Luggin' - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 06-06-2007, 05:23 AM   #1
Registered Member
 
Join Date: Apr 2007
Posts: 37
Country: United States
Luggin'

We all know that lugging is bad for your vehicle. What I don't know is how exactly it damages a vehicle and why. Can someone explain it to me? Thanks.
__________________

__________________
jdham137 is offline   Reply With Quote
Old 06-06-2007, 09:54 AM   #2
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
I think it is because the engine is not getting enough lubrication, though I'm not sure...it's one of the things I've never paid attention to,
__________________

SVOboy is offline   Reply With Quote
Old 06-07-2007, 10:14 AM   #3
Registered Member
 
Join Date: Apr 2007
Posts: 37
Country: United States
Yeah, that's the only thing I can think of. Can anyone else confirm or add to this?
__________________
jdham137 is offline   Reply With Quote
Old 06-07-2007, 10:24 AM   #4
Registered Member
 
Join Date: Mar 2006
Posts: 675
Country: United States
I don't think it has anything to do with lubrication, although lubrication may be more suspect at the lower rpm's where lugging occur's.

Lugging occurs because the rpm of the motor and the amount of energy each piston is able to contribute in a cycle varies, as the motor is turning. Consequently at lower speeds, with more load, the piston and crank push down harder right after the fuel is ignited, then as the piston loses energy, the load is pushing back and it gets into a mechanical loading, oscillation cycle, which places all sorts of loads on the engine parts.

Since this is happening in a car with 4 cylinders, or more, it is really happening in 4 places in the engine, which goes into a hinky jinky oscilation, including the transmission, halfshafts, wheels and so forth. This oscillation puts stress and load on all of the drivetrain, which are jerky and in excess of normal.

It is sort of a self induced equivalent of revving the engine really high, then popping the clutch out, only it occurs multiple times per second, when the whole drivetrain gets into it's dance. The only way to stop it is to either back off on the throttle, or disengage.

On my Honda as long as I only use a light throttle I can run it at a lower rpm, but if I open the throttle up, it overloads the system and it does the hokey-pokey. Hokey-pokey is hard on all of the drivetrain and if you don't like replacing engine and drive train parts, it isn't a good idea
Gary Palmer is offline   Reply With Quote
Old 06-07-2007, 11:03 AM   #5
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
Here's some more info.
zpiloto is offline   Reply With Quote
Old 06-07-2007, 11:50 AM   #6
Moderator
 
GasSavers_DaX's Avatar
 
Join Date: Oct 2005
Posts: 1,209
Country: United States
Lugging = too much torque at low RPMs.

It's why it is not recommended to spray nitrous below, say 3500 RPM.
GasSavers_DaX is offline   Reply With Quote
Old 06-07-2007, 05:14 PM   #7
Registered Member
 
Join Date: Oct 2006
Posts: 557
Country: United States
Some engines are better able to cope with the effect. Heavier flywheels, thicker castings, special oils, just general 'beef' mitigates the pounding into a banging that can be tolerated for hundreds of thousands of miles.
Not that I operate that way exclusively, but probably more frequently than most might consider prudent.
Lug_Nut is offline   Reply With Quote
Old 06-07-2007, 07:47 PM   #8
Registered Member
 
Join Date: May 2007
Posts: 447
Country: United States
the gas and o2 burn at a certain speed, if the piston is allowed to move too slowly, the pressure in the cylinder is greater. I have a Honda, they are notorious for not having any bottom end. So I don't like going below 1500 in 4th, and about 1750 in 5th.
__________________
slurp812 is offline   Reply With Quote
Old 06-07-2007, 07:53 PM   #9
Registered Member
 
Join Date: Jun 2007
Posts: 358
Country: United States
Send a message via MSN to baddog671
Quote:
Originally Posted by DaX View Post
Lugging = too much torque at low RPMs.

It's why it is not recommended to spray nitrous below, say 3500 RPM.
No worries for me, my engine doesnt have any torque
__________________
baddog671 is offline   Reply With Quote
Old 06-08-2007, 01:01 AM   #10
Registered Member
 
caprice's Avatar
 
Join Date: Feb 2007
Posts: 114
Country: United States
When I drive through my neighborhood with a manual transmission, I use 5th gear. The power the engine at idle is enough to maintain constant speed at ~25 MPH. Scanguage will show around 80 mpg! Note to keep idiots from hurting them selves: obviously you can't use more than ~5% throttle, or it will lug.

Scanguage even shows decreased FE when lugging. Gear selection depends on the throttle position.

Cars aren't lugging at an idle at 700 RPM with the throttle closed.
__________________

__________________
David
85 Chevrolet. 30 MPG or bust!
caprice is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 10:08 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.