"The BIG BOV thread" (Where all bov question threads get merged) - Page 182
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This is a discussion on "The BIG BOV thread" (Where all bov question threads get merged) within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; I always associated a fluttery BOV with one that is sticking open. Can you be more specific?...

  1. #2716
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    I always associated a fluttery BOV with one that is sticking open. Can you be more specific?
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  3. #2717
    Registered User XspudX's Avatar
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    Well, I have a video of an Mr2 doing a hot lap and it has the flutter sound. Also, the 2F2F Skyline has that flutter sound.

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    Kinda like a bus?...i think thats the greddy type s

  5. #2719
    Registered User TrekWRX SST's Avatar
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    I have a Blitz bov and inluess I goose it pretty good it flutters instead of the clean air blast sound you get at the higher boost levels. I played with the tension try that. Not sure how many bov's have adjustments though?
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  6. #2720
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    The ralley WRXs have the bov that flutters...what do they use?

    It sounds like a dolphine
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  7. #2721
    Registered User CKxx's Avatar
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    It really depends on the adjustment, and the amount of airflow.

    My SSQV sounds like a blast of air at 14psi, but on my friends VF30 car at 14psi it makes the birdman noise. "Pfrrrrrrrrr"
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  8. #2722
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    I dont like that sound really i want the pure air sound more.

  9. #2723
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    This guy I know got the mazdaspeed protege and he made the stock bov atmospheric and it sounds like a damn turkey lol..

  10. #2724
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    The fluttering and chirping sound on the WRC cars in the ALS -- Anti-lag system. I am not going to go into ALS in detail, but it uses the ECU (exhaust valve timing IIRC) to keep the turbo spooled. Generally a turbo will not last very long with an ALS system running -- therefore it is not so good to run on the street.

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  11. #2725
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    Originally posted by NJwrbT-WRX
    The fluttering and chirping sound on the WRC cars in the ALS -- Anti-lag system. I am not going to go into ALS in detail, but it uses the ECU (exhaust valve timing IIRC) to keep the turbo spooled. Generally a turbo will not last very long with an ALS system running -- therefore it is not so good to run on the street.

    -joe
    Yeah, ALS are the shiznit.

  12. #2726
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    Cross-threaded BOV bolt = no more threads!

    ummm whoops!

    So im putting my IC back on, and was kind of in a rush to get it done. I ended up crossthreading one of the BOV bolts. I backed it out, and ended up with a handful of aluminum threads.

    The other BOV bolt is holding the BOV down for now. It seems to be sealing. I was thinking about drilling out the hole, re-tapping it for a larger bolt, and putting a larger bolt in. Good idea?
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  13. #2727
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    Re: Cross-threaded BOV bolt = no more threads!

    Originally posted by Shibby
    ummm whoops!

    So im putting my IC back on, and was kind of in a rush to get it done. I ended up crossthreading one of the BOV bolts. I backed it out, and ended up with a handful of aluminum threads.

    The other BOV bolt is holding the BOV down for now. It seems to be sealing. I was thinking about drilling out the hole, re-tapping it for a larger bolt, and putting a larger bolt in. Good idea?
    more like the only idea unless you can find yourself a good metric helicoil set somewhere, maybe they have them at sears?
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  14. #2728
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    Re: Re: Cross-threaded BOV bolt = no more threads!

    Originally posted by supermarkus
    more like the only idea unless you can find yourself a good metric helicoil set somewhere, maybe they have them at sears?
    what is this? how does it work?
    --Jason-- 2004 MT WRB WRX
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    "This is my WRX. There are many others like it, but this one is mine. My WRX is my best friend. It is my life. I must master my WRX as I must master my life. Without me, my WRX is useless. Without my WRX, I am useless."

  15. #2729
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    they're replacement threads you screw into place, your local sears or autozone should have them. Might as well go for the tap though.

    you drill a slightly oversized hole, which you've effectively done, then tap with an over sized tap and screw the replacement threads into place.

    do a google search on "helicoil repair kit"
    Last edited by supermarkus; 01-19-2004 at 09:35 PM.
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  16. #2730
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    Originally posted by supermarkus
    they're replacement threads you screw into place, your local sears or autozone should have them. Might as well go for the tap though.

    you drill a slightly oversized hole, which you've effectively done, then tap with an over sized tap and screw the replacement threads into place.

    do a google search on "helicoil repair kit"
    They work, believe me. But be careful since you are working with aluminum(intercooler), and not steel when using the helicoil repair kit. Aluminum is a soft metal and will strip easily. Make sure you are careful intalling the helicoil. If it strips, you are pretty much SOL!

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