Why are there no "Turbo Timers" on the newer cars?

A turbo timer doesn't keep the turbo spinning, just keeps the engine running so whatever cools the turbo keeps pumping.

It's the same as taking a minute to turn the car off after you stop. Or the responsible method and not drive a turbo car at 10 tenths before you plan to turn off the engine. I can't think of a single production car that has/had a turbo timer.

Another reason to always disable auto start/stop every time you get in the car.

 

I would bet that F has a note in the OM to let the engine idle for a minute, or two, before shutting off if just pushed really hard (as even the non-turbo F models typically have that same note).

 

I would assume that in large engine auxiliary cooling can easily deplete the battery. I've added an additional electric coolant pump on my vintage 400i: it takes ~15 minutes to bring the engine temp down to 80°. If the pump is pumping oil, this could take much (much) longer and will likely draw more amps. So unless you have a battery tender this could be an issue.

 

The 296 does have a cooling system that runs after the car is “off”, at least from my experience it has a loud fan that runs in the engine bay even after you lock it and walk away. Several of my friends asked, is it supposed to do that?

 

Ferrari engine tech in many instances is actually well behind the times, an artifact of only producing 10,000 or so cars a year.

Ferrari spends their money on certain areas and not on everything. Things like supplementary cooling after IGN OFF aren't economical to engineer into a kid life refresh at such low volumes and it's more sensible to wait until you have a clean sheet design (like the 296).

Look at the V12, it's off the same architecture since the enzo and they just make tweaks here and there. Only recently with the 12cillindri did they move from flat tappets to finger followers

 

Keep in mind the Ferrari Turbos have engine coolant going through them as well as engine oil so they run at a much lower temperature. Several of them do have an electric water pump that continues to flow coolant through the turbo after shut down.

 

My 1988 944 Turbo S had an electric water pump specifically to cool the turbo.

 

Always good practice to let your car idle down a bit, especially if you are running a turbo engine real hard. It's to help prevent oil coking due to super high temperatures. These days, 100% synthetic oils can tolerate a bit more heat though. Back in the 80's and 90's it was more of a thing. You come home from pushing a turbocharged engine real hard all night and there's usually a red glow coming from under the hood. You don't wanna just shut the engine right off and let the oil boil inside the turbine housing.

Ray

 

Back then it was more a mater of protecting the turbine: the surest way to kill the turbo was to drive the car lole a maniac and shortly after kill the engine while the turbine was still spining at a handfull of #0.000rpm (yes it' a multiplier of 10k) without a steady supply of oil.

The one minute at idle would allow it to slow down while the oil was still flowing. I doubt a glowing hot cast iron would cool in such a reduced timeframe, so the oil got prety hot in any case.

 

All great advice but a few things I'll also add:

1. The same concept applies to cars with water cooled turbo's, not just oil cooled turbo's.

2. The concept is still applicable to modern engines. Even though it's less of an issue than it was 30-40 years ago, it's still good practice.

3. Don't listen to manufacturer advice that says this isn't necessary. Even if a car has a switch off protocol that allows oil/water pumping to continue after shut off, nothing will cool it like cruising (as opposed to loading engine/keeping turbo in high boost) for the last 5-10 minutes before you arrive at your destination and even waiting 30 seconds at the end. Some might say this is a waste of time but I'd rather waste that than $30k on new snails...