Lingenfelter CAI filter
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2004-2007 Cadillac CTS-V Performance Mods Discussion, Lingenfelter CAI filter in Cadillac CTS-V Series Forum - 2004 - 2007; What position does everyone have the K&N filter in on their Lingenfelter CAI? Horizontal or angled? Anyone else get a ...
  1. #1
    AmesCTS-V's Avatar
    AmesCTS-V is offline Cadillac Owners Enthusiast
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    Lingenfelter CAI filter

    What position does everyone have the K&N filter in on their Lingenfelter CAI? Horizontal or angled?

    Anyone else get a whistle? I've had whistles with CAI's in the past and just ignored them, but this one is annoying, a little too loud and a real whistle type pitch.
    12 CTS-V | 12 SRX | 09 Z06 | 08 C6 Z51
    05 CTS-V | 04 GTO (Sold)

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  3. #2
    heavymetals's Avatar
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    Re: Lingenfelter CAI filter

    The incomming air doesn't care what angle the filter is at (yeah mine is angled).

    As for whistles, yeah mine does that to.

    Whines to, but I am sure that is the maggie!

  4. #3
    lawfive's Avatar
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    Re: Lingenfelter CAI filter

    Pretty straight here. I can really only detect the whistle when the window is open and I step on it hard.

  5. #4
    BowenCT's Avatar
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    Re: Lingenfelter CAI filter

    Not to psyched to hear that these kits whistle. Can we get a testament from a few other LPE users out there, please? I have a LPE kit in the box but haven't gotten around to installing it...........if she whistles substantially, she may not go on at all.

  6. #5
    HDMLNIUM's Avatar
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    Re: Lingenfelter CAI filter

    Quote Originally Posted by lawfive
    Pretty straight here. I can really only detect the whistle when the window is open and I step on it hard.
    Same here, pretty straight and maybe a very faint whistle if I am really listening for it.. Nothing that would bother anyone that I could see...

    Bill


  7. #6
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    Re: Lingenfelter CAI filter

    mine is straight also...but the whine is not that bad...especially not annoying..just love to hear the breathing of it when i punch it!!

  8. #7
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    Re: Lingenfelter CAI filter

    Quote Originally Posted by BowenCT
    Not to psyched to hear that these kits whistle. Can we get a testament from a few other LPE users out there, please? I have a LPE kit in the box but haven't gotten around to installing it...........if she whistles substantially, she may not go on at all.
    bowen i love mine..but the only problem with it is that the intake tub right before the air filter thins out. ..makes no sense..it has to ristrict max airflow..stealth v has one but doesnt have any replacement airintake tubes....his has a massive metal part there in which i want..still looking...

  9. #8
    CVP33's Avatar
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    Re: Lingenfelter CAI filter

    Mine is in at about 30* from flat. Mine wouldn't fit flat as Bill shows. No hiss, whine, burb or whistle. You do hear it gulping in the air at high RPM's though.

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    StealthV's Avatar
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    Re: Lingenfelter CAI filter

    Hypothesis - the whistle is caused by the divider panel not fully sealing against the hood liner. These gaps are at the ends of the TrimLok. Mine whistles - for now....

  11. #10
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    Re: Lingenfelter CAI filter

    Just installed mine last weekend. Angled a little like HDMLNIUM. No whistle that I could detect (yet) either driving with windows up or down. Couldn't be happier.

  12. #11
    Dennisscars's Avatar
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    Re: Lingenfelter CAI filter

    Quote Originally Posted by HDMLNIUM

    This is precisely why I have not put a CAI on. If it doesn’t seal COMPLETELY to the hood, more hot engine air is worse than less cool air. The forward gap is letting way too much underhood air in for my likey.


    My cowl induction on my ’71 Chevelle big block rubbed the paint off of the underside of the hood. If it's not rubbing the hoodliner I would make it rub.

  13. #12
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    Re: Lingenfelter CAI filter

    Quote Originally Posted by Dennisscars
    This is precisely why I have not put a CAI on. If it doesn’t seal COMPLETELY to the hood, more hot engine air is worse than less cool air. The forward gap is letting way too much underhood air in for my likey.


    My cowl induction on my ’71 Chevelle big block rubbed the paint off of the underside of the hood. If it's not rubbing the hoodliner I would make it rub.
    It seals enough that it's smashing my underhood liner a lot. You don't want seal in the front because cool air will come in the gap under the hood.
    12 CTS-V | 12 SRX | 09 Z06 | 08 C6 Z51
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  14. #13
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    Re: Lingenfelter CAI filter

    The seal is good against the hoodliner. The problem areas where the LPE does not seal against the hood are circled in green.

    Whistle while you work.

  15. #14
    Dennisscars's Avatar
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    Re: Lingenfelter CAI filter

    Air is pretty lazy, it will go the path of least resistance. Hot air = bad. :banghead2

  16. #15
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    Re: Lingenfelter CAI filter

    Quote Originally Posted by Dennisscars
    This is precisely why I have not put a CAI on. If it doesn’t seal COMPLETELY to the hood, more hot engine air is worse than less cool air. The forward gap is letting way too much underhood air in for my likey.
    I thought about this and put off adding the LPE intake for the same reason. Now that I have one I don't think it is much of an issue. My theroy is this: The installation process requires clearing out the area in front of the filter of the rubber boot. This opens the area in front of the filter to cold air. While the car is moving you are forcing cold air from in front of the car into the filter box. Any excess air forced into the filter area is pushed through the problem areas pointed out in Ricks diagram. A lot like blowing air out of your nose to prevent water from entering while swiming. I don't have proof that this is happening for a fact but it makes sense to me and my performance went up when I installed the LPE intake. So the benefit of the more open filter far out weighed any small amount of warm air that it may be sucking in if any at all. I am sure LPE has checked this out thoroughly.

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