Auto Shut-off with a turbo

[racer12306]

This. Even on highway, at 70 mph mine may use 1# boost. A few if going up a hill. Does the OP have a boost gauge?

Not that I've found. I've dug around the settings some, but I'm sure I haven't explored it all yet.

Turbo or not I'd disable the system. If I had a turbo vehicle I would be even more concerned. Flame suit on.

That's in the thoughts. There's a couple simple plug and play options for $100-130.

Just need to figure the better one.

We had it on the past Pacifica and it was more annoying because of the lag in getting it fired. This Wrangler pops much quicker, more fluid of a process.

 

[demarpaint]

Not that I've found. I've dug around the settings some, but I'm sure I haven't explored it all yet.


That's in the thoughts. There's a couple simple plug and play options for $100-130.

Just need to figure the better one.

We had it on the past Pacifica and it was more annoying because of the lag in getting it fired. This Wrangler pops much quicker, more fluid of a process.

I'd disable it on the dealers lot, then install the dongle to make it permanent ASAP once I got the vehicle home.

 

[SHOZ]

Most modern turbo engine use coolant as well as oil for the turbo. The coolant will continue to cool after shutdown due to the convective flow as the heat rises.

 

[thescreensavers]

If that’s your definition of passively cooled, every turbo ever made is passively cooled.

As long as oil temp is below say 220*F at the bearings/bushings, you should never have an issue.

Since the conversation is about cooling the turbo when the car is off not sure what you mean. Also most modern turbos cars run oil higher than 220 when driven hard.

Oil today is significantly better no not coke up the turbos as well, which I think where turbo timers really came from back in the day

I know late model BMWs run their electric water pump and radiator fans to continue circulation after shutdown. Cars like the WRX are touted to have cooling via the coolant after shutdown passively.

 

[D60]

I know late model BMWs run their electric water pump and radiator fans to continue circulation after shutdown. Cars like the WRX are touted to have cooling via the coolant after shutdown passively.

I think Audi was one of the first circa '84 in the Type 44s with I5 turbo. Those after run systems were plagued with problems and rarely worked as they should after a couple years (so, typical Audi).

The concept is solid, though.

 

[KrisZ]

+1 on disabling the start/stop feature. While starters don’t seem to suffer from it, the batteries do and fail more often. Disabling it is a plus on all fronts IMO.

Recently there was a late model Subaru Outback sitting with me at a red light when it was dark, when the light turned green the headlights on the Subaru dimmed noticeably for a split second and I heard the engine re-started. These systems are dreadful.

 

[racer12306]

Lots of interesting information.

Thanks

This has a dedicated turbo coolant system. There's also a dedicated battery for the start/stop system. Don't know much more about it than that and that we had to replace the start/stop battery on our Pacifica a couple years ago.

 

[CapitalTruck]

Older turbos were exclusively oil cooled. They had to be run for a period of time at idle prior to shutting down to allow the oil to cool around the bearings and not coke up when it was turned off. Modern turbos are now water cooled, in addition of course to the oil cooling. Most are designed so that when the engine is shut off the coolant keeps flowing, through natural convection, around turbo. This, in addition to modern synthetic oils, has made all of the older turbo voodoo stuff irrelevant. I would still submit though that you would be doing yourself a favor by being liberal with oil changes. I know on my Chevy 2.7 turbo (pickup) there is an algorithm that will keep the electric water pump running after the engine is shut off. However, my understanding is this is reserved for extreme situations (I have never encountered it and I pull a 6500# trailer frequently.

 

[andrew_j]

My wife does not disable her auto start/stop in 2018 VW Tiguan 2.0T now with 175k trouble free miles since new except an ignition wiring harness…..

 

[JTK]

I learned that turbos should be given a chance to cool off a bit before shutting down. Doesn’t have to be extravagant, such as just pulling into your neighborhood where there’s low load is fine. Don’t shut it off straight from a highway run.

Our 2.0T Wrangler has auto shut-off which seems very short sighted using the logic above. Or am I completely stuck in the past with my logic because these turbos are tiny, water cooled, spec oil that is more geared towards turbo usage compared to in the past?

Does the Wrangler have a auto stop/start disable button? I'd use it on every restart if it has it. IMO, auto stop/start does nothing good for the vehicle mechanically or electronically. I was grateful to be able to immediately disable this feature on the two 2021 GM products in my sig with a $10 bypass harness that takes 2 min to install (or uninstall).

 

[wavinwayne]

My BMW 535d with the 3.0L Turbo Diesel has the auto stop/start, but it's only enabled when ECO power mode is selected. Even then I hit the button to disable it, as I despise it. It can be coded out with an app, I just haven't taken the time.

My wife's X3 also has a turbo and the auto stop/start, which I disable whenever I drive it. She leaves it enabled.

 

[Thermo1223]

My wife does not disable her auto start/stop in 2018 VW Tiguan 2.0T now with 175k trouble free miles since new except an ignition wiring harness…..

This^^^

I've driven and looked under a friends Wrangler before he upgraded from a 2.0t to the V6.

There is an electric coolant pump that runs on the stop/start and after ignition off just like our Tiguan. So there is zero worry as long as your oil changes are within reason. I can't confirm this for any other make but VW also put an electric pump in the transmission to keep pressure up so you can instantly pull away from a stop.

IMO it is a nothing burger. My only gripe with ours is that the logic isn't that smart in the summer months when you need A/C at idle so I disable it.

 

[CKN]

My wife does not disable her auto start/stop in 2018 VW Tiguan 2.0T now with 175k trouble free miles since new except an ignition wiring harness…..

This. There is zero proof start/ stop makes a drive train less reliable. Turbos/ start/ stop is always about worrying about issues that don't exist.

 

[demarpaint]

Does the Wrangler have a auto stop/start disable button? I'd use it on every restart if it has it. IMO, auto stop/start does nothing good for the vehicle mechanically or electronically. I was grateful to be able to immediately disable this feature on the two 2021 GM products in my sig with a $10 bypass harness that takes 2 min to install (or uninstall).

You can disable it in the Wrangler equipped with the system, and ASFAIK there are a few systems available to disable it all the time.

 

[4WD]

Does the Wrangler have an auto stop/start disable button? I'd use it on every restart if it has it. IMO, auto stop/start does nothing good for the vehicle mechanically or electronically. I was grateful to be able to immediately disable this feature on the two 2021 GM products in my sig with a $10 bypass harness that takes 2 min to install (or uninstall).

Mine has a button to disable the S/S garbage … Tazer can disable full time - the hood switch is another option …

 

[CapitalTruck]

This^^^

I've driven and looked under a friends Wrangler before he upgraded from a 2.0t to the V6.

There is an electric coolant pump that runs on the stop/start and after ignition off just like our Tiguan. So there is zero worry as long as your oil changes are within reason. I can't confirm this for any other make but VW also put an electric pump in the transmission to keep pressure up so you can instantly pull away from a stop.

IMO it is a nothing burger. My only gripe with ours is that the logic isn't that smart in the summer months when you need A/C at idle so I disable it.

GM, in the 8 speed, has a small “auxiliary accumulator” that is under high pressure that has a solenoid that when the engine starts the fluid is immediately released, pressurizing the transmission faster than the pump can.

 

[honeeagle]

Aren't most OEM turbos setup these days passively cooled? So when you shut down they still are cooling somewhat.

Siphon cooled

 

[Mainia]

How often do you have engine screaming top rpm and immediately pull into a parking spot?

Even on highway your engine loafs…..

Almost every morning.

 

[honeeagle]

I wonder if you even could shut the engine off if you tried, with it glowing?I bet there is a nanny in the computer to manage that.
anybody run into that?

 

[BMWTurboDzl]

I learned that turbos should be given a chance to cool off a bit before shutting down. Doesn’t have to be extravagant, such as just pulling into your neighborhood where there’s low load is fine. Don’t shut it off straight from a highway run.

Our 2.0T Wrangler has auto shut-off which seems very short sighted using the logic above. Or am I completely stuck in the past with my logic because these turbos are tiny, water cooled, spec oil that is more geared towards turbo usage compared to in the past?

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