Turbo timers & Engine cooldowns

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GT-spec15
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Postby GT-spec15 » Tue Jan 22, 2008 9:36 am

correct, they provide prolonged laughs :lol:

you gotta have a giggle though. i know they do it to "protect" their engine and think theyre doing the right thing...but the reality is, turn the bloody thing off and be done with it.

plus, leaving a car in neutral with only handbrake on? no thanks
i am what willis was talking about.

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superfly
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Postby superfly » Thu Jan 24, 2008 10:15 am

GT-spec15 wrote:plus, leaving a car in neutral with only handbrake on? no thanks


Done it for the last 10 years. No probs as long as your handbrake works.

If not, then I have insurance.

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Postby GT-spec15 » Thu Jan 24, 2008 1:44 pm

each to their own

the need for them has kinda been disproven, so end of the day its just a 'taste' thing really.
i am what willis was talking about.

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Postby owza » Thu Jan 24, 2008 5:32 pm

My 2 cents,

Just cruise the car for the last couple of kays...stay off boost. Keeps the car nice and cool : ) Besides I live in a residential area(im guessing like most ppl on this forum) and have no reason to be tearing up to redline in a local street.

AND
my very trusted mechanic told me it was not necesary. I trust him.
In a paddock.

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GT-spec15
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Postby GT-spec15 » Thu Jan 24, 2008 5:42 pm

owza you are a wise man :)
i am what willis was talking about.

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[WRXTC]
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Postby [WRXTC] » Fri Jan 25, 2008 12:24 pm

superfly wrote:
GT-spec15 wrote:plus, leaving a car in neutral with only handbrake on? no thanks


Done it for the last 10 years. No probs as long as your handbrake works.

If not, then I have insurance.


LOL but dw mines auto anyways ;) not gonna go anywhere with the handbrake up and in Park. so all good :)
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superfly
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Postby superfly » Sun Jan 27, 2008 5:21 pm

GT-spec15 wrote:each to their own



Yup there's a time and place when they come in handy.

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Re: Turbo timers

Postby Random Dude » Mon May 26, 2008 11:54 pm

About time this was FAQ'd and Stickied!
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Re: Turbo timers & Engine cooldowns

Postby MrEs » Sun Nov 02, 2008 9:48 pm

Water Cooling

Whilst turbochargers began to be applied to passenger cars in the late 1970's in response to the energy crisis, the first generation passenger car turbochargers were derived directly from commercial diesel engines. Engine oil was used to provide both lubrication and cooling and whilst this was an effective compromise between cost, durability and performance, in high engine performance applications durability suffered through fouling of the turbocharger bearings through high turbine and bearing temperatures.

By encasing the turbocharger bearings in intricate water passages, engine coolant is used to significantly reduce turbocharger bearing temperatures in order to eliminate the coking and lacquering issues that fouled old fashioned turbocharger bearings. Non water cooled turbochargers have no place in a high performance gasoline engine application and should be avoided at all costs.

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The graph above shows the turbocharger bearing temperature leading up to engine shutdown and for 20 minutes following shutdown. The temperature is displayed relative to the coking threshold of high quality mineral based oil.

As is clearly evident, the old fashioned non water cooled turbocharger operates above the coking threshold when under high load and experiences a very high temperature increase through heat soak immediately after engine shutdown. The APS water cooled turbocharger on the other hand remains cooler than the coking threshold at all times and the bearing temperature increase through heat soak immediately after shutdown is reduced drastically.
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