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

boost spiking to 15psi

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Old Mar 15, 2003 | 03:45 PM
  #1  
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boost spiking to 15psi

Please read my mod list, but I just got done installing my RB full exhaust setup, and I was driving my car and my boost gauge spiked a couple of times to 15psi, but I quickly let off the gas. My question is, is there anything I can do to avoid this? I know 10-11psi is max on a stock fuel setup ,which is what I have.
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Old Mar 15, 2003 | 03:47 PM
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pei > caek
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I dont see a mod list anywhere. But port your wastegate.
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Old Mar 15, 2003 | 03:49 PM
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Yeah I realize that, damnit. Sometimes my mod list shows, and other times it doesn't. weird. Well I'm going to be upgrading to a s5 turbo, well that help?
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Old Mar 15, 2003 | 03:53 PM
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pei > caek
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Port the wastegate when you get the s5 turbo too.
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Old Mar 15, 2003 | 03:54 PM
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ok I was planning on it since i'll have it out anyways.
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Old Mar 15, 2003 | 03:55 PM
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after porting, bout how many psi should I be at?
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Old Mar 15, 2003 | 04:02 PM
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EIT
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what are the max EGT numbers you are seeing.
With a ported s5 wastegate I would imagine 9 pounds would be possible.
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Old Mar 15, 2003 | 10:24 PM
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I'm a boost creep...
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Read this thread.
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Old Mar 16, 2003 | 01:54 AM
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with full exhaust, and a stock waste gate, that boost is to be expected. You need to port the wastegate, and get bigger secondaries. at 11 psi you're really pushing those injectors.
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Old Mar 16, 2003 | 03:42 AM
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In 3rd or fourth gear it goes to 15psi with turbo connected straight to wastegate (lowest possible setting) this is on a s5 turbo, unported.
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Old Mar 16, 2003 | 10:25 AM
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Well obviously I need to bring those PSI numbers down to around 9-10. Because I haven't upgraded the fuel system yet.l
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