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Thread: Wiring an Electric Cooling Fan - Holley EFI

  1. #91
    Join Date
    Jun 2013
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    Calgary, Alberta
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    I'm getting smarter with this. Went into the Global File, assigned the outputs to the correct pins, and voila! All good. Thanks again Danny!

    I guess I have to understand that the ECU is no longer a Terminator ECU, as I loaded everything onto it from whatever ECU the Global File was written on. I should check the knock sensor pin locations, to see if they match the Terminator locations. Everything else seems fine.

  2. #92
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    Dec 2009
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    Connecticut
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    You're welcome. Glad you resolved the problem.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #93

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    Quote Originally Posted by Danny Cabral View Post
    No, it must be an actual PWM electronic fan controller (LINK), not just a simple solid state relay.
    A PWM electronic controller is required, to convert the PWM signal (from the ECU), into variable voltage to the electrical component.
    http://forums.holley.com/showthread....0799#post70799 (Additional Information)
    I'm not trying to stir the pot, but only keep accurate information. This may not be correct. I was on the Bullet looking at the PWM fan control thread, and several guys are using the Crydom relays to do PWM control on their fan. I have three of the 60 amp relays, that I had purchased so just for fun. I temporarily wired one of them in and tried it. They work fine. I'm sticking with the OEM controller, since I already have them mounted, but it's a myth that solid state relays won't work. (At least the Crydom does.) I talked to one guy on the Bullet who has been using his relay for 4 months without problems. http://www.yellowbullet.com/forum/sh...1350410&page=6. Tom

  4. #94
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    Thanks for the information. I actually like the idea of a simple solid state relay better, but my Spal dual 12" electric fans (LINK) are too expensive to risk it. Also, they're quiet enough. I think the OEM & aftermarket manufacturers use a PWM electronic fan controller for good reason, and they keep costs down wherever they can.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  5. #95

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    I agree Danny, I used a controller for each fan and they aren't going anywhere. Tom

  6. #96
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    Connecticut
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    I'm glad you questioned the conventional wisdom, because it has me thinking now too. I wonder how all this relates to a brushless fan motor. If I get some time next week, I might research this.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  7. #97

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    Do you guys think it's OK to PWM a OEM fan that didn't come that way from the factory? Thinking about pulse width modulating my '96 Mustang fan.
    96 MUSTANG/6.0 LQ9/S475 T4/HOLLEY HP EFI/TH400/3.27

  8. #98

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    So no relays needed when running PWM− wire to the Corvette controller since it isn't actual voltage? Then just add a circuit breaker to negative battery wire on the controller?

  9. #99
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    Dec 2009
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    Connecticut
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    http://forums.holley.com/showthread....0372#post60372 (PWM Electric Cooling Fan Instructions)
    http://forums.holley.com/showthread....0371#post60371 (PWM Electric Cooling Fan Instructions)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  10. Default

    Quote Originally Posted by Danny Cabral View Post
    It must be an actual PWM electronic fan controller (LINK), not just a simple solid state relay.
    A PWM electronic controller is required, to convert the PWM signal (from the ECU), into variable voltage to the electrical component.
    http://forums.holley.com/showthread....0372#post60372 (PWM Electric Cooling Fan Instructions)
    http://forums.holley.com/showthread....0371#post60371 (PWM Electric Cooling Fan Instructions)
    I've been using a Crydom D06D60 controlling my Flex-A-Lite Black Magic Extreme fan via PWM, and it works perfectly. I bought this relay used on eBay for $25 and have it mounted on a heat sink that I bought on eBay for $8. This is just an SSR, it does not convert the signal to variable voltage. I have had this setup running for over a year, and I'm wondering if it will eventually kill the fan motor, or if the PWM converter is really not necessary. Mike
    1967 Camaro. 5.3L L33 swap, Holley Dominator EFI. 10.65 @ 128 so far.
    Rick's Tank with dual Walbro 450s, Holley 120 lb/hr injectors.
    LS1 intake, stock DBW TB, LJMS custom cam/BTR springs/Tick pushrods.
    TH400, FTI Converter, Fab9, 3.25 gears/Wave-Loc diff, 275/60/15 M/T ET Streets. 125 HP dry nitrous.
    Waiting to install Holley Turbo Manifold Kit: Forced Inductions Billet S485/Vibrant 18x12x6" A2A. Looking to go 8s this year.

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