Similarly lugging the engine refers to trying to DEAR CAR TALK. Lugging the Engine A clear example of lugging an engine is driving down the highway in 5th 5MT or 6th 6MT and flooring it with the engine around 2000 to 3000 RPM.
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Lets just say its some real bad shit.
Lugging engine. Imagine if you were on your 10-speed bike and you got to a steep hill and tried to climb it in 10th gear. If the rotational surface speed of the bearing is fast enough fast enough engine rpm the crankshaft will hydroplane up on the oil film and never touch the bearing shell when the engine is running. Many people push down the throttle while driving down the road in a higher gear than the car requires which is harms any engine but it is worse for the turbocharged engines.
So put most simply youre straining the engine. It racks on the rod bearingjournals makes the pistons slap the side of the cylinders hard and if is done enough could probably break piston rings. To put it simply lugging the engine means giving it significant throttle when the drivetrain is at a massive mechanical disadvantage.
To start lets talk about what it means to lug your engine. Youre making it struggle. On my Nomad 1600 if I cruise with the speedo on 60mph in 5th gear the bike will do fine and often get its best gas milage.
Low RPM under load can cause the film to break down and you will get metal-to-metal contact at the main bearings. 2000 RPMs in 5th gear while going down the same hill is not likely to be anywhere near the same load and will not be lugging it. So put most simply youre straining the engine.
Lugging is excessive engine load at lower RPMs typically. There are enough seperate arguments going on about what constitutes engine lugging. I drive a stick shift and I can tell when I am lugging the engine But I dont know what that actually means.
20-22mpg is quite decent from a 23l engine in my opinion and the EPA can come lick my balls and write a report on the hazards of doing that. It also creates a hammer effect all the way through the drivetrain. So what exactly is engine lugging.
If you are short shifting the bike before 4000 RPMs you really arent even experiencing the bike true potential performance not to mention you are doing a disservice to the engine. Dont be lazy- downshift if you are cruising at low rpm and decide to accelerate rapidly. What is the engine lugging.
I dont have the science here to prove it but I think of lugging the engine as riding with the RPMs below the engines optimal or most efficient power band. For Engines In General. Shifting early constantly can be hard on the piston rings in the engine especially if you get to the point of lugging.
Similarly lugging the engine refers to trying to accelerate when youre in too high a gear. Similarly lugging the engine refers to trying to accelerate when youre in too high a gear. The reason you dont want to put a lot of load on the engine at low speed is that the engines oil pressure is lower at low speed.
What happens during engine lugging and why you should not. It can also be considered lugging when in gear and if you accelerate and the car is unable to accelerate. In simple terms it means driving with a full-throttle with the engine is running at really low revs.
Engine lugging occurs when the driver smashes the throttle to the floorboard usually while overtaking on the highway or climbing a hill in too high of a gear and causing the engine to experience high load at too low of an RPM. Figure 72 shows a power curve for an engine designed with lugging ability. This is the term used to describe when youre puttering along in a higher gear than you need to be in and the engine is turning low.
Lugging your engine is tough on the main bearings. You will not know it is wearing for a long time and then it will be too late and you will hear knocking noises when the engine idles. This matters because the main bearings on the crankshaft and connecting rod bearings are all hydrodynamic bearings.
Imagine if you were. I consider lugging anything under 1500 RPMS. Lugging an engine is like hammering the engine parts with every explosion in a cylinder.
Lugging ability is a measure of the amount of temporary overload the tractor can withstand. You can damage the bearings by too much RPM or too low RPM under load. The connecting rod rides on a thin layer of oil in your main bearings.
Youre making it struggle. The lugging ability for a tractor or stationary engine can be illustrated with a horsepower curve. It is also why fuel mileage isnt that much of a concern for me.
But I know its not the best way to use the engine. This leads to the dreaded rod knock. Doing this is very bad for the drivetrain.
Youre lugging your engine if you hear grinding gurgling or other unusual noises that reduce when the RPMS have increased. Otherwise it will rub and wear the bearing. Does not mater what gear it is in.
This builds a lot of load on the engine and also utilizes portions of the ECU maps that may or may not be ideally tuned for it. Example 2000 RPMs in 4th gear while climbing a hill and the engine is likely hammaring itself lugging.
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