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09-15-2020, 03:53 PM | #21 | |
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Re: Wisdom of Stopping Engine by Choking It Out
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09-15-2020, 04:03 PM | #22 |
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Re: Wisdom of Stopping Engine by Choking It Out
Lots of armchair opinions within, and yet these cars have managed to survive 90 years with all sorts of abuse and neglect.
Choking the engine to kill it will do absolutely no harm to the engine, maybe the plugs overtime. We're talking about such a minimal amount of fuel that is transmitted in a near vapor form. And from maybe 800 rpm to 0 in a matter of seconds. If you were so concerned, you wouldn't choke the engine to start it, and you'd kill the fuel, to stop the engine. Turning off the ignition just takes away the spark, it still allows fuel into the cylinders without burning. |
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09-15-2020, 05:07 PM | #23 | |
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Re: Wisdom of Stopping Engine by Choking It Out
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I never mentioned rust, my concern was dry cylinders. And where is the gas going to evaporate to in a cylinder with the valves closed? i think I will continue to let the carburetor run dry.
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09-15-2020, 08:33 PM | #24 |
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Re: Wisdom of Stopping Engine by Choking It Out
If you choke it, you are cutting off its air supply.
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09-16-2020, 08:46 AM | #25 | |
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Re: Wisdom of Stopping Engine by Choking It Out
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I am not necessarily disputing or disagreeing with you on the 'restart' assistance. I agree you never mentioned rust however I have looked at many cylinders doing inspections and they tend to rust, -even when the valve appear to be seated. This would tend to indicate there is a lack of oil there anyway. The skirts when cold have not expanded enough to create friction like they would when the engine is running. By the time an A engine has started, the rods have splashed enough oil where it is no longer an issue for the lower cylinder walls. As far as where the evaporated fuel goes, my theory is it goes to the same place as where the compression goes when an engine is stopped. It slowly escapes past the ring gaps. |
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09-16-2020, 10:52 AM | #26 |
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Re: Wisdom of Stopping Engine by Choking It Out
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09-17-2020, 09:34 AM | #27 |
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Re: Wisdom of Stopping Engine by Choking It Out - speaking of KICKING TIRES
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Last edited by Benson; 09-17-2020 at 09:46 AM. |
09-17-2020, 10:09 AM | #28 |
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Re: Wisdom of Stopping Engine by Choking It Out
Another point to ponder: In the days of carburetors it was common to find excessive cylinder wall wear at the top, to the extent that a ridge reamer was standard equipment in every mechanic's toolbox. This ridge was often in evidence before 100,000 miles. Now you will see the factory hone crosshatch clear to the top of the cylinders after 300,000 miles-no ridge! I think fuel injection has a lot to do with this. With a carburetor, a choke was needed for cold starts, resulting in a lot of raw gas (liquid fuel does not burn) washing down the cylinders, causing excess wear. With electronic injection, fuel is atomized at approx. 50 psi. The computer richens the mixture, but the air is not choked off so the cylinders are not washed down.
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09-17-2020, 10:58 AM | #29 |
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Re: Wisdom of Stopping Engine by Choking It Out
Methinks that a lot of the longevity of modern engines is in the use of superior metals in the construction.
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09-17-2020, 05:16 PM | #30 |
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Re: Wisdom of Stopping Engine by Choking It Out
Yes very true about superior metals and machining, -and add synthetic oils to the reason for better longevity too, ...not so much on the fuel injection.
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09-17-2020, 11:33 PM | #31 |
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Re: Wisdom of Stopping Engine by Choking It Out
Right or wrong I turn off the gas cock and let it burn up the fuel.
Keeps the fumes down a bit in the garage.
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09-18-2020, 10:13 AM | #32 | |
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Re: Wisdom of Stopping Engine by Choking It Out
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Yup, my father used to do the same thing. He felt it made it easier to restart with a charge of gas in the cylinders. But he stopped doing that when they started putting smog crap on the engines in the early '70s. They were prone to dieseling after switching off the ignition, and goosing it before shutting it off just made it worse. |
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09-18-2020, 10:27 AM | #33 |
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Re: Wisdom of Stopping Engine by Choking It Out
I don't have much of an issue with shutting down by choking, but, I have to ask why.
That doesn't make sense to me. On a cold start the choke is pulled anyway, so why pull it twice. To shut the engine down I give a twist to the key, its easier. |
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