How long to cool down?
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Tuned
Joined: Aug 2004
Posts: 449
Likes: 0
From: North Texas
How long to cool down?
I'm curious as to how long I should let the truck cool down after running a long time. I tend to let it run for at least five minutes before turning off, but is it enough?
On the flip side, I'm getting gauges shortly... what temp should I let the pyro run down to before I turn off?
A timer isn't an option right now... gotta pay off the exhaust & gauges first
.
Thanks a bunch.
On the flip side, I'm getting gauges shortly... what temp should I let the pyro run down to before I turn off?
A timer isn't an option right now... gotta pay off the exhaust & gauges first
.Thanks a bunch.
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
Well, I idle my truck for the longest time while hooking up stuff to the hitch and the lowest it has got is about 300 - 350. So, I timed how long it should take it it was about 3 mins, give or take depending on ambient temp. Personally I think that 5 mins is more than enough to reach that temp
Elder User
Joined: May 2006
Posts: 938
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From: Outside Boise, Idaho
If you can believe what you read about the old turbos with plain bearings and the newer turbos with better bearings cool down isn't supposed to be an issue. Which is why when I get to my destination I still screw around with the DVD player, or the CD, or the Navigation System for two minutes and then shut down.
It's insurance.
It's insurance.
Fleet Mechanic
Joined: Mar 2004
Posts: 1,483
Likes: 1
From: SE PA
Just another reason I did not want a diesel...but not tomake this a bashing post...I know for turbo cars you can buy a timer that will alow the vehicle to run a determined time..then shut off. The alarm-remote start I put in my Ex allows for this as well.
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
Originally Posted by Matt M, PA
Just another reason I did not want a diesel...but not tomake this a bashing post...I know for turbo cars you can buy a timer that will alow the vehicle to run a determined time..then shut off. The alarm-remote start I put in my Ex allows for this as well.
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Fleet Mechanic
Joined: Mar 2004
Posts: 1,483
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From: SE PA
aklim...what I meant was that this was another part of the reason I did not want a diesel. I did not want to deal with the warm uo-cool down turbo part. I did not mean that as a bashing comment on diesels. I had a car with a turbo prior to the availability of the timers and it was a pain. (Now Superchargers...we're talkin'!)
And you're right..a turbo timer works on a car or truck or whatever. The only reason I mentioned the timer idea was for those that may not have been familiar with such, and maybe it would save them sitting in the car waiting for the turbo to cool.
And you're right..a turbo timer works on a car or truck or whatever. The only reason I mentioned the timer idea was for those that may not have been familiar with such, and maybe it would save them sitting in the car waiting for the turbo to cool.
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Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
Originally Posted by Matt M, PA
aklim...what I meant was that this was another part of the reason I did not want a diesel. I did not want to deal with the warm uo-cool down turbo part. I did not mean that as a bashing comment on diesels. I had a car with a turbo prior to the availability of the timers and it was a pain. (Now Superchargers...we're talkin'!)
And you're right..a turbo timer works on a car or truck or whatever. The only reason I mentioned the timer idea was for those that may not have been familiar with such, and maybe it would save them sitting in the car waiting for the turbo to cool.
And you're right..a turbo timer works on a car or truck or whatever. The only reason I mentioned the timer idea was for those that may not have been familiar with such, and maybe it would save them sitting in the car waiting for the turbo to cool.
IMO, it is a toss up. Turbos add complexity but utilize exhaust gasses which Superchargers don't and so the parasitic drag. Turbos have longer spool up times which would mandate a "big and little" or sequential turbo system like the new 6.4L should be having thus add more complexity. However, superchargers, IMO would be better in bigger cars which can afford some parasitic drag as opposed to say a 2 litre car.
Fleet Mechanic
Joined: Mar 2004
Posts: 1,483
Likes: 1
From: SE PA
Aklim..I have the V10 is my Excursion as I tow short distances and many use it as a car. Only a few times a year do I travel with my car trailer.
I have a factory Supercharged 2003 Cobra as well. 400 HP out of a 4.6.
I have a factory Supercharged 2003 Cobra as well. 400 HP out of a 4.6.
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
Originally Posted by Matt M, PA
Aklim..I have the V10 is my Excursion as I tow short distances and many use it as a car. Only a few times a year do I travel with my car trailer.
I have a factory Supercharged 2003 Cobra as well. 400 HP out of a 4.6.
I have a factory Supercharged 2003 Cobra as well. 400 HP out of a 4.6.
Fleet Mechanic
Joined: Mar 2004
Posts: 1,483
Likes: 1
From: SE PA
Rated by Ford at 390. I'm sure that's at the crank. I did an intake set-up that supposed to worth 35..according to thedyno sheet that came with it. I'm guessing the 4.6 is about 261 CI. It has 4 valve heads, intercooler.
These cars are raelly under rated. Came with the Viper 6 speed, indepentant rear suspension. With a mix of highway-city, I get 20MPG regularly.
These cars are raelly under rated. Came with the Viper 6 speed, indepentant rear suspension. With a mix of highway-city, I get 20MPG regularly.
Thread Starter
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Tuned
Joined: Aug 2004
Posts: 449
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From: North Texas
Originally Posted by aklim
... the lowest it has got is about 300 - 350. So, I timed how long it should take it it was about 3 mins, give or take...
Many thanks... this is what I was looking for. Thanks a bunch.
Larry
More Turbo
Joined: Jan 2005
Posts: 568
Likes: 38
From: Henniker
It is not the oil cooking the turbo it is the hot exhaust gas. Let the truck cool down briefly. Unless you have it wide open under full load no need to let it idle for 5 min. Watch your exh temp guage, It is only going to get so cool even at idle. Water temp too. I load test diesels full load for 4 hours non stop, They only take 2-3 mins to cool down to where they are not going to get any cooler.
Postmaster
Joined: Jun 2006
Posts: 2,799
Likes: 1
I have an EDGE module on mine which has a temp sensitive turbo timer. It shuts the engine off at 400 degrees. I've yet to hear it idle for more than 2 mins. The two minute idle was after a quarter mile run where I disabled the EGT backdown so she got up to about 1430-1450, well past the 1250 EGT that Ford reccomends. It was only one quarter mile pass though. Had to see what she could do. 
Usually, I don't hear it idle for more than a minute, even after pulling an 8000 lb trailer.
Usually, I don't hear it idle for more than a minute, even after pulling an 8000 lb trailer.