Join Date: Feb 2001
Location: Redmond, WA
Posts: 10,091
Received 32 Likes on 17 Posts
Originally Posted by RaPtOr-T
Anyways be the bigger man and just stop posting in this thread, you won't change their minds about anything.
Not without a few actual facts, at any rate. Right Mr. I-took-Calculus?
Old 10-07-06, 04:42 PM
  #43  
Schadenfreude...Ha Ha

 
wingsfan's Avatar
 
Join Date: Feb 2002
Location: Austin, TX
Posts: 1,202
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by RaPtOr-T
Watch out Eric dipshits can be dangerous in packs.
Awww. Someone's still sore from their spanking.
Old 10-07-06, 04:44 PM
  #44  
Schadenfreude...Ha Ha

 
wingsfan's Avatar
 
Join Date: Feb 2002
Location: Austin, TX
Posts: 1,202
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by GtoRx7
To get more horsepower, without boost.
And how'd you get that extra HP without boost?
Old 10-07-06, 04:46 PM
  #45  
Schadenfreude...Ha Ha

 
wingsfan's Avatar
 
Join Date: Feb 2002
Location: Austin, TX
Posts: 1,202
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by RaPtOr-T
Anyways be the bigger man and just stop posting in this thread
Bwahahahahaahahahaha.
Old 10-07-06, 05:00 PM
  #46  
Collections Hold
iTrader: (5)
 
GtoRx7's Avatar
 
Join Date: Mar 2003
Location: Pataskala, Ohio
Posts: 1,987
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by wingsfan
And how'd you get that extra HP without boost?
From the extra torque but I had to keep the rpms too. Otherwise if a 20b redlined at 4k, it would have been a downgrade for power. Jim I know exactly what your saying, you CAN figure out everything by looking at how much torque you have, AND the rpms the torque carries to. But that would have to be said as " I have 300ft-lbs at 9000rpms" instead of saying " I have 514 horsepower at 9000rpms" But you cant go around rating engines by torque alone, you HAVE to know how many rpms is running to see its true potential.
Old 10-07-06, 05:18 PM
  #47  
Schadenfreude...Ha Ha

 
wingsfan's Avatar
 
Join Date: Feb 2002
Location: Austin, TX
Posts: 1,202
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by GtoRx7
From the extra torque
Imagine that.

but I had to keep the rpms too.
Only for the bigger peak number. You're making more torque at every RPM than an NA 2 rotor would.

Otherwise if a 20b redlined at 4k, it would have been a downgrade for power.
Not for the first 4000 rpm it wouldn't.

you CAN figure out everything by looking at how much torque you have, AND the rpms the torque carries to.
The point is that the shape of the curve is important too.

But you cant go around rating engines by torque alone
I don't see anyone doing that. Or you'd see people touting the virtue of their Cummins swaps.

Last edited by wingsfan; 10-07-06 at 05:24 PM.
Old 10-07-06, 05:22 PM
  #48  
Full Member

 
chingon's Avatar
 
Join Date: Jun 2005
Location: EL PASO TX
Posts: 58
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by GtoRx7
What you say is true. But you always leave out a important factor when speaking of acceleration, which is time.
??

acceleration= ΔV/Δt=ΔS/(Δt)^2
F=ma > kg*m/s^2 or lbf*ft/s^2
Old 10-07-06, 08:11 PM
  #49  
You've Been Punk'd

 
razorback's Avatar
 
Join Date: Jun 2002
Location: Branson, Missouri
Posts: 4,727
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by GtoRx7
From the extra torque but I had to keep the rpms too.
thats how you determine hp. without torque, there is no horsepower.. correct?
Old 10-07-06, 09:41 PM
  #50  
Collections Hold
iTrader: (5)
 
GtoRx7's Avatar
 
Join Date: Mar 2003
Location: Pataskala, Ohio
Posts: 1,987
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by razorback
thats how you determine hp. without torque, there is no horsepower.. correct?
Thanks for pointing out the obvious.....


Quick Reply: torque misconceptions



All times are GMT -5. The time now is 04:17 AM.