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School me on stock wastegate operation, oddjob, CW, Sid etc

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Old 03-12-2014, 02:21 AM
  #31  
mahoney944
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Originally Posted by F1nd3r05
After reading this thread and the other one that I started I don't understand something. If clamping the line should make the turbo boost with zero control say to even 50psi (exaggerating) why is it that when i clamp mine i can floor it through the entire powerband and have it hit a maximum of only 15psi?
this is easily explained. the wastegate is faulty. probably stuck open partly allowing constant leak of exhaust pressure to bypass the turbo.
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Old 03-12-2014, 02:23 AM
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Originally Posted by F1nd3r05
After reading this thread and the other one that I started I don't understand something. If clamping the line should make the turbo boost with zero control say to even 50psi (exaggerating) why is it that when i clamp mine i can floor it through the entire powerband and have it hit a maximum of only 15psi?
What's happening is your factory wastegate spring is weak and it's opening by itself. You will get flat boost because your turbo is huge! If your wastegate worked correctly, you should have seen more boost pressure.

Originally Posted by mahoney944
its funny that you ask for a valued opinion, chris gives you one and you ignore it lol because he agreed with what ive said 20 times now
you keep changing your theories. go read the other thread. we've all said the same thing before. Louis and i where taking about FACTORY wastegates and concerning the OP situation.
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Old 03-12-2014, 02:25 AM
  #33  
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Originally Posted by F1nd3r05
After reading this thread and the other one that I started I don't understand something. If clamping the line should make the turbo boost with zero control say to even 50psi (exaggerating) why is it that when i clamp mine i can floor it through the entire powerband and have it hit a maximum of only 15psi?
because moroni944 believes that a boost spike on a pinched line is the same as sustaining 21psi.

your wastegate is fully opening by the back pressure, your spring is tired and worn, simple. if you were using a tial that would be another scenario yes you could see boost as high as your turbo can produce
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Old 03-12-2014, 02:26 AM
  #34  
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Originally Posted by Paulyy
What's happening is your factory wastegate spring is weak and it's opening by itself. You will get flat boost because your turbo is huge! If your wastegate worked correctly, you should have seen more boost pressure.



you keep changing your theories. go read the other thread. we've all said the same thing before. Louis and i where taking about FACTORY wastegates and concerning the OP situation.
I have not changed my theories once. I reccommend the OP bench test the wastegate or simply orders a new one. Clamping the line will cause max boost, if it doesnt the valve is stuck open.
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Old 03-12-2014, 02:29 AM
  #35  
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Originally Posted by lart951
because moroni944 believes that a boost spike on a pinched line is the same as sustaining 21psi.

your wastegate is fully opening by the back pressure, your spring is tired and worn, simple. if you were using a tial that would be another scenario yes you could see boost as high as your turbo can produce
For the record ive run 20 psi on the stock wastegate before. they can handle it, not recommended but they can.
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Old 03-12-2014, 02:29 AM
  #36  
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Thanks guys
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Old 03-12-2014, 02:33 AM
  #37  
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Originally Posted by mahoney944
For the record ive run 20 psi on the stock wastegate before. they can handle it, not recommended but they can.
lol, for how long? where is the proof?
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Old 03-12-2014, 02:33 AM
  #38  
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Originally Posted by lart951
It’s a fact that stock wastegates start to bleed around 7 psi, this will not occur in a tial since the valve is designed to open against the back pressure.
A tial opens with the flow of back pressure as well. the difference is a tial push shut and a stock one pulls shut
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Old 03-12-2014, 02:36 AM
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Originally Posted by lart951
lol, for how long? where is the proof?
did it for years before upgrading to a lr duel port
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Old 03-12-2014, 02:44 AM
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Originally Posted by mahoney944
A tial opens with the flow of back pressure as well.
OMG serious how ??

STOCK WASTEGATE OPERATION
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Old 03-12-2014, 02:48 AM
  #41  
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Lindsey Racing dual port does not flow the same as the tial, are they both dual port yes, but the LR uses the stock lower casting with the valve configuration same as stock.
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Old 03-12-2014, 02:50 AM
  #42  
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heres the difference champ. the tial pushes shut preventing exhaust flow from entering the wg exhaust chamber when it opens the valve is pulled into the body, which is the same direction as the exhaust is flowing.

on a stock one th exhaust is allowed to enter the chamber at all times. the valve is pulling up holding the pressure inside the chamber, when it opens the valve slides out and the flow of exhaust moves in the same direction its opening

this is why the tile mount opposite of the stock and lr.
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Old 03-12-2014, 02:52 AM
  #43  
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Originally Posted by mahoney944
heres the difference champ. the tial pushes shut preventing exhaust flow from entering the wg exhaust chamber when it opens the valve is pulled into the body, which is the same direction as the exhaust is flowing.

on a stock one th exhaust is allowed to enter the chamber at all times. the valve is pulling up holding the pressure inside the chamber, when it opens the valve slides out and the flow of exhaust moves in the same direction its opening

this is why the tile mount opposite of the stock and lr.
Originally Posted by mahoney944
A tial opens with the flow of back pressure as well. the difference is a tial push shut and a stock one pulls shut
Really? we didn't know this.

I didn't mention that, or showed diagrams on how the factory wastegate works.


What tile? Floor tile?
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Old 03-12-2014, 02:54 AM
  #44  
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Originally Posted by Paulyy
Really? we didn't know this.

I didn't mention that, or showed diagrams on how the wastegate works.
lol apparently not since lart is disagreeing maybe you two should collect your thoughts and try again.
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Old 03-12-2014, 02:57 AM
  #45  
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Originally Posted by mahoney944
lol apparently not since lart is disagreeing maybe you two should collect your thoughts and try again.
no, He's correct.

The Tial and the LR dualports are different. Not to mention the diaphragm is different. The 2 ports on the diaphragm are oppisite to eachother

The LR the valve exits the ports while the tials valve goes into the port.
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