<VV> LUG - not nuts

[UltraMonzaWest at aol.com]

In a message dated 3/8/2006 4:20:31 PM Pacific Standard Time, 
hmlinc at sbcglobal.net writes:

> just what is the precise (if there is one) definition?
> 
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I'm shocked!   YOU  don't know this?   Then again..when you're only 
17........LOL!

1
"Lugging"  the engine  is when you use the TORQUE to keep you moving up that 
hill...versus  downshifting....

Example:   todays cars.......you can drive up the steep grade at 70  without 
shifting down / unlocking the Torque Convertor in your automatic...done it 
100's of times...

Today you have your arm around your "partner of choice".....and use the 
Cruise Control......same hill......same speed.....your POC  is not overweight [ we 
hope!]

All of a sudden the  trans shifts down a gear...or 2!!....

Computor says: " it's more efficient to rev the engine higher while under 
this "load"  than "lugging" it..."

2
When driving NON  computor cars.....with manual transmission.....and only a 
Vacuum Advance / weights and springs....to adjust timing......it is possible to 
  leave the engine in a higher gear.......loading it to a point where the 
timing is too far advanced...even when the VA  falls off....and the engine speed 
is too slow...and you foot is too far down on the accelerator! [  quite common 
when going around a street Corner  and forgetting to downshift ]

This also causes pinging / detonation...


3 
"Motor Octane"  gasoline test.........Using Dynometer, they "lug"  the engine 
down to a certain RPM / Throttle opening / Timing advance.......depending on 
what these 3 parameters are......determines the Motor Octane  Rating  [ Also 
done by varying compression ratio]

Source:   various mechanics , Hot Rodders, Engineers...



Matt Nall / Patiomatt / WCUH / Mr. DeckRug
69 Monza Cpe., 66 Monza vert, 65 Crown v8 Cpe.
Somewhere between Reno, NV and Coos Bay, Or.
http://members.aol.com/patiomatt    Corvair Info!