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2009-2014 Cadillac CTS-V Performance Mods Discussion, ZL1 supercharger lid in Cadillac CTS-V Series Forum - 2009-2014; The ZL1 brick is more airflow efficient, resulting in a smaller pressure drop across it. This translates into almost one ...
  1. #16
    Da V-Man is offline Cadillac Owners Fanatic
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    Re: ZL1 supercharger lid

    The ZL1 brick is more airflow efficient, resulting in a smaller pressure drop across it. This translates into almost one pound more boost in the plenum, which will result in close to 20 HP increase.

  2. #17
    Luna. is offline Cadillac Owners Connoisseur
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    Re: ZL1 supercharger lid

    From Tony Roma, ZL1's Program Engineering Manager:

    Much of the ZL1's power increase over the CTS-V's 556 hp comes courtesy of efficiency gains found in the LSA's air-to-liquid intercooler.
    "Compared to the CTS-V, the intercooler brick had to be pushed forward in the ZL1," Roma explains. "And because we ended up redoing the whole thing, we decided to optimize it."

    The team analyzed the tube-and-fin cooler's water flow rate on both sides, the water flow rate through the tubes, and the airflow rate at the other side. The brick's dimensions and its fin pitch were optimized for pressure drop on the air side, as well as on the water circuit. And the pump and heat exchanger sizes were adjusted--the former thanks to Chevy's "hot rod" Volt.

    "The ZL1's intercooler is incredibly efficient, and it keeps the intake air temps in the range where the engine keeps making great power," Roma says proudly.

  3. #18
    cruiser68 is offline Cadillac Owners Enthusiast
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    Re: ZL1 supercharger lid

    Could you give us a little more detain there Luna

    Thanks for the DETAILED explanation.

  4. #19
    stl_ls1gto is offline Cadillac Owners Fanatic
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    Re: ZL1 supercharger lid

    Quote Originally Posted by Luna. View Post
    From Tony Roma, ZL1's Program Engineering Manager:

    Much of the ZL1's power increase over the CTS-V's 556 hp comes courtesy of efficiency gains found in the LSA's air-to-liquid intercooler.
    "Compared to the CTS-V, the intercooler brick had to be pushed forward in the ZL1," Roma explains. "And because we ended up redoing the whole thing, we decided to optimize it."



    The team analyzed the tube-and-fin cooler's water flow rate on both sides, the water flow rate through the tubes, and the airflow rate at the other side. The brick's dimensions and its fin pitch were optimized for pressure drop on the air side, as well as on the water circuit. And the pump and heat exchanger sizes were adjusted--the former thanks to Chevy's "hot rod" Volt.

    "The ZL1's intercooler is incredibly efficient, and it keeps the intake air temps in the range where the engine keeps making great power," Roma says proudly.
    so based on this explanation, we are not changing the intercooler brick, just the lid. So how do we see the same gains on our cars vs the LSA in the camero?

  5. #20
    Da V-Man is offline Cadillac Owners Fanatic
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    Re: ZL1 supercharger lid

    Quote Originally Posted by stl_ls1gto View Post
    so based on this explanation, we are not changing the intercooler brick, just the lid. So how do we see the same gains on our cars vs the LSA in the camero?
    The IC brick is included as part of the ZL1 lid assembly.

  6. #21
    Moparman4444 is offline Cadillac Owners Enthusiast
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    Re: ZL1 supercharger lid

    Now that makes sense to me. Is the ZL1 a direct replacement or does it involve a bunch of Mickey Mouse tweaks to get it to work besides grinding the front edge which is no big deal. In other words, what about changing intercooler lines, rerouting lines, fabricating brackets and the like.

  7. #22
    baabootoo's Avatar
    baabootoo is offline Cadillac Owners Connoisseur
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    Re: ZL1 supercharger lid

    I'm still not sure about the Camaro's numbers. Either theirs are high, or ours are low. I can't find any consistent tests where they repeatedly beat our trap speed in the 1/4.

  8. #23
    PetroCTS-V's Avatar
    PetroCTS-V is offline Cadillac Owners Member
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    Re: ZL1 supercharger lid

    Tune Time drilled and tapped the lid for AN fittings, plumbed to a Norcal Tank.







    Here is a pic of the Lid with the ZL1 engine cover on my V painted to match Crystal Red. The cover does touch the lining under the hood. I'm planning on a WeaponX hood in the near future.

    Club Malibu likes this.

  9. #24
    Trapspeed's Avatar
    Trapspeed is offline Cadillac Owners Connoisseur
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    Man, that looks sooooo much nicer, too.

  10. #25
    PetroCTS-V's Avatar
    PetroCTS-V is offline Cadillac Owners Member
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    Re: ZL1 supercharger lid

    ^
    Thank you.

    I want to paint the brace the same color as the cover too.

  11. #26
    cruiser68 is offline Cadillac Owners Enthusiast
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    Re: ZL1 supercharger lid

    PetroCTS-V, your engine bay makes mine look like the anti-christ. Raw would be an understatement as I have all covers ripped off. Looks more like a track car. Yours looks beautiful! Must have taken lots of time.

  12. #27
    iVwishing's Avatar
    iVwishing is offline Cadillac Owners Member
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    Re: ZL1 supercharger lid

    In in for a ZL1 lid when available. Thanks Luke!

  13. #28
    PetroCTS-V's Avatar
    PetroCTS-V is offline Cadillac Owners Member
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    Re: ZL1 supercharger lid

    Quote Originally Posted by cruiser68 View Post
    PetroCTS-V, your engine bay makes mine look like the anti-christ. Raw would be an understatement as I have all covers ripped off. Looks more like a track car. Yours looks beautiful! Must have taken lots of time.
    Thank you.

    I track my car on occasion. Mainly 1/4 mile but I'm always in the engine compartment looking it over. I'm kind of neurotic that way. lol

    It's easy to keep clean if you stay on it.

  14. #29
    1Sensei is offline Cadillac Owners Fanatic
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    Re: ZL1 supercharger lid

    Anyone did a comparison of the lids at the track? What is the real world gain just with adding the lid at the track not dyno? I would like to see that number.

  15. #30
    Moparman4444 is offline Cadillac Owners Enthusiast
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    Re: ZL1 supercharger lid

    if your already making over 600whp, you probably won't feel a 20hp improvement but you could see it in track times. If nothing else, it should improve the engines efficiency. Im going to all water/meth injection this spring.

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