Ah, yes. My apologies.

Regarding the turbo timer...I don't really think it's necessary...but:

It's never a bad idea to bring everything back to normal operating temps before shutting off the motor (as Dean has outlined) if you've been driving hard (whether it's by letting it idle or taking it easy the last couple miles of driving).

The fact of the matter is, heat transfer (cooling the turbo, engine, etc.) will occur at a much higher rate when the water pump is driving coolant flow and heat is being drawn away from the radiator to ambient air. It seems to me the FHI literature may have some validity, but that method relies on residual pressure in the system which definately won't cool things down nearly at the same rate. So shutting off the car after it's been driven hard occasionally probably won't be destructive, but I wouldn't do it all the time.

Agree? Disagree?

Dave

 

Ah, yes. My apologies.

Regarding the turbo timer...I don't really think it's necessary...but:

It's never a bad idea to bring everything back to normal operating temps before shutting off the motor (as Dean has outlined) if you've been driving hard (whether it's by letting it idle or taking it easy the last couple miles of driving).

The fact of the matter is, heat transfer (cooling the turbo, engine, etc.) will occur at a much higher rate when the water pump is driving coolant flow and heat is being drawn away from the radiator to ambient air. It seems to me the FHI literature may have some validity, but that method relies on residual pressure in the system which definately won't cool things down nearly at the same rate. So shutting off the car after it's been driven hard occasionally probably won't be destructive, but I wouldn't do it all the time.

Agree? Disagree?

Dave

 

I'm not sure who Dean is, but I did mention this myself (Kean).

I think their method relies just as much on gravity as it does on pressure. As coolant is vaporized inside the turbo housing, new coolant replaces it (creating a flow). This "flow" will continue until the vaporizing action has stopped (the turbo cools down). How fast or how slow this "flow" occurs is anyone's guess. I just don't see what possible gain FHI/SOA would have to dismiss a cool down procedure as a safety precaution if they thought there would be a problem. I'm not an engineer nor am I intimately familiar with Subaru's design. However, I trust that their engineers know what they are doing. I think this statement sums it up:
"Our current 2.0L turbo engine has a far greater cooling capacity and, coupled with technology advances, makes this practice no longer necessary."
You may find interest in the links I posted earlier.
- Kean]

 

To me the Timer is only $100 definatley better to be safe then sorry. It definatley wont hurt to have one but it might hurt not to. Laters Mikal

 

The problem with this logic is that it's baseless.

 

warranty for what? the blow off valve, or the turbo timer? and subaru can't void your warranty unless THEY can PROVE that your 'aftermarket' part was the reason your car became defective or have malfunctions.

 

A blow off valve can't cause anything to go wrong. A turbo timer is to help save your turbo. Blah, you should be fine.

 

It you want to buy a BOV just for the whoosh sound, save your money. You can get that whoosh sound from your stock BOV. Just remove the intake silencer. I just did it today and the spool of the turbo and the BOV are super loud now. Go to www.scoobymods.com and look for the "intake mod". Directions are perfect.

 

.....more random statements without facts/info.

 

oh i see, hrm, i dont know as i have never had any problems that included warranty in the process. however, i also have heard about some dealers who could care less if you brought in your car to have them service it or do warranty work on it even if your car was catless. (this i know because my friend has done it before), while other dealers will go crazy if they see even the slightest modification on your car.

 

If you can't look on the internet on some topics about turbo timers and blow off valves that isn't my fault. It's a fact people buy turbo timers to let the turbo cool down, just search anything on what a turbo timer is used for. The only thing a 100% atmospheric BOV is doin' is 'causin' you to run a little rich and runnin a little rich is perfectly fine, our cars run rich already.

Don't post like I'm some idiot when you haven't done your homework.

 

On the contrary, I have done my homework. If you read this entire thread you would understand that (check out the links). I know what turbo timers are for and the fact that the modern turbo design found on the Subaru models do not require a "cool down procedure". This means they don't need a to be "idled" therefore a turbo timer is unnecessary.

The intention of my post wasn't to make you sound like an idiot. I'm trying to make a point that some folks tend to post "hear say" rather than useful facts/information. I'm trying to provide those facts so people (like the original poster) are not mislead.

btw, regarding BOV's, I know there are designs that work well with the WRX and others that have proven to be troublesome. The choice is not as simple as you make it out to be (if you read the many posts about them on these forums you would understand). Anyone who is thinking about the purchase of a BOV would be well advised to browse the various Subaru forums to get an idea of what works best on our cars.

- Kean