Stalling, what does it do?
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Stalling, what does it do?
so i havent driven my car in awhile, got the axles all rebuilt and put back on and have been driving it this week ( forgot how much nicer it is then my 97 lexus es300 commuter lol!!!))) anyways ive probably have stalled the car 3 times this week doing stupid things, (like trying to back up and not giving it gas, or shifting from 1st to 4th as i roll into the garage) and it got me thinking as i havent stalled a car in quite some time. what actually happens physically to the car? obviously the clutch is no happy. but what about the engine? bearings? crank? cams? drive line? motor mounts? etc etc.... sorry not something ive thought about in over a decade !
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First, i'm surprised it stalled. Most EPC/ DBW cars have anti-stall logic. My S4 (2.7t) was very reluctant to stall.
My S6 is an auto, so that too is reluctant, but i digress.....
When you stall a motor, its similar to stopping it, but faster. Like anything that creates a whip-like effect, many of the parts see "jerk, which is the 1st derivative of acceleration. That common term is actually a technical term, from the railroad industry.
I dont think its a biggie, aside from the momentary abuse of the clutch. And, by definition, a clutch can only war when it slips (although jerk, like in a missed shift on a racetrack (not me!) can literally pull the facing off the rivets - ask me how i know).
All that rotating stuff comes to a stop rather quickly. Fast decel. Then it rocks the bump stops, motor mounts, etc, etc. And the gears sorta bang together. But again, nothing is moving relative to each other so likely no big deal. not that i'd make it a regular event.
Learn to drive! And, actually, ask why its stalling.....
Grant
My S6 is an auto, so that too is reluctant, but i digress.....
When you stall a motor, its similar to stopping it, but faster. Like anything that creates a whip-like effect, many of the parts see "jerk, which is the 1st derivative of acceleration. That common term is actually a technical term, from the railroad industry.
I dont think its a biggie, aside from the momentary abuse of the clutch. And, by definition, a clutch can only war when it slips (although jerk, like in a missed shift on a racetrack (not me!) can literally pull the facing off the rivets - ask me how i know).
All that rotating stuff comes to a stop rather quickly. Fast decel. Then it rocks the bump stops, motor mounts, etc, etc. And the gears sorta bang together. But again, nothing is moving relative to each other so likely no big deal. not that i'd make it a regular event.
Learn to drive! And, actually, ask why its stalling.....
Grant
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haha thanks grant!
i know why its stalling, 12 hour days with 5 hours of sleep are taking their toll!
i only asked as i had a friend with me one time it happened and he slammed me saying that you can cause scoring of the engine because the oil pump stops and the parts are moving slightly, he also said it wears out the gear teeth... then again this is also a guy i got into a two hour argument with in college over who was better: man vs wild or surviorman (the answer should be obvious) so he could have just been being an *** about it
i know why its stalling, 12 hour days with 5 hours of sleep are taking their toll!
i only asked as i had a friend with me one time it happened and he slammed me saying that you can cause scoring of the engine because the oil pump stops and the parts are moving slightly, he also said it wears out the gear teeth... then again this is also a guy i got into a two hour argument with in college over who was better: man vs wild or surviorman (the answer should be obvious) so he could have just been being an *** about it
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update, how bad is it to stall from 30mph !!! lol i had to choose stomp through the floor brake or disengage the clutch! 
car was not happy starting up after that, but it beats getting in a wreck.
car was not happy starting up after that, but it beats getting in a wreck.
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haha i mean like from 30 to zero, i was checking out the new 7 series in front of me and failed to notice them exponentially slowing down... i had my feet hard pressed into the brake and dead pedal and i thought if i lifted off the dead pedal my braking would lift slightly too and i needed all i had....
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