Fan blade upgrade
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2004-2007 Cadillac CTS-V General Discussion Discussion, Fan blade upgrade in Cadillac CTS-V Series Forum - 2004 - 2007; Which fan pulls more air, is it the 5 blade on the left or the 7 blade on the right? ...
  1. #1
    Naf's Avatar
    Naf
    Naf is offline Cadillac Owners Connoisseur
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    Fan blade upgrade

    Which fan pulls more air, is it the 5 blade on the left or the 7 blade on the right?

    I would like to upgrade the fan blades so i am coolin a bit more. Last yr my car was over tempin and i am goin through every thing to find out why, the rad was flushed several times and the headers wrapped. So far the only issue is the fan...

    Lookin forward to your replies

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  3. #2
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Fan blade upgrade

    Did you try a low temp thermostat an adjusted fan speeds via tune?

  4. #3
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    Re: Fan blade upgrade

    What radiator do you have?

    In what conditions was it "over tempin"?
    '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...

  5. #4
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    Re: Fan blade upgrade

    Naf? Is that you?

  6. #5
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    Re: Fan blade upgrade

    Quote Originally Posted by crankedupforit View Post
    Naf? Is that you?
    Hasn't burned up in the desert yet?

    Naf, I think you need a radiator....for your radiator. I can develop one for you. It will only be $42,793.67. You can send a deposit for 1/2 that amount to my Paypal account.

  7. #6
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    Re: Fan blade upgrade

    Lose the underdrive pulley and get an Evans water pump.

  8. #7
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    Re: Fan blade upgrade

    I did take care of the fan speeds for my new thermostat...

    I have the ron davis rad, and regular pulley.

    The over temp happens at low speeds with or without the AC on.

    Its fine at 185F as long as i am above 60mph, any speed lower and my temp climbs to 230F

    I have the new LS3 waterpump

    Evans waterpump is way too expensive, and the sellers wont deal with me for i am overseas...

  9. #8
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    Re: Fan blade upgrade

    With all the unconventional mods you've done, I'd say it's hard to know what's going on. What ambient conditions?
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

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    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Fan blade upgrade

    Are you running a 160 or 180 tstat?

  11. #10
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    Re: Fan blade upgrade

    Are your fans on factory settings? What is your coolant/water mix? Ambient temps? We're slowly started working on a new dual fan kit for the CTS-V but really I'm not sure that there's much demand for the application.

  12. #11
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    Re: Fan blade upgrade

    Quote Originally Posted by HAMSTAR View Post
    Are you running a 160 or 180 tstat?
    I am running a 180 stat

    Quote Originally Posted by alradco View Post
    Are your fans on factory settings? What is your coolant/water mix? Ambient temps? We're slowly started working on a new dual fan kit for the CTS-V but really I'm not sure that there's much demand for the application.
    I am running 180F settings, with 50/50 mix, will experiment with 33/67 coolant to water and see if that helps. I ordered both the 5 and the 7 blade fans, will experiment to see which is the best for my app.

    Quote Originally Posted by rand49er View Post
    With all the unconventional mods you've done, I'd say it's hard to know what's going on. What ambient conditions?
    Ambient temps are below 70F, thats why i am very concerned. Something is wrong and it has to be with the cooling system...

    650$ for the evans water pump, DAMN!!!

  13. #12
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    Re: Fan blade upgrade

    Quote Originally Posted by Naf View Post
    I did take care of the fan speeds for my new thermostat...

    I have the ron davis rad, and regular pulley.

    The over temp happens at low speeds with or without the AC on.

    Its fine at 185F as long as i am above 60mph, any speed lower and my temp climbs to 230F

    I have the new LS3 waterpump

    Evans waterpump is way too expensive, and the sellers wont deal with me for i am overseas...
    Naf - There was a thread recently over on ls1tech about coolant temps. That site loads horribly slowly here at work, so I can't go there to find the link. It was a very interesting thread, because there are some folks whose coolant temps behave like yours, and some folks whose coolant temps stayed low even in stop and go traffic. There was no clear trend that I could see as far as modified vs stock.

    With my first engine, I don't remember my coolant temps ever going high. Even at track events, they'd get up to the 210-220 or so, and would come down immediately once I got off track - and that was with all stock cooling components. But with LS6 #2, my experience is basically like yours - even with a big radiator (Alradco in my case) and a cooler t-stat my temps will climb up into the upper 220s or low 230s. In my case, the breakpoint seems to be around 45mph. I don't understand it, but that thread on ls1tech showed that I (we) are not alone.

    As for the Evans pump, are you sure it will even fit? When I was doing some searching for a pump recently, all the water pumps I could find were of the taller variety. Even Evans "short" pump will almost certainly not clear your fans with the thicker Ron Davis radiator. I have some pics and measurements at home, I'll try to remember to upload them later.
    '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...

  14. #13
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    Re: Fan blade upgrade

    This is a long shot but if you want to be absolutely sure your are not getting steam pockets in the system you could open the vents on the rear of the heads. Those vents used to be connected with tubing on LS1s, but are simply plugged on the LS6 based on the theory that the front vents sit higher than the rear and should be sufficient. Kurt Urban makes a kit for this, but it could be implemented with separately purchased components. http://www.kurturbanperformance.com/...or-system.html

  15. #14
    Andringa is offline Cadillac Owners Enthusiast
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    Re: Fan blade upgrade

    Not trying to be a smart ass, but sometimes we forget to check the simple things.

    Are the fans working? Any possibility that the tune is accidentally turning them off?

    If the cooling system works fine at speed it seems to me that the issue is with the amount of air moving through the radiator, not an internal issue. Hope you get it figured out.

  16. #15
    HAMSTAR is offline Cadillac Owners Enthusiast
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    Re: Fan blade upgrade

    Quote Originally Posted by Andringa View Post
    Not trying to be a smart ass, but sometimes we forget to check the simple things.

    Are the fans working? Any possibility that the tune is accidentally turning them off?

    If the cooling system works fine at speed it seems to me that the issue is with the amount of air moving through the radiator, not an internal issue. Hope you get it figured out.
    I'm with this guy.

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