<VV> Re: VirtualVairs digest, Vol 1 #1329 - 12 msgs

RoboMan91324@aol.com RoboMan91324@aol.com
Mon, 15 Nov 2004 17:36:23 EST


Cash,

Torque can be described as the turning moment created by a force exerted at a 
defined distance from a point and at a right angle to the line defined by the 
point and where the force is exerted.  Yes, a lever arm.  The lever arm(s) in 
our engines are defined as the distance from the center of the crankshaft as 
it passes through the main journal to the center of the connecting rod 
journal.  A one pound force exerted on a one foot long arm would create one 
foot-pound of torque.  Two pounds of force exerted on the end of a six Inch arm also 
creates one foot pound of torque.  A larger bore engine will potentially create 
more torque because it creates more force on the connecting rod journal not 
because of a change in the length of the lever arm.  "Stroking" the engine will 
create a minimal increase in the arm length but the main increase in torque 
still comes from the increase in the force.  With nothing else changed, a longer 
connecting rod will increase the compression ratio but will not change the 
displacement like a big bore kit will or stroking the engine.  The same effect 
of using a longer connecting rod is achieved if you use thinner head gaskets or 
machine the seat area of the combustion chamber.

I hope that this helps.

Doc
~~~~~
In a message dated 11/13/2004 10:44:01 AM Pacific Standard Time, 
virtualvairs-request@corvair.org writes:


> Message: 5
> To: fastvair@yahoogroups.com, VirtualVairs <virtualvairs@corvair.org>
> Cc: Cash Case <cash.case@sbcglobal.net>
> From: cash case <cash.case@sbcglobal.net>
> Date: Sat, 13 Nov 2004 09:42:02 -0600
> Subject: <VV> Explanation of torque...
> 
> Hello guys- Question:
> What's the explanation of torque?
> 
> My understanding is that torque is a function of leverage. I guess that's 
> it's most basic explanation.
> For those guys wanting to use big bore kits for their 'vair engines the 
> longer connecting rods function a bit like a fulcrum with a long action bar on 
> one side of the fulcrum and a short reaction bar on the other side (Picture a 
> teeter-totter with a short side). I know a longer throw on the crankshaft is 
> the same thing.
> 
> On our corvair motors there's not much we can do about the crank throw. 
> However, If we;re using deeper jugs and longer connecting rods, Does that 
> function the same way?
> 
> Is my understanding correct? Or am I just a wingnut?  ;op
> -Cash
> <snip>