Turbo problems. please help.

[JANNETTYRACING]

Originally Posted by TurboneticsRA

Try disconnecting the vacuum lines from the wastegate and see if this helps as it should be just spring pressure with no electronic variables. It is not uncommon for the solenoids in EBC's to malfunction. Feel free to email me direct at rawakim@turboneticsinc.com

NO Disrespect sir, but that would send his engine in to a serious over boost situation.

The lines to the Wastegate are Not Vacuum Lines.

They are boost Signal Lines to blow the wastegate Open to control boost.

Disconnecting them is a serious NO NO.

I suggest running a line directly from the turbine housing to the wastegate with No boost controller to make sure the boost returns to normal.

I am sure this was just a typo but a dangerous one.

Ted.

[TurboneticsRA]

Originally Posted by JANNETTYRACING

NO Disrespect sir, but that would send his engine in to a serious over boost situation.

The lines to the Wastegate are Not Vacuum Lines.

They are boost Signal Lines to blow the wastegate Open to control boost.

Disconnecting them is a serious NO NO.

I suggest running a line directly from the turbine housing to the wastegate with No boost controller to make sure the boost returns to normal.

I am sure this was just a typo but a dangerous one.

Ted.

None taken, I was referring to the removal of the lines for the boost controller in order to bypass. Run "boost signal" to the bottom port, leave top port open to atmosphere.

[JANNETTYRACING]

Originally Posted by TurboneticsRA

None taken, I was referring to the removal of the lines for the boost controller in order to bypass. Run "boost signal" to the bottom port, leave top port open to atmosphere.

I figured you typed it too fast LOL

But the way it was worded it could have been catastrophic for many.

Ted.

[stevieturbo]

Find a reputable tuner before you blow the thing to bits and cost yourself a fortune.

[dreksnot]

Originally Posted by stevieturbo

Find a reputable tuner before you blow the thing to bits and cost yourself a fortune.

YES!

[RobRiot88]

Thanks for the input everyone. I did find and fix a cut on one of the wastegate vacuum lines. tried again and it still had some issues. No doubt the motor has been taking a beating from this. Which concerns me a lot being that it was just built after it melted a piston. Now i found the reference line disconnected from the intake manifold. how do i have the worst luck with this. Before i can see if this fixed all my problems i have to replace the bolts where my driveshaft/differential meet because apparently they dont like to stay in one peice.

[stevieturbo]

Originally Posted by RobRiot88

Thanks for the input everyone. I did find and fix a cut on one of the wastegate vacuum lines. tried again and it still had some issues. No doubt the motor has been taking a beating from this. Which concerns me a lot being that it was just built after it melted a piston. Now i found the reference line disconnected from the intake manifold. how do i have the worst luck with this. Before i can see if this fixed all my problems i have to replace the bolts where my driveshaft/differential meet because apparently they dont like to stay in one peice.

Reference line for what ? The controller, the gates ?

either way, any hose not connected where it should is a problem.

It may just be an annoying problem or it could be a destructive problem depending on exactly what it is doing...or should be doing.

[RobRiot88]

it was for the controller. silly little things i would have never guessed could make such a big difference. i think i'e got it right but i wont know till i put the rear back together.

[stevieturbo]

If the controller doesnt receive a boost signal from the inlet manifold ( ideally this should be a dedicated line ). Then it will never do anything.

However, you should have the gate etc plumbed so that in this scenario it should just run at spring pressure anyway and be totally safe.

So something still isnt right with how it is configured if it isnt doing that

[SSE 4 2SS]

Originally Posted by stevieturbo

If the controller doesnt receive a boost signal from the inlet manifold ( ideally this should be a dedicated line ). Then it will never do anything.

However, you should have the gate etc plumbed so that in this scenario it should just run at spring pressure anyway and be totally safe.

So something still isnt right with how it is configured if it isnt doing that

Agreed, this should be a dedicated line... Additionally, make sure all vacuum. Connections are good. Depending on what size line your dealing with, any "vacuum" line blowing off when you go into boost can cause you to loose boost reference.. And spike your boost levels. If the car is tuned to the inth and you are at the max of your fuel system, you can quickly create a lean condition.

[Frans96ss]

Originally Posted by JANNETTYRACING

NO Disrespect sir, but that would send his engine in to a serious over boost situation.

The lines to the Wastegate are Not Vacuum Lines.

They are boost Signal Lines to blow the wastegate Open to control boost.

Disconnecting them is a serious NO NO.

I suggest running a line directly from the turbine housing to the wastegate with No boost controller to make sure the boost returns to normal.

I am sure this was just a typo but a dangerous one.

Ted.

Not sure what you mean by this but running no Vacuum lines to the top of the waste gate will make it run on spring pressure only...

The way you increase boost is by restricting the vacuum going to the waste gate.... He can take the vacuum lines off the top of the gate all day and it would not over boost.

[stevieturbo]

Originally Posted by Frans96ss

Not sure what you mean by this but running no Vacuum lines to the waste gate will make it run on spring pressure only...

The way you increase boost is by restricting the vacuum going to the waste gate.... He can take the vacuum lines off all day and it would not over boost.

Calling them "vac" or indeed boost can be misleading.

They are pressure control lines. Some people take this signal from the intake, so it will see both vacuum and boost.

Unless you're running a very very soft spring in the gate, removing the signal line will cause an overboost situation, as there is no pressure acting on the diaphragm to open the gate and reduce boost.

As for increasing or decreasing boost and how it is achieved. There are multiple ways and will depend how you have the gate and any control solenoids plumbed in.

[Frans96ss]

Originally Posted by stevieturbo

Calling them "vac" or indeed boost can be misleading.

They are pressure control lines. Some people take this signal from the intake, so it will see both vacuum and boost.

Unless you're running a very very soft spring in the gate, removing the signal line will cause an overboost situation, as there is no pressure acting on the diaphragm to open the gate and reduce boost.

As for increasing or decreasing boost and how it is achieved. There are multiple ways and will depend how you have the gate and any control solenoids plumbed in.

If you take the controller out of the equation the wastegate spring will open/close solely on spring pressure. No vacuum/boost assistance.

In order to cause an "overboost" Situation you would need boost on top of the wastegate to hold it closed

[stevieturbo]

Originally Posted by Frans96ss

If you take the controller out of the equation the wastegate spring will open/close solely on spring pressure. No vacuum/boost assistance.

In order to cause an "overboost" Situation you would need boost on top of the wastegate to hold it closed

No. Normal operation is usually with boost pushing against the diaphragm to open the valve AND exhaust back pressure acting on the face of the valve.

But by comparison EGBP has nowhere near the same force. So a 5psi spring would take a lot more than 5psi EGBP to push the valve open, depending on the size of the valve.
So you could easily see 10, 15, 20psi or more if you choose not to use the top can of the gate at all.

So no, "overboost" is a loss of control either way. Removal of signal lines that are supposed to be in place will cause a loss of control.

But again there are many ways to configure and plumb the gate for control, and each way will operate differently.