Page 2 of 3 FirstFirst 123 LastLast
Results 21 to 40 of 50

Thread: LS2 Fan Logic or lack thereof?

  1. #21
    Advanced Tuner Braciole's Avatar
    Join Date
    May 2008
    Location
    New Jersey
    Posts
    227
    Would you recomend leaving the fans on all the time?
    when the fans are on all the time dont they run at a slower speed?
    Mike
    2007 C6 coupe LS3 416 6 speed mn Z51 3LT
    Vararam Snake charmer 160 Stat
    Kooks 1 7/8 headers with jet hot
    Fast 102 ported intake 102 TB RPM Level 5 T56
    MGW short throw ZIP 4.10 Severe Duty rear
    RPS TWIN DISC CARBON CLUTCH CCWs ele wp
    RPM LEVEL 5 TRANS W/HARDENED OUTSHAFT
    http://www.youtube.com/watch?v=PtOPy_lp2QY

    10.66 1.47 60ft 133+mph

  2. #22
    Tuner in Training PapitoGTO's Avatar
    Join Date
    Mar 2008
    Location
    Marietta, GA
    Posts
    21
    Quote Originally Posted by ct06gto
    I installed my 160* stat today. Here is the information that i got. First, i upgraded to a 2 bar os so i could get the fan settings down to 163*. I then copied over my map settings under engine diagnostic's, airflow, map sensor from my stock bin so i didnt have to purchase a 2 bar map(thanks soundengineer). Using this table, i got the fans to cycle on and off between 172* and 190*.

    This method worked perfectly on my 06 GTO. Thanks.
    2006 Pontiac GTO
    2003 Infiniti M45--- Payed off
    2009 BMW 135i- Awaiting Transport

    Mods: TigerShark Cam Package, Volant intake, GFI Ported TB, GMM Race, MSD Plug Wires, Stainless Work headers w/cats, Magnaflow X-pipe, Kooks "Afterburner" Axlebacks, Pedders Strut Bar, Pedders Street I, Drift R 19", HpTuners
    RWHP: 419.72 RWTQ: 402.51

  3. #23
    Advanced Tuner
    Join Date
    May 2007
    Posts
    307
    Quote Originally Posted by ct06gto
    I installed my 160* stat today. Here is the information that i got. First, i upgraded to a 2 bar os so i could get the fan settings down to 163*. I then copied over my map settings under engine diagnostic's, airflow, map sensor from my stock bin so i didnt have to purchase a 2 bar map(thanks soundengineer). Using this table, i got the fans to cycle on and off between 172* and 190*.

    explain this one more time?

  4. #24
    Advanced Tuner
    Join Date
    Jul 2006
    Posts
    218
    Quote Originally Posted by Texsrt4
    explain this one more time?
    The stock fan table starts at 192*. If you want to gain access to lower table settings you must upgrade to a 2 bar operating system. This will get you down to 163*. When you upgrade to a 2 bar os you need to have a 2 bar map sensor or your car will barely run or you can simply go to the map settings under diagnostics>airflow and turn back the 3 map settings back to what your original 1 bar settings were.
    I hope i didnt confuse you more.

  5. #25
    Advanced Tuner
    Join Date
    May 2007
    Posts
    307
    ok got it. i thought you said that you upgraded then reverted and didnt have to pay for the upgrade. i was a little confused. but this makes sense now. thanks for clarifying

  6. #26
    interesting info on the c6 fan setup.
    thanks

  7. #27
    Tuner in Training
    Join Date
    May 2007
    Location
    az
    Posts
    10
    i have stock tune 06 c6, while logging the other day, i noticed the fan was on (like 10-15%) even with the ect was around 180*, iat around 100*, ambient temp around 90*, & with the a/c off. any idea why the fan was on? thanks
    Last edited by cbrf4i1; 08-09-2008 at 08:35 AM.

  8. #28
    Senior Tuner
    Join Date
    Jun 2007
    Posts
    1,100
    Quote Originally Posted by Chris@HPTuners
    you can't make then come on at anything below 192F unless you use our 2bar OS.

    Well, you can... just that they will be on all the time.

    Chris...
    Whats up with this Chris? ...EFI Live lets you do it.

  9. #29
    Advanced Tuner
    Join Date
    Nov 2005
    Location
    Someplace high in the Himalayas
    Posts
    763
    Would it be possible to use 25,49,51,91...... for a 160* thermo? You need the 25 for off, 49 for transition from 0 to low speed, 51 for slow to medium, and 91 for max. Is that correct?

    If I use a manual fan switch and put it on high, I can maintain 175* on a 90* day with a 160* thermo. If you used 25,91... would it ever shut off?
    www.outlawpontiacdragseries.com
    Come race with us in MA, PA, and VA!

    2005 GTO A4 - Spintech X-pipe with Powerstick mufflers, IAT relocate, Volant, !scoops, !cowlgasket, !skid plate, LM-1, HPT2.0/MPVI Pro USB, 275x40x17 Nitto DR, rolled fenders, Pedders 2985 springs, Britax baby seat with 5 point harness.
    Stock:13.36@104
    Mods in sig:13.02@106.5

  10. #30
    Senior Tuner Russ K's Avatar
    Join Date
    Dec 2005
    Location
    Regina, Sask.
    Posts
    4,137
    Should work with those settings, you may have to use 24 instead of 25 for the low speed fans to turn off.

    Keep in mind that a 160* stat will run at 172*F-176*F at highway speeds.

    Russ Kemp

  11. #31
    Advanced Tuner
    Join Date
    Nov 2005
    Location
    Someplace high in the Himalayas
    Posts
    763
    So do you think 25,49,51,91...... is the best option or are you saying 24,91? With the fans not being variable speed, I don't quite understand why it is just not off, both slow, both fast. Does it actually ramp up to slow speed from 0-25%?
    www.outlawpontiacdragseries.com
    Come race with us in MA, PA, and VA!

    2005 GTO A4 - Spintech X-pipe with Powerstick mufflers, IAT relocate, Volant, !scoops, !cowlgasket, !skid plate, LM-1, HPT2.0/MPVI Pro USB, 275x40x17 Nitto DR, rolled fenders, Pedders 2985 springs, Britax baby seat with 5 point harness.
    Stock:13.36@104
    Mods in sig:13.02@106.5

  12. #32
    Advanced Tuner
    Join Date
    Jan 2008
    Posts
    237
    Bill can this method work with LS7 ?

  13. #33
    Quote Originally Posted by C5 2000 View Post
    Bill can this method work with LS7 ?
    I'd like to know the same thing. If somebody has an LS7 stock OS table they could share that works great (which I think was in this thread already) I'd really appreciate it!

  14. #34
    Senior Tuner 5_Liter_Eater's Avatar
    Join Date
    Nov 2005
    Location
    Houston, TX
    Posts
    3,970
    The settings in the screenshots above are for the GTO's which are a little different. They have two fans which are either both off, both on or only one on. The crossover from 1-2 fans on is 51%.

    The vettes have one fan that gets pulsewidth modulated. So just set it to whatever duty cycle you want at different ECTs. Note that if you don't have the extended fan table and put anything in the 196 column the fan will always be on at least what you dictate there. So best case would be 196=0%, 201=90%. IMO.
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  15. #35
    Tuner
    Join Date
    Dec 2005
    Location
    Verona, WI
    Posts
    144
    If you have discrete fans you could try using the excel spread sheets I posted in this thread:

    http://www.hptuners.com/forum/showthread.php?t=30073

    If you have PWM fans then they work differently so I think you would need to follow 5 Liter Eater's advice on the PWM settings.

  16. #36
    Quote Originally Posted by 5_Liter_Eater View Post
    The settings in the screenshots above are for the GTO's which are a little different. They have two fans which are either both off, both on or only one on. The crossover from 1-2 fans on is 51%.

    The vettes have one fan that gets pulsewidth modulated. So just set it to whatever duty cycle you want at different ECTs. Note that if you don't have the extended fan table and put anything in the 196 column the fan will always be on at least what you dictate there. So best case would be 196=0%, 201=90%. IMO.
    Bill,

    So my stock OS table for my single PWM fan will start at 196 and you think there it should be 0% then jump to 90% at 201 ? If I put something in 196 above 50% does that mean the fan will always be on?

    Thanks for your guidance!

  17. #37
    Senior Tuner 5_Liter_Eater's Avatar
    Join Date
    Nov 2005
    Location
    Houston, TX
    Posts
    3,970
    It's personal preference what to put in the 201. Its been a while but I believe if you put anything in the 196 then it will command that until you pass into the 201 cell. So if you command 30% at 196 degrees then when you start the car in the morning the fan will be at 30% until it gets past 196. At least thats how I remember it working. I've been on the 2 bar OS for some time now so my fan tables are extended. Having said that I command 0% up until 180 degrees where I command 90% from there on in. KISS IMO
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  18. #38
    Advanced Tuner
    Join Date
    Nov 2005
    Location
    Someplace high in the Himalayas
    Posts
    763
    Quote Originally Posted by PurplePiss View Post
    So do you think 25,49,51,91...... is the best option or are you saying 24,91? With the fans not being variable speed, I don't quite understand why it is just not off, both slow, both fast. Does it actually ramp up to slow speed from 0-25%?
    Would still like to know the answer to the above. Do you need 24 in the first cell to make sure the fans turn off or is 25 ok? Can you go 24,91,91...
    www.outlawpontiacdragseries.com
    Come race with us in MA, PA, and VA!

    2005 GTO A4 - Spintech X-pipe with Powerstick mufflers, IAT relocate, Volant, !scoops, !cowlgasket, !skid plate, LM-1, HPT2.0/MPVI Pro USB, 275x40x17 Nitto DR, rolled fenders, Pedders 2985 springs, Britax baby seat with 5 point harness.
    Stock:13.36@104
    Mods in sig:13.02@106.5

  19. #39
    Senior Tuner Russ K's Avatar
    Join Date
    Dec 2005
    Location
    Regina, Sask.
    Posts
    4,137
    I would try 24 24 24 51 91 91...... The C6 Corvette has a single variable speed fan, your car has 2 fans that run in series circuit for low speed and in parallel circuit for high speed. So they are both either off, low speed or high speed.

    What is your ECT at free way speeds? My car with a 160* stat runs around 172* to 176* at that speed.

    Russ Kemp

  20. #40
    I have a car with an ls-7 run by an E38 ecm. The fans are relay controlled. When they turn on the relays buzz. If i change fan type to discrete the fan runs all the time. How do I get the fan to turn on and off at specified temps without the relays buzzing?