A6 2.7T Turbo
08-22-2000, 05:16 PM
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A6 2.7T Turbo
Salesman told me that the turbo on the A6 2.7T had timers on it, and that I did not have to worry about warming up and down. I do not have the patience for waiting for the turbo, and want to verify this before buying. Any ideas?
08-22-2000, 05:49 PM
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He's full of it
For starters, there's no such thing as a turbo timer for warming up.
No factory cars that I am aware of come with a turbo timer, a device that lets you turn off your car, arm the alarm, and walk away - while the car continues to run. I can think of any number of reasons why this won't ever be factory spec.
That said, what's the big deal? For warmup, stay out of boost for a few minutes. For cooldown, drive sedately as you approach your destination and/or wait a minute before shutting off the car. Use synthetic oil to cut the risk of coking.
No big deal. Probably decent advice for any engine, especially the warmup bit.
//Greg
No factory cars that I am aware of come with a turbo timer, a device that lets you turn off your car, arm the alarm, and walk away - while the car continues to run. I can think of any number of reasons why this won't ever be factory spec.
That said, what's the big deal? For warmup, stay out of boost for a few minutes. For cooldown, drive sedately as you approach your destination and/or wait a minute before shutting off the car. Use synthetic oil to cut the risk of coking.
No big deal. Probably decent advice for any engine, especially the warmup bit.
//Greg
08-22-2000, 07:23 PM
#4
If you refuse to warmup, at least use MobilOne 0w30 synthetic oil!!
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08-22-2000, 08:58 PM
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Salesman might be referring to the coolant pump that runs after the engine has been shut down hot.
The turbos are water cooled and I do not think they would ever reach critical temp for regular fast driving even hours on ends. I use synthetic oil for peace of mind and as Greg said, normal warm up and shut down is all. Don;t worry about it.
By the way, according to infor posted on RS4.org, Audi claim the post shut down collant pump is to circulate the coolant to prevent its breakdown. No mention about oil temp nor turbo.
Hope it helps.
By the way, according to infor posted on RS4.org, Audi claim the post shut down collant pump is to circulate the coolant to prevent its breakdown. No mention about oil temp nor turbo.
Hope it helps.
08-22-2000, 09:16 PM
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Sort of (m)
There isn't a turbo timer in the traditional since, but the turbos are water cooled and there is a pump which circulates the coolant after the engine is shut off. So in effect the salesperson is right, a turbo timer isn't necessary.
To quote an Audi brochure published when the 2.7T engine was introduced in Europe:
"Both exhaust gas turbocharges are water-cooled and integrated in the cooling circuit.
.
.
.
Located in the cooling circuit is a electrical coolant pump. This pump is required as a means of protection against overheating of the coolant under high thermal load, e.g. when the hot engine is turned off."
If you want to see the original, poorly scanned copy I've placed it on my www page (I downloaded it originally from some site in Europe which had a lot of information on the RS4; I don't recall the URL). The above quote comes from page engine06.jpg.
marcos
'00 2.7T<ul><li><a href="http://members.home.com/marcos/audiengine">http://members.home.com/marcos/audiengine</a</li></ul>
To quote an Audi brochure published when the 2.7T engine was introduced in Europe:
"Both exhaust gas turbocharges are water-cooled and integrated in the cooling circuit.
.
.
.
Located in the cooling circuit is a electrical coolant pump. This pump is required as a means of protection against overheating of the coolant under high thermal load, e.g. when the hot engine is turned off."
If you want to see the original, poorly scanned copy I've placed it on my www page (I downloaded it originally from some site in Europe which had a lot of information on the RS4; I don't recall the URL). The above quote comes from page engine06.jpg.
marcos
'00 2.7T<ul><li><a href="http://members.home.com/marcos/audiengine">http://members.home.com/marcos/audiengine</a</li></ul>
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08-23-2000, 09:16 AM
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What is "warm up" & "cool down"? Some thoughts
Turbo warm up and cool down refer to the temps of the turbo and its oil. At shutoff, moving coolant stops, which wouldn't solve the problem of the now depressurized oil not flowing over those spinning impeller/boost's bearings.
At cooldown, you allow the spindle to return to idle as it is lubed in moving oil. Warm up is the reverse of this. Theoretically, you could live without any coolant to the turbos, as early models did. Oil movement during spindle movement is key to long life.
BTW, these turbo units must be replaced in tandem if one goes on the fritz. $$!<p>98 A6 2.8Q-Tip blk/onyx.
Cold, warm, convenience.
At cooldown, you allow the spindle to return to idle as it is lubed in moving oil. Warm up is the reverse of this. Theoretically, you could live without any coolant to the turbos, as early models did. Oil movement during spindle movement is key to long life.
BTW, these turbo units must be replaced in tandem if one goes on the fritz. $$!<p>98 A6 2.8Q-Tip blk/onyx.
Cold, warm, convenience.
08-23-2000, 12:51 PM
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Define 'warm'. Do you go by the gauges?
In watching my Coolant gauge, it stays at the bottom when cold, and then after about 2 minutes will quite quickly start rising until it gets to half. So if I have the time, sometimes will wait until the needle is not buried in "C", otherwise I just drive it 'gingerly'. What a word.<p><a href="http://registry.audiworld.com/audi/registry/details.asp?car=5325">
<img src="http://www.cameo.net/stuff/augerspin.gif">
    2.7T 2.XS    
</a>
<img src="http://www.cameo.net/stuff/augerspin.gif">
    2.7T 2.XS    
</a>
08-23-2000, 01:15 PM
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What fascinating documents!!
Well, it comes as a surprise that the S4 and A6 Biturbos have such different output characteristics. The A6 seems detuned, for lack of a better word :-(
But! It would seem the A6 has far much more to gain from chipping, since it says the difference is mostly in the programming. The variable valve timing information is interesting too as it basically doesn't cut in unless you're at 90% throttle.
All the extra info about the engine subsystems and explanations was a real treat!<p><a href="http://registry.audiworld.com/audi/registry/details.asp?car=5325">
<img src="http://www.cameo.net/stuff/augerspin.gif">
    2.7T 2.XS    
</a>
But! It would seem the A6 has far much more to gain from chipping, since it says the difference is mostly in the programming. The variable valve timing information is interesting too as it basically doesn't cut in unless you're at 90% throttle.
All the extra info about the engine subsystems and explanations was a real treat!<p><a href="http://registry.audiworld.com/audi/registry/details.asp?car=5325">
<img src="http://www.cameo.net/stuff/augerspin.gif">
    2.7T 2.XS    
</a>