Any need to run engine after hard driving like Turbo cars?

[amusante]

So this whole supercharger things is totally new to me and I'm still learning the ropes. I'm coming from a B5 S4 where it's part of the bible that you need to let the car idle for a few minutes after some beast mode to ensure no turbo issues. Is the same mentality required with this car?

My two friends together



Thank you

[S4'ed]

Not like a turbo car....but some idling after high speed extended highway runs is a good idea....lets the exhaust valves cool down a bit.....

[BlownOne]

Ive found that driving easy for the last mile or two after beating on a car works best for any turbo, s/c or n/a setup.

[cjw]

No need. The idling thing is based on hot turbos and comes from the days prior to to having cooled bearings where the oil was the only cooling. Most people just take it a touch easy for the last minute of driving or so now.

[grovlet]

As noted - it's never a bad plan - but no longer truly needed - most turbo cars now are cooled by running coolant lines through the Turbo.

[theweebabyseamus]

As noted - it's never a bad plan - but no longer truly needed - most turbo cars now are cooled by running coolant lines through the Turbo.

+1

Differenty oil supplies from the s/c and engine too, and Im guessing the s/c oil supply doesn't have a cooler anyways.

[SwankP3RF3ct10n]

+1

Differenty oil supplies from the s/c and engine too, and Im guessing the s/c oil supply doesn't have a cooler anyways.

There is no supercharger oil supply. The snout, which houses the gearing, etc. for the supercharger has oil in it, but it's fully enclosed and self-contained. If you plan on doing a highway run, don't be shutting it down right after... if anything, more for the health of the CATs than anything else. The exhaust will get too hot and needs some normal gas flow to bring things back more inline with normal use, that's about all. And it's not really a good idea to heat up an engine like that and then shut it down regardless of if it's NA or FI.

[OnEaNgRyBuNnY]

As noted - it's never a bad plan - but no longer truly needed - most turbo cars now are cooled by running coolant lines through the Turbo.

That's true, but the issue is that, if the turbo is still hot and you shut the engine down, all fluids stop circulating and the oil sits in the extremely hot turbo and bakes. This both breaks down the oil very quickly necessitating a change much sooner, and can bake onto components and cause other issues in extreme or repeated cases. Water cooled turbos get less hot and cool quicker, but if you shut them down after a hard run, the issue is the same, just the time to cool and get out of the danger zone is less.

With these guys, the oil doesn't circulate, it simply sits in the s/c like most trans without cooling loops, so shutting down or not will not affect exposure. Now, that's just the difference between these and turbo cars, not addressing why it may be best to let ANY car chill a bit after being beaten on before shutting her down, as others have also mentioned.


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[Dirt]

That's true, but the issue is that, if the turbo is still hot and you shut the engine down, all fluids stop circulating and the oil sits in the extremely hot turbo and bakes. This both breaks down the oil very quickly necessitating a change much sooner, and can bake onto components and cause other issues in extreme or repeated cases. Water cooled turbos get less hot and cool quicker, but if you shut them down after a hard run, the issue is the same, just the time to cool and get out of the danger zone is less.

With these guys, the oil doesn't circulate, it simply sits in the s/c like most trans without cooling loops, so shutting down or not will not affect exposure. Now, that's just the difference between these and turbo cars, not addressing why it may be best to let ANY car chill a bit after being beaten on before shutting her down, as others have also mentioned.


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Truth.

.

[timzcat]

Just a note on the idle thing. Idle is a not much help but mild driving after hard driving would be helpful regarding all the above comments.
Oil pressure and coolant circulation are low at idle and cooling is also not efficient like it is when the vehicle is moving.It's going to head soak more sitting at idle and not going to help much compared to being off. Modern oil especially synthetics which after often specified in turbo applications will not coke and break down in the turbo, that's one of those old school turbo and oil conditions. I am not advocating shutting down immediately after hard driving but you want to be driving gently to allow temperature stabilization.