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Old 01-10-2019, 03:47 PM   #11
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Originally Posted by PNW_Steve View Post
Interesting...... Any idea why "it didn't last too long "?

I have it on one of my trucks and think it's a great idea. Is there some down side that I am missing?
I am not sure if it really helps I am not sure if it doesn't help.I think the reason the practice was discontinued because the same reasons idle shutdown was programmed into ECM's. Gene
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Old 01-10-2019, 03:52 PM   #12
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Originally Posted by Gdog 5651 View Post
I am not sure if it really helps I am not sure if it doesn't help.I think the reason the practice was discontinued because the same reasons idle shutdown was programmed into ECM's. Gene
From my perspective, I know that it helps. I forces you to allow the turbo to cool down before shutdown. An important practice if you want longevity from your turbo.

The question is why would they discontinue the practice? What are the downsides?
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Old 01-10-2019, 04:23 PM   #13
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Originally Posted by PNW_Steve View Post
From my perspective, I know that it helps. I forces you to allow the turbo to cool down before shutdown. An important practice if you want longevity from your turbo.

The question is why would they discontinue the practice? What are the downsides?



The down sides are: idle time increases fuel consumption, increases air pollution and retards the sale of new/reman turbos. Gene
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Old 01-10-2019, 05:16 PM   #14
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my DEV bus has a label on the dash "Let bus idle for 3-5 minutes before shutdown"..
my red bus i watch the pyro and when it gets down to 300-350 i shut it down.
My superior doesnt have a turbo I just pop it in N and turn it off

-Christopher
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Old 01-10-2019, 05:34 PM   #15
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Originally Posted by Gdog 5651 View Post
The down sides are: idle time increases fuel consumption, increases air pollution and retards the sale of new/reman turbos. Gene
Making a turbo last longer reduces the carbon footprint of the manufacturing process.

I think that unless, there is a better argument against, I will keep my shutdown timer.

I can pull up at the shop and shut the ignition off and the engine will continue to run until EGT's are below a set point. It is not like I leave it idling for hours. 2-6 minutes depending on conditions. If I did not have the timer I would sit in the truck and let it idle for a few minutes anyway. This simply automates the process.
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Old 01-10-2019, 05:53 PM   #16
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reality is the EPA doesnt look at cradle to grave.. only one aspect.. after all why would districts be drilling holes in engines and cutting frames of perfectly good busses so that they can be cruashed into little pieces all because of tailpipe emissions?? what about the emissions it takes to smash, sort, recycle, and re-use any good parts on that bus in a new plant.. oh and all the glass windows that are sadly just crushed and broken into pieces... much of that glass has many years life left in it.. but its just smashed.. and thats suppose to be enviromentally friendly? what about the tail pipe emissions of the glass factory and the steel factory and aluminum factory and plastics factory.. and on and on..



its obvious the $$$ book of someone is the real care and not the environment..

-Christopher


P.S. cash for clunkers anyone??? it sure did raise the price of used cars for dealers.. and forced poor people to use government provided public transit as they couldnt aford to buy used cars any longer...
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Old 01-11-2019, 02:08 PM   #17
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Yesterday I started the bus and just touched the gas pedal a couple of times intermittently and it never sgut down which leads me to believe that it's a timer. Also, an article I read stated First Student had their buses equipped with these timers. Guess who owned this bus before me?
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