Ford Power Stroke Nation banner

1 - 7 of 7 Posts

·
Registered
Joined
·
20 Posts
Discussion Starter #1
What happens when you unplug the vgt I have a 06 6.0 6spd and I get tired of it shutting on and off and I know unplugging it makes a stupid smoke switch witch I don't care about I'm jw if leaving it unplugged will damage or hurt anything
 

·
Registered
Joined
·
1,419 Posts
It all depends on where the vanes are when you unplug it. Read up on how it functions and you will understand how it can be a poor idea or a very bad idea. I can't really think of a time it would be good. Anyway....if you disconnect it when the vanes are letting a majority of the exhaust bypass the turbine, then you will get your normal boost when the engine is revving high, but you won't have squat for power down low. If you disconnect it when most of the exhaust is flowing through the turbine, you will get great boost down low, but you will get an overboost condition up high. There is potentially a sweet spot somewhere in the middle which might give you some power down low, while not overboosting you up top, but why sit and play with it over and over? It's designed as variable for a reason....to give you the best boost possible at any given throttle/RPM/load situation. Are there better turbos which are not VGT? Sure, but they're typically installed when someone has a lot of work done to the engine and need more boost/flow than the stock turbo can handle. Also, your turbo is not shutting on and off. It is sweeping the vanes back and forth, kind of like a windshield wiper, in an effort to clear off the soot and prevent the vanes from getting stuck. A normal preventive maintenance built into the programming. A feature which can, and has been in some cases, be removed with a custom tune if it really bothers you that much. You will get rid of the up and down whine at idle while retaining the benefits of the VGT.
 

·
Registered
Joined
·
3,688 Posts
Pretty well said.
If the vgt is bothering you that much, maybe you shouldn't own a diesel with one. Lol
Or... yours needs a good cleaning.

Sent from my SM-N960U using Tapatalk
 

·
Master BS'er
Joined
·
5,931 Posts
The exhaust actually doesn't bypasses the turbine in a vgt type turbo. It just gives the exhaust a little boost of speed for quicker response. The vgt solenoid changes the speed of the exhaust striking the turbine by changing the angle of the Vanes. Vanes closed increases the speed, but the volume is low. Vanes open is just the opposite.

I would assume it defaults to one side if it unplugs since it is a duty cycle type solenoid, but that's just a guess. Still don't see how it would be desirable to unplug it. It would be a dog.
 

·
Registered
Joined
·
3,688 Posts
It will default to the open position. Which is exactly how the "smoke switch" works........

Sent from my SM-N960U using Tapatalk
 

·
Registered
Joined
·
3,688 Posts
What's a smoke switch?
I see you saw the other thread.
Basically just cuts the power to the vgt solenoid, letting it "open" the veins.

Sent from my SM-N960U using Tapatalk
 
1 - 7 of 7 Posts
Top