Slow cooling
Thread Starter
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Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
Would stuck vanes show up on the VGT monitor on a ScanGauge?
Certified Thread Hijacker
Joined: Aug 2001
Posts: 14,441
Likes: 60
Not necessarily.
Since VGT% is a command and not what the actual vanes are doing it's a tough call.
Shouldn't normally see either 85% or 15% at any given time. Although some have perfectly fine running engines and will see 85% occasionally at idle.
What is your max boost and do you experience any abnormal turbo lag? Black smoke?
Josh
Since VGT% is a command and not what the actual vanes are doing it's a tough call.
Shouldn't normally see either 85% or 15% at any given time. Although some have perfectly fine running engines and will see 85% occasionally at idle.
What is your max boost and do you experience any abnormal turbo lag? Black smoke?
Josh
Lead Driver
Joined: Sep 2012
Posts: 7,833
Likes: 96
From: Manteca,Ca
sorry guys must of been asleep at the wheel
, found this to be an Interesting read
https://www.ford-trucks.com/forums/4...l#post14852133
, found this to be an Interesting readhttps://www.ford-trucks.com/forums/4...l#post14852133
Thread Starter
|
Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
Not necessarily.
Since VGT% is a command and not what the actual vanes are doing it's a tough call.
Shouldn't normally see either 85% or 15% at any given time. Although some have perfectly fine running engines and will see 85% occasionally at idle.
What is your max boost and do you experience any abnormal turbo lag? Black smoke?
Josh
Since VGT% is a command and not what the actual vanes are doing it's a tough call.
Shouldn't normally see either 85% or 15% at any given time. Although some have perfectly fine running engines and will see 85% occasionally at idle.
What is your max boost and do you experience any abnormal turbo lag? Black smoke?
Josh
Elder User
Joined: Aug 2006
Posts: 642
Likes: 0
From: Olathe, KS
I may sound like a broken record on this, but EBP readings compared to VGT% command should tell you if the vanes are stuck.
On the EGT temp. Personally, don't care to have the oil in the turbo sitting in 400 deg. I also block up the rad. Slows EGT cooling in the winter, however dropped faster with each exhaust tweak.
Just a stab in the dark, could anything have changed in the exhaust further back causing a restriction now? Muffler/Cat... Are EGTs otherwise normal for ya?
On the EGT temp. Personally, don't care to have the oil in the turbo sitting in 400 deg. I also block up the rad. Slows EGT cooling in the winter, however dropped faster with each exhaust tweak.
Just a stab in the dark, could anything have changed in the exhaust further back causing a restriction now? Muffler/Cat... Are EGTs otherwise normal for ya?
Thread Starter
|
Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
I may sound like a broken record on this, but EBP readings compared to VGT% command should tell you if the vanes are stuck.
On the EGT temp. Personally, don't care to have the oil in the turbo sitting in 400 deg. I also block up the rad. Slows EGT cooling in the winter, however dropped faster with each exhaust tweak.
Just a stab in the dark, could anything have changed in the exhaust further back causing a restriction now? Muffler/Cat... Are EGTs otherwise normal for ya?
On the EGT temp. Personally, don't care to have the oil in the turbo sitting in 400 deg. I also block up the rad. Slows EGT cooling in the winter, however dropped faster with each exhaust tweak.
Just a stab in the dark, could anything have changed in the exhaust further back causing a restriction now? Muffler/Cat... Are EGTs otherwise normal for ya?
Elder User
Joined: Aug 2006
Posts: 642
Likes: 0
From: Olathe, KS
Set aside WOT and very large power changes. Driving easy you should see the EBP values be somewhat consistent. Like in the range of 23.xx I do not know if the value varies much truck by truck. VGT% will vary to hold the EBP somewhat in that area. Definitely if you see VGT% change and do not see EBP follow then I would suspect stuck.
When letting off the throttle EBP will drop and VGT% will but up to bring it back and both settle.
Hope that makes sense.
When letting off the throttle EBP will drop and VGT% will but up to bring it back and both settle.
Hope that makes sense.
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Thread Starter
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Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
Set aside WOT and very large power changes. Driving easy you should see the EBP values be somewhat consistent. Like in the range of 23.xx I do not know if the value varies much truck by truck. VGT% will vary to hold the EBP somewhat in that area. Definitely if you see VGT% change and do not see EBP follow then I would suspect stuck.
When letting off the throttle EBP will drop and VGT% will but up to bring it back and both settle.
Hope that makes sense.
When letting off the throttle EBP will drop and VGT% will but up to bring it back and both settle.
Hope that makes sense.
Thread Starter
|
Laughing Gas
Joined: Jan 2012
Posts: 1,103
Likes: 1
From: Lakeland, TN
Catless, but need to check the air filter. Good thought.
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 242
From: Saratoga Springs,UT
I hear you on the thought of letting 400° Oil sit in the turbo
That thought did cross my mind the other day
So on that note I'm sure one you guys have one of those cool laser temperature guns would one of you be willing to take the temperature of the turbo itself and then compare it to your EGT gauge
I get the feeling that the temperature of the EGT gauge compared to the temperature of the turbo itself is going to be quite a bit different
Another thing to think about is the placement of the EGT probe itself is a pre-turbo or post turbo
That thought did cross my mind the other day
So on that note I'm sure one you guys have one of those cool laser temperature guns would one of you be willing to take the temperature of the turbo itself and then compare it to your EGT gauge
I get the feeling that the temperature of the EGT gauge compared to the temperature of the turbo itself is going to be quite a bit different
Another thing to think about is the placement of the EGT probe itself is a pre-turbo or post turbo
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 242
From: Saratoga Springs,UT
And even though and EGT gauge is an aftermarket modification you still can compare it to all the other temperature gauges to verify the accuracy of the gauge itself after a cold so just like you would any other temperature gage
Posting Guru
Joined: Dec 2012
Posts: 2,169
Likes: 3
From: SW Florida
If your EGT's are 400* when you shut it down, your oil isn't 400*. If that were true, what happens when we're pulling a hill with a load, and EGT's hit 12-1300?
Guess I need to make a video with the infared thermometer.
Guess I need to make a video with the infared thermometer.