any one fitted turbo timer to 150 prado

[LostDingo2 Find all posts View Profile Close LostDingo2]

I find that people with turbo timers will stand beside the car for the timed period waiting for it to shut down. Probably because they are afraid someone will take it...don't know but instead bothering I have always stood beside it and let it run for a minute or two anyway.

[Big Block Junior Member Find all posts View Profile Close Big Block]

As far as I know there are no tt's available for the 150 and every time I've asked the question I've been asked "why would you want one?" My dealer whom is brilliant said they are not needed at all on modern toyota diesels.


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[LiveFreeAndRoam Avid PP Poster! Find all posts View Profile Close LiveFreeAndRoam]

My dealer whom is brilliant said they are not needed at all on modern toyota diesels.

I am curious about what it is in the modern diesel that makes a TT completely unnecessary.

After I've been working the car hard, I'll often leave it running for a few minutes, specifically to give the Turbo a chance to return to normal operating temperature (manually controlled TT ). What is it about modern diesels that make this unnecessary?

Perhaps I can save a few dollars, noise pollution, and the environment by turning the car off immediately after hard driving??

LFaR.
PS: 2 days before I take delivery of my 150; the transformation begins at ARB today.

[Riv39 Advanced Member Find all posts View Profile Close Riv39]

The manual does say to leave the car running for a while if you stop after a hi-speed run of hill climb etc. I remember reading somewhere back in this thread more detail as to why modern turbo's don't need a TT somethiing to do with the way they are lubricated these days if I recall.

[wooley Avid PP Poster! Find all posts View Profile Close wooley]

I can't tell you why they say they're not required but I can tell you why they don't work on the 150.

The engine, body and transmission computers all talk to each other. To leave the engine running the engine computer obviously needs to be on, to lock the vehicle the body computer needs to be off.

However if the body computer is switched off the engine computer pulls a fault code.

[Derb Senior Member Find all posts View Profile Close Derb]

Hi Fellas. Have been waiting and watching before wading into this interesting discussion. How long have turbo-diesels been on market fitted to all manner of road and leisure vehicles? Why have vehicle manufacturers not fitted turbo-timers ex-factory when they are cheap as chips to fit them on a large scale? Why are the roads not littered with munted turbo-diesel vehicles? One good reason - they are not necessary. The aftermarket producers of these gizmoes must be laughing all the way to the bank. Sure - if you like fitting gizmoes to your vehicle, all power to you but don't use the arguement that the vehicle "needs it". That is pure B.S. and you know it. If you service your vehicle regularly and are not a bloody animal with it, most turbo diesels go to the graveyard with the original turbo's still doing the bizz after hundreds of thousands of kilometres. Cheers, Derb.

[Jeffers Advanced Member Find all posts View Profile Close Jeffers]

I agree Derb. If these diesel motors were required to have timers I'm sure the manufacturers would have installed them from factory.
Here in Australia there is only a small percentage of diesel vehicles being sold compared to petrol. In Europe it's quite the opposite. It's very uncommon to purchase a petrol driven vehicle. With hundreds of thousands of cars large and small being sold with diesel motors, I can guarantee they don't have turbo timers. Can you imagine pulling into your local shopping mall only to find that there are cars everywhere from BMW, Audi, Vauxhall, Citroen etc idling away for 5 to 10 mins... I think not!
Cheers,
Jeff

[naenae Member Find all posts View Profile Close naenae]

To prevent damage to the turbocharger, allow the engine to idle immediately after high speed driving or up hill.
Normal city driving Idle not necessary
High speed
constant speed of approx 80kms - Approx 20 seconds idle time
constant speed of approx 100kms - approx 1 minute idle time
Steep hill driving or continuous driving at 100kms or more - approximately 2 minutes

[ed-gxl Lurker Find all posts View Profile Close ed-gxl]

I understand the use of Turbo timers but the irony is the are more and more diesel cars/SUV these days that come with engine Stop/Start, this means everytime the vehicle stop in traffic or at the garage the engine will be switched off before the driver turn off the ignition. Is this means the end of turbo timer?

[roadblock Junior Member Find all posts View Profile Close roadblock]

Why are the roads not littered with munted turbo-diesel vehicles? One good reason - they are not necessary.

Nicely put Derb. At full (factory) boost, the factory turbo in a prado spins up to around 30-40,000 rpm granted but does not continue spinning for more than 10-15 seconds if you come back to idle from full boost running (hill climbing whilst towing). The two reasons for 'letting it cool down' is firstly to 'bar' the turbo impeller and shaft which essentially keeps the rotor spinning at low RPM to prevent any introduction of stress in the shaft as a result of cooling in a stationary position (engine stopped). It also acts to keep the oils pumping through the veins of the beast to dissipate that heat and continue to provide lubrication for spinning parts. The reason the modern diesels don't need the full 5 minutes of an old Chamberlain 4480 is the engine, manifolds, turbo housings, impellers and shafts are made out of some pretty smart alloys these days which handle heating up and cooling down all day every day and simply aren't prone to the vices of 'old steel'.

Having said all that, I still 'let 'er cool down' for a minute or two regardless before I shut down because that's what I was taught to do growing up pushing 'old steel' around the paddocks. Put it this way... it doesn't hurt to leave it running while you gather your things for the next leg of your journey.

[wooley Avid PP Poster! Find all posts View Profile Close wooley]

The reason the modern diesels don't need the full 5 minutes of an old Chamberlain 4480 is the engine, manifolds, turbo housings, impellers and shafts are made out of some pretty smart alloys these days which handle heating up and cooling down all day every day and simply aren't prone to the vices of 'old steel'.

They had a great motor in them...

[roadblock Junior Member Find all posts View Profile Close roadblock]

Nothing quite like the whine of the 4480. The weapon of choice for thier speed. Ours had a tape player and everything!

[MalcomM Senior Member Find all posts View Profile Close MalcomM]

To quote from another thread -

Turbo timers have never been allowed under ADR's (Australian Design Rules). That's why they have never been factory fit or available as a genuine accessory.

To quote the relevant ADR:

ADR 25-Turbo timers are not to be fitted to vehicles manufactured on or after 1 January 1972 (ADR 25 Anti-
Theft Locks). ADR 25 requires that the normal function of the engine only occurs when the ignition
lock is in the engine on position.

[Ozzietj Lurker Find all posts View Profile Close Ozzietj]

I wonder if you could get away with a technicality on this issue as Prado 150's dont have an ignition lock.
Might need some updating similar to apply.
We saw ADR's updated to cover the newer LED light bars and fitment rules.
But not for turbo timers on vehicles with keyless ignition systems....

[Poppy Joe Member Find all posts View Profile Close Poppy Joe]

How time flies ! Just thinking about this thread and when water cooled Turbos came on the scene . Prior to that Idle down was mandatory to turbo vehicles.
Then water cooling came into play to lessen the problems from early shut downs by inexperienced operators. The water from the radiator still flows through the turbo by convection eliminating hot spots.
I still let mine idle down regardless after a long run.
Cheers Joe