SF Intake and Catless downpipe
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This is a discussion on SF Intake and Catless downpipe within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Is there any truth or info that running an SF Intake and catless downpipes makes me more susceptible to boost ...

  1. #1
    Registered User Chief_WRX's Avatar
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    SF Intake and Catless downpipe

    Is there any truth or info that running an SF Intake and catless downpipes makes me more susceptible to boost creep? I dont have emissions test where I live so catless is an option for me. I have read once or twice on various forums that people with an SF intake and a catless downpipe have seen boost creep more often then just a catless downpipe.

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    Registered User Mitch08WRX's Avatar
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    I ran (and still do) an Invidia catless downpipe with both the K&N typhoon and SF intake and have seen boost creep with both. I have been running the SF intake for the past 6 months or so. Just the other day I read over 22 PSI full throttle, not sure if the cold weather had any effect or not. I never had an issue in warm weather although.

  4. #3
    Registered User Chief_WRX's Avatar
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    Yeah thanks for the input what altitude are you at?!
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    Registered User Mitch08WRX's Avatar
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    I'm from Michigan, around 600 ft above sea level. Is this an issue? never looked into that lol

  6. #5
    Registered User Chief_WRX's Avatar
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    Yeah it can be. Cars at higher altitude make less boost. So there for they get boost creep but never exceed the target boost. For example map notes for the ap state max psi is 15. Here we might boost the 13.8 then have boost creep to 14.9 when its supposed to tapper off. A lot of people think they are okay when in reality they still have boost creep.

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  7. #6
    Registered User Mitch08WRX's Avatar
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    Gotcha, makes sense now. Thanks.

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