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  1. #1
    Jays Audi Turbo's Avatar
    I Love Boost :-)

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    Question Forge Motorsport

    Has anyone fitted this to there a3 and if so were is it located and whats it do

    Secondary Air System Blanking Plate

    and has any one fitted this and does anyone have some pics of it fitted

    VAG MAP sensor mounting tube

    Jay
    Last edited by jojo; 31st January 2010 at 14:47.

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  3. #2
    jojo's Avatar
    S3 Drift King!

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    Quote Originally Posted by Jays Audi Turbo View Post
    Has anyone fitted this to there a3 and if so were is it located and whats it do

    Secondary Air System Blanking Plate


    Jay
    SAI Removal Guide



    99' Audi S3(APY) - Brilliant Black Click>>>Going Sideways vid!
    You've got to have a laugh! For Sale:LCR Brakes - £400



  4. #3
    Jays Audi Turbo's Avatar
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    Quote Originally Posted by jojo View Post
    Thanks for the guide m8 but what does it improve once fitted

  5. #4
    5th Gear

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    no improvements mate, the secondary air injection pump is a common failure on these cars, unsure why, but the car will run unaffected if removed, the later model of s3's ie amk and bam engines dont have these at all as audi realised they are pretty pointless

    couple hours work to remove, see my guide as jojo posted if you going to have a go at it

  6. #5
    <tuffty/>'s Avatar
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    SAI is there for controlling emissions (adds air to the exhaust on sold start), typically VAG approach with solonoid valves and rubber hoses that just split and leak all over the place. Typically its fine to remove but leave the solenoids etc electrically connected to stop fault codes etc...

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  7. #6
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    tuffty, how exactly does the sai work, one pipe airbox to pump then another pipe pump to combi valve/block

    it either draws cold air into the engine from air box, or pumps warm air into air box from engine?

    cant see how its supposed to warm your cat up quicker?

  8. #7
    <tuffty/>'s Avatar
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    Wasn't sure exactly so after a bit of googling, the secondary air system is an emission related system that injects extra oxygen into the exhaust pipe to burn off any extra fuel. The system only activates on cold starts (when the coolant temperature is between 15 and 35 degrees Celsius). The system consists of a large air pump, one or two combi-valves and a solenoid. The valves are controlled via vacuum lines that cause them to open and close.

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  9. #8
    Jays Audi Turbo's Avatar
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    Whats the n249 bypass mod its mentioned on the sai removal guide

  10. #9
    <tuffty/>'s Avatar
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    Quote Originally Posted by Jays Audi Turbo View Post
    Whats the n249 bypass mod its mentioned on the sai removal guide
    N249 valve is used by the ECU to control actuation of the DV. Normally the DV only needs to be opened when it sees vacuum (changing gear for example) but the N249 is used to allow the ECU to vent boost when 'it' wants...

    Bypassing the N249 (known as 'deleting') improves the response time of the DV but 'can' lead to boost spikes particulary on smaller turbos...

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  11. #10
    5th Gear

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    Quote Originally Posted by Jays Audi Turbo View Post
    Whats the n249 bypass mod its mentioned on the sai removal guide
    check this out:
    http://www.audi-sport.net/vb/showthr...-same-for-many)

 

 

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