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    Results 21 to 37 of 37
    1. #21
      Join Date
      Apr 2005
      Location
      Erie, PA
      Posts
      349
      Country Flag: United States
      Well,

      After talkeing to SPAL online trying to figure out how to wire in a high-speed bypass, it will need 3 external relays to get this done.
      So I chickened out and ordered one of these new DIF pwm Controllers. It has everything I want and handles 50 amps continous load.



      Anyone wants to buy a never run SPAL V3 unit?

      http://www.popularhotrodding.com/hot...nte_carlo.html
      Andreas
      President First Gen Monte Carlo Club
      www.fgmcc.com


    2. #22
      Join Date
      May 2006
      Location
      Ontario, Canada
      Posts
      45
      Well at least they responded to you... I still haven't heard back. I'll likely be selling my SPAL V3 as well.

    3. #23
      Join Date
      Apr 2006
      Location
      Huntington Beach, CA
      Posts
      2,415
      Country Flag: United States
      Who makes or what is the DIF pwm controller?
      Please Subscribe to the AutoXandTrack YouTube Channel

      Autocross and track blog about running autocross and track events with pro touring cars

    4. #24
      Join Date
      May 2006
      Location
      Ontario, Canada
      Posts
      45
      I'm going to take a stab in the dark and guess he's talking about DC Controls - I had one of those years ago and it died after getting caught in a light rain. Their customer service was terrible as well - I waited over 3mo (ignored emails and empty promises) for a replacement before finally asking for a refund instead.

      I usually try to "keep it simple" and it seems to be the way to go with fan control. Relays generally never die, and controllers seem to be extremely flaky from my experiences. I've had three die on me altogether - the one DCC unit, and two early model SPAL units (one stopped working, one stuck on 100% all the time).

    5. #25
      Join Date
      Mar 2005
      Location
      Walton, NY
      Posts
      736
      I spent $200 on SPAL crap and have never had it work right, it's definitely the older version. My $10 HD relay works like a champ though.

    6. #26
      Join Date
      Apr 2005
      Location
      Erie, PA
      Posts
      349
      Country Flag: United States

    7. #27
      Join Date
      Jul 2008
      Location
      Dallas, TX
      Posts
      260
      Im running a Mark VIII Fan with a 70amp relay and a PAC-2700. Works perfectly. Probably a little over kill actually. I got it thinking I could wire the fan to two speeds (which I later found out you can't) If I ever replace the fan though, I'll do dual fans and the controller can change the turn on times to each fan indiviually.

      The controller:
      http://www.dakotadigital.com/index.c...641/prd641.htm

      The relay:
      http://order.waytekwire.com/productd...POWER%20RELAY/
      '69 Chevelle - LQ4/T56
      '71 GMC SWB Fleetside - LM7/AR5

    8. #28
      Join Date
      May 2006
      Location
      Ontario, Canada
      Posts
      45
      Some Mark VIII's are two speed - I have bench tested mine and it is indeed a two speed fan, so I will be wiring it that way. Here's some options for both single and two speed wiring:

      http://www.motortopia.com/files/cars...Thumbnail1.jpg



      http://www.motortopia.com/files/cars...Thumbnail1.jpg



      The following is only required because of the draw of a Mark VIII fan on high, and the fact it's nearly impossible to find a 5-pin 70A+ relay:
      http://www.motortopia.com/files/cars...Thumbnail1.jpg


      If anybody wants a better quality pdf/jpg, I could send a copy.

    9. #29
      Join Date
      Jun 2008
      Location
      Cumming, GA
      Posts
      138
      Country Flag: United States
      Check out Delta controller. Best around with variable speed...

      http://www.dccontrol.com/0820.htm

    10. #30
      Join Date
      May 2006
      Location
      Ontario, Canada
      Posts
      45
      Quote Originally Posted by LSX1STGEN View Post
      Check out Delta controller. Best around with variable speed...

      http://www.dccontrol.com/0820.htm
      Quote Originally Posted by 85_SS View Post
      ...DC Controls - I had one of those years ago and it died after getting caught in a light rain. Their customer service was terrible as well - I waited over 3mo (ignored emails and empty promises) for a replacement before finally asking for a refund instead.
      Just as unreliable as SPAL from my experience, only with worse customer service.

    11. #31
      Join Date
      Jul 2005
      Location
      Marshall , MO
      Posts
      695
      Anyone ever looked at a speed controller for a robot. http://www.myskunkworks.net/servlet/...ers/Categories or http://www.robotpower.com/products/osmc_info.html they are not plug and play but should be able to handle any fan you can come up with.
      Brad Shepard
      69 Malibu
      Marshall, MO

    12. #32
      Join Date
      Apr 2005
      Location
      Erie, PA
      Posts
      349
      Country Flag: United States
      Quote Originally Posted by LSX1STGEN View Post
      Check out Delta controller. Best around with variable speed...

      http://www.dccontrol.com/0820.htm
      I have checked them out before. I am just not a big fan of in-radiator temperature sensors.... Hence I will give the DIF controller a try...

      http://www.popularhotrodding.com/hot...nte_carlo.html
      Andreas
      President First Gen Monte Carlo Club
      www.fgmcc.com

    13. #33
      Join Date
      May 2006
      Location
      Ontario, Canada
      Posts
      45
      After finding out that the Mark VIII fan was too much for the SPAL V3 to handle, I decided to scrap the whole controller idea and make up my own harness/diagrams for a hopefully trouble free system. I designed it so that it operates much like an electric fan in newer cars. It also has a high speed manual override switch, as well as feedback through a single RGB LED for the various states (high/low/AC).

      Here's the final schematic and wiring diagram I designed:





      Mark VIII fan installed:





      Relays/custom harness wired up and ready to go:


      (figured I may as well make use of the Maxi-fuse holder from a painless 70A wiring kit I decided not to use)


      Relay rack fits nice and snug next to battery (one more relay was added for proper LED control due to fan motor feedback on opposite speed):



      And finally here's the LED in the different stages (mounted at manual override switch/temp gauge):

      Off:


      Low Speed:


      High Speed:


      A/C:


      It will be nice to finally have a trouble free, fully operational fan setup - beats the unreliability of these worthless controllers out there!

    14. #34
      Join Date
      Apr 2008
      Location
      Anaheim, Ca
      Posts
      99
      This thread is awesome! Would be great for a how to section, lots of good info.

      Thank you for saving me from buying a spal controller for a mkVIII fan.
      Kenneth N.

      1969 Mercury Cougar XR-7 Boss 429 clone under construction

    15. #35
      Join Date
      May 2006
      Location
      Ontario, Canada
      Posts
      45
      Not a problem, I had to go through it anyways in order to decide what I wanted to do, and figured I may as well share as I know a lot of people like to use this fan.

    16. #36
      Join Date
      May 2006
      Location
      Ontario, Canada
      Posts
      45
      Due to the unexpected operation of the Hayden controller with the engine off, I have made one final change to the diagram so that the fan will only run with the car on.
      What was happening is the fans would run for a minute or two when the car turned off (as expected and designed for). I expected this might happen 2-3 times as the coolant would increase in temp again a few times once the fan stopped. This did happen, but the odd part was after a while the controller would call for the fan to be on for a split second every minute or so and this went on basically until the car naturally cooled down. This wasn't good for the battery and left me with just enough juice to crank the car over a couple times. I didn't like the idea of possibly getting stranded with a dead battery, so I made a minor change that only allows the fan to run with the ignition on:

      http://www.motortopia.com/files/cars...Thumbnail1.jpg


      http://www.motortopia.com/files/cars...Thumbnail1.jpg


      On a side note, regarding how to tell the difference between the 1 and 2 speed Mark VIII fans, I put this quick image together for reference:

    17. #37
      Join Date
      Nov 2004
      Location
      Dallas Texas
      Posts
      496
      Country Flag: United States

      fan wiring 101

      this needs to be stickied! good job guys!
      Rich
      69 Trans Am "TireBird"
      M6 / LS6 minitubbed DSE Sub
      C5 frt LS1 rear disc brakes
      https://www.pro-touring.com/forum/showthread.php?t=14992
      69 R/S Z28 302
      15 Camaro ZL1
      90 Formula next project

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