2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

any tips on porting the wastegate.

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Old Sep 19, 2007 | 11:28 PM
  #1  
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From: Sacramento
any tips on porting the wastegate.

Can any one who's experience that have ported the wastegate help me port mines? What necessary tools do i need? and what should i do step by step?
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Old Sep 20, 2007 | 12:14 AM
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From: eureka
here you go

http://www.luketech.eld101.com/About_Me.html


Is it s4 or s5?
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Old Sep 20, 2007 | 12:18 AM
  #3  
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From: Sacramento
Originally Posted by freemanrx7
s4
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Old Sep 20, 2007 | 12:31 AM
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From: eureka
My s4 manifold was cracked so I went s5


You could buy an s5 turbo hotside and s5 turbo manifold. Then combine the hotside with you s4 cold side. Just a thought.
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Old Sep 20, 2007 | 12:37 AM
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Originally Posted by freemanrx7
My s4 manifold was cracked so I went s5


You could buy an s5 turbo hotside and s5 turbo manifold. Then combine the hotside with you s4 cold side. Just a thought.
The s4 and s5 t2 turbos are the same except the exhaust housing and manifold.
for s5 turbo
1) I used some spray paint with the door closed so I couild get a decent idea or where the valve seated. Maybe Dicum and a scribe would b better, but I didnt have that available (you also might want ot keep in mind the amount of freeplay the bushing has, some are tighter than others)

2)leave about 2mm for the valve to seat, everything else grind down.

Remember not to go too thin between the 2 holes. Also, its mainly the smaller wastegate hole that needs porting
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Old Sep 20, 2007 | 12:48 AM
  #6  
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From: Sacramento
Originally Posted by initial D is REAL!
The s4 and s5 t2 turbos are the same except the exhaust housing and manifold.
for s5 turbo
1) I used some spray paint with the door closed so I couild get a decent idea or where the valve seated. Maybe Dicum and a scribe would b better, but I didnt have that available (you also might want ot keep in mind the amount of freeplay the bushing has, some are tighter than others)

2)leave about 2mm for the valve to seat, everything else grind down.

Remember not to go too thin between the 2 holes. Also, its mainly the smaller wastegate hole that needs porting
thanks i hope the porting doesn't go rocket sciense on me hahaha.
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Old Sep 20, 2007 | 01:08 AM
  #7  
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From: eureka
Originally Posted by lilaoboi90
thanks i hope the porting doesn't go rocket sciense on me hahaha.
What we're saying is for not much money you could go s5. But only if you may upgrade to standalone or more performance.
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Old Oct 10, 2007 | 11:52 PM
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GXL like a mofo
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From: Milton, PA
sorry to resurrect this thread, but i have a question about the S5 wastegate. How do you move the flapper enough to be able to port the hole underneath? I remember on my S4, the door swung wide open giving great access, but on this S5 turbo I have, it just opens a little.
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Old Oct 11, 2007 | 12:37 PM
  #9  
GXL like a mofo
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From: Milton, PA
bump for advice
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Old Oct 11, 2007 | 01:19 PM
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From: mass
Spray paint is a really good idea, never thought of that, Its pretty straight forward once you get it apart, I started with a drill bit then worked my way up to the next size. Make sure you get all the metal shavings out when your done.
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