First off: I've done a number of searches for this and found no thread that answers my question. If one exists, please let me know.

The guys at my local HKS keeps trying to sell me their turbo timer. Now I think i understand what it does, but then I would rather not have the clutter and would rather spend the money on something else.

So, my question, ladies and gentlemen, is this:

Does the addition of the turbo timer benefit the evo in any way?

I don't intend to use it for anything else (1/4mile timer etc). I remember on my Forester, after turing the ignition off, there's a whirring noise that goes on for a while then stops by itself. It was completely stock and I seem to recall that the noise was related to the turbo. Now, nothing like that exists on my Sti or the Evo.

 

Not sure what your actual question is, but the turbo timer keeps the car running for a pre-determined amount of time after you turn off the ignition and leave the car. It is not necessary on our car, since the turbo is oil AND water cooled. The recommendation is that you just do some low-rpm, non-boost driving for the last few minutes before shutting down, but if you are boosting all the way into your parking spot, then sit there and let it idle for a minute or so before turning it off. You don't need the TT for anything beyond it's intended purpose, and for that purpose, it's not even necessary.

 

Thanks mate,

Just to make it clear, I understand that it keeps the engine running for a bit after you switch it off. My point was that if they can have a similar feature on the Subaru Forester, why don't they retain it for the Sti if it's needed.

You just saved me some cash there. Thanks.

 

I don't know anything about the STi. Is that what you're asking about? You should probably ask that on an STi board, not an Evo board, right?

 

no mate.

Thing is, I was just pointing out that if it is simeple enugh to have it on the Forester, then Subaru could also have in on the Sti if is was necessary.

Taking the idea along a little further, it wouldn't be too hard for Mitsu to do it for the evo. Since the two cars are fairly similar in technology and application, I don't think that Mitsubishi would leave it out if it was also necessary for the evo. In other words:

-Forester has one so it's not impossible (for subaru) to incorporate it in the Sti
-The Sti doesn't have it, so it would appear to be unnecessary
-If the Sti doens't need one, why should the evo(?)

A bit convoluted, but I think that's about as clear as it gets...

 

Uh, as clear as it gets? That's as unclear as it gets you mean. Mitsubishi has never had any built-in turbo timing device on USDM cars, but we've been putting turbo timers on the 4g63t for 15 years now. I've never heard of that Forester thing, but what they do with the Forester has nothing to do with the Evo. Different cars, different engines, different turbos...no conclusions to be drawn.

 

sounds clear to me...

He's just saying if it were really NEEDED on the evo, it would come with one from the factory.

 

i would say that it would be cheap insurance to do this

 

+1

No USDM car has ever had a built-in turbo timer. Don't forget that mitsu has a bottom line to think about. Heck, they even cheaped out on the OEM blow off valves and changed to a cheaper oil filter to save a couple dollars here and there. I would also think that they would be concerned about liability if the car was stolen or malifunctioned while cooling down.

 

+2

you can just sit in your car for a minute after a hard run to let the turbo cool down, or use a 100 dollar turbo timer and not have to worry about it
https://www.evolutionm.net/forums/sh...d.php?t=107109

 

My service advisor said that with the new fully synthetic formulas, it was not neccessary to instal a turbo timer. This was a guy who's been in to dsm's for 15 years. The newer oils are very resistant to baking in the lines and causing obstructions, especially if you use the new 15,000 mile Mobil One and change every 5,000.

 

The Sti doesn't use a turbo timer because it doesn't need one. It stores coolant near the turbo while its running and when you shut the car off it uses this extra coolant to cool the turbo. At least thats what I was told by a friend with an 05' STi. Whether my car needs it or not I just idle it for a minute before getting out. Better safe than sorry.

 

No, you don't need it. Only if you wait a minute or two after a hard run. Most people don't, so getting a simple one that's inexpensive wouldn't hurt anything. Better safe then sorry. Just my .02

 

https://www.evolutionm.net/forums/sh...+timer+install

 

the whirring you heard on your Forester was most likely the radiator fan, not something to do with a turbo. Some cars have a temp. switch in the coolant system that will keep the fan running for a bit after you shut the car down.