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Turbo Idle Time

 
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Old 05 Apr 2010, 11:08 pm
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Question Turbo Idle Time

I have read several listings on the internet saying how important it is to idle a turbocharged engine for a minute or more before shutting it off to keep the oil flowing into the turbo and cooling it off. However, in the owners manual of my GT, it says that no idle time is required unless you are driving fast or hauling heavy loads. So my question is, is it really that important for me to idle my GT a little before shutting it off if i just drive it normally? And if so, about how long should i let it idle before it is safe to shut off?
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Old 06 Apr 2010, 01:01 am
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Default Re: Turbo Idle Time

Under normal driving no. If you are driving hard then as the manual says it is a good idea. The issue is, over time traditional oil will coke up in the turbo cooling lines from the excess heat, starving your turbo of oil and ultimately cause it's demise. Use full synthetic oil to be on the safe side.
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Old 06 Apr 2010, 08:24 am
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Default Re: Turbo Idle Time

Agree w/KLCruiser - particularly about synthetic oil - it's a must for turbos.
I just take it easy the last few miles before I reach my destiniation.
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Old 06 Apr 2010, 10:31 am
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Default Re: Turbo Idle Time

if your worried about temps you can invest turbo timer and wire it in, or in a pyrometer guage and tap your exhaust manifold and monitor your exhaust temps.
or buy a Scanguage and and get 40 in 1 and monitor your exhaust temps along with what every you want to monitor that installs easily in your OBD2 port
Aeroforce Technology Inc | Products - Interceptor

or you could always just drive nice 3-5 mins before you reach your destnation and shut down normaly.
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Old 06 Apr 2010, 01:12 pm
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Default Re: Turbo Idle Time

Really no need to worry unless you are running the hell out of it and turning it right off. Common sense is all it takes. No cool down time for normal running and when running hard or heavy idle it for a few minutes. Not rocket science.
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Old 06 Apr 2010, 08:54 pm
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Default Re: Turbo Idle Time

at about what rpm does the turbo kick in?
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Old 06 Apr 2010, 09:26 pm
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Default Re: Turbo Idle Time

Quote:
Originally Posted by PT_or_not_PT View Post
at about what rpm does the turbo kick in?
Around 3k.
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Old 06 Apr 2010, 11:46 pm
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Default Re: Turbo Idle Time

im just curious, but does that mean that it is basically a standard pt cruiser until around 3000, or does the turbo also help some in the lower rpms(<2000)?
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Old 07 Apr 2010, 10:01 am
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Default Re: Turbo Idle Time

Quote:
Originally Posted by Mean Green View Post
Around 3k.
let me help explain:

the turbo doesn't "start boost" at 3k RPM. at idle the compresor wheel and enducer wheel is spinning, as long as there is exhaust coming from the head. At 3k RPM the turbo reaches peak boost based on pcm/vaccum control settings (adjustable).

of course there is a point of transition where the turbo isn't spooling as fast as needed to produce the desired power due to air travel through intercooler piping, but i'm talking about milliseconds.

a n/a PT WHP at 1500rpm will be less than a TD04 PT WHP at 1500rpm.


hopefully this helps.


Josh
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Old 07 Apr 2010, 02:00 pm
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Default Re: Turbo Idle Time

You can feel the turbo kick in around 3k. You're right there is no on/off switch.
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