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2004-2007 Cadillac CTS-V Performance Mods Discussion, Does external oil cooler lower engine temps? in Cadillac CTS-V Series Forum - 2004 - 2007; If your big, powerful radiator is doing it's job, then ECT will be at the thermostat setting, so you'll never ...
  1. #16
    AAIIIC's Avatar
    AAIIIC is offline Moderator
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    Re: Does external oil cooler lower engine temps?

    If your big, powerful radiator is doing it's job, then ECT will be at the thermostat setting, so you'll never be able to see an improvement in ECT as a result of an external oil cooler. The t-stat will just be open slightly less to maintain that same ECT.

    And why would you need to relocate your oil filter to use a Laminova type heat exchanger? I think the real challenge in using one of those is figuring out where to put it such that you can route the full radiator flow through it. There's not a whole lot of room in the front of the engine bay to fit anything extra.
    '05 Stealth Grey CTS-V, Hyper Silver Linea Corse Venetos w/Continental ExtremeContact DWs (summer), black Team Dynamics ProRace 1.2 wheels with 275/35-18 R-compounds (track), Hyperblack Rota Torques (winter), KW Variant3s, V2 front brakes, Hotchkis rear sway bar, EPS cam, TEA-ported 243 heads, FAST92 intake w/LS2 TB, JBA Camaro/G8 1-3/4" shorty headers w/JBA cat pipes, Corsa exhaust, UUC motor and tranny mounts, UUC shifter, MAPerformance trailing arms, Specter cradle bushings, etc...

  2. #17
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    philistine is offline Cadillac Owners Enthusiast
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    Re: Does external oil cooler lower engine temps?

    Quote Originally Posted by AAIIIC View Post
    If your big, powerful radiator is doing it's job, then ECT will be at the thermostat setting, so you'll never be able to see an improvement in ECT as a result of an external oil cooler. The t-stat will just be open slightly less to maintain that same ECT.

    And why would you need to relocate your oil filter to use a Laminova type heat exchanger? I think the real challenge in using one of those is figuring out where to put it such that you can route the full radiator flow through it. There's not a whole lot of room in the front of the engine bay to fit anything extra.
    Sandwich plate filter augmentation. Yeah I haven't ripped the nose off to see what I'm dealing with. There's another shop that is gonna grab some data for me. It's to find the heat transfer rate and thermodynamic (heat in motion) study - pure curiosity.

  3. #18
    DavidBoren's Avatar
    DavidBoren is offline Cadillac Owners Enthusiast
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    Re: Does external oil cooler lower engine temps?

    Did that shop ever get back to you with their study results?

  4. #19
    philistine's Avatar
    philistine is offline Cadillac Owners Enthusiast
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    Re: Does external oil cooler lower engine temps?

    No, there has been no follow-up - the data would have come from a Mopar build or Mustang. I slapped this thing in my turbo s2k and the oil temps stay about 5-10F over engine coolant temps. During a spirited drive, mostly 50% throttle, as AAIIIC mentioned the cooling system was doing it's job and kept ECTs right at the T-stat with 185F touching lightly up to 200F during WOT. My oil temps stayed in that range.

    The ambient air temps were ~90F.

    So the comparison using my datalogs:
    No oil cooler
    hot idle: 210F
    part throttle: 220F
    WOT: 240F (260F peek autox)

    Laminova oil cooler
    hot idle: 185F
    part throttle: 190F
    WOT: 210F (peek w/autox)

    I used -10AN lines and have no pressure drops. All my monitoring was done using PLX devices and digitally fed into the Hondata Kpro ECU to record the additional sensors. Unfortunately I have no idea how this will perform in the CTS-V. It's compact and doesn't compete for air flow since it's water/oil heat exchanger. My only consideration would be for forced induction purposes.

  5. #20
    DavidBoren's Avatar
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    Re: Does external oil cooler lower engine temps?

    When I put the Alradco CTS-V radiator in my 3.6L CTS, I am going to replace my Hayden external tranny cooler with a liquid/liquid laminar flow (probably Laminova) cooler. I like the way they bring the fluid up to temperature as well as cooling it. I am also going to install an oil cooler of the same design at the same time. Granted, all of this will not be until next summer, but it is definitely on the list. Im not even considering forced induction on my LY7, I just like the thought of having everything regulated to the same temperature.

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