PWM Fan Controllers - Team Camaro Tech
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post #1 of 33 (permalink) Old Oct 9th, 17, 01:21 PM Thread Starter
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PWM Fan Controllers

Anyone use a PWM fan controller with their electric fans ?? Thoughts, Doubts, Comments are all welcome. Derale seems to have one but the reviews make me skeptical of the performance and reliability.

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post #2 of 33 (permalink) Old Oct 9th, 17, 02:03 PM
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Re: PWM Fan Controllers

I was thinking of using one of these. Same guy makes the Vaporworx PWM fuel pump controller which works well.

constant temperature controllers

Don

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post #3 of 33 (permalink) Old Oct 9th, 17, 04:48 PM Thread Starter
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Re: PWM Fan Controllers

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Originally Posted by dhutton View Post
I was thinking of using one of these. Same guy makes the Vaporworx PWM fuel pump controller which works well.

constant temperature controllers

Don
Looks good Don.

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post #4 of 33 (permalink) Old Oct 9th, 17, 05:19 PM
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Re: PWM Fan Controllers

I've used this on both LS and Non LS builds

Electronic Fan Controller 70 Amp

Fully programmable, the PAC-2750 will work with your existing water temp gauge, operating from the temperature sending unit already installed. A dedicated sending unit can be installed for applications without a water temp gauge. OBD II compatible vehicles can obtain the engine temperature from the ECM with the use of a BIM-01-2 (or previous BIM-01-1), purchased separately.

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post #5 of 33 (permalink) Old Oct 9th, 17, 06:32 PM
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Re: PWM Fan Controllers

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Originally Posted by Vega$69 View Post
I've used this on both LS and Non LS builds

Electronic Fan Controller 70 Amp

Fully programmable, the PAC-2750 will work with your existing water temp gauge, operating from the temperature sending unit already installed. A dedicated sending unit can be installed for applications without a water temp gauge. OBD II compatible vehicles can obtain the engine temperature from the ECM with the use of a BIM-01-2 (or previous BIM-01-1), purchased separately.
This is simple on/off fan control and not PWM. PWM (pulse width modulation) control turns the fan on and off at a high rate with a variable on/off duty cycle. This enables the fan to run with continuously variable speed and only as fast as needed to maintain the programmed coolant temperature. Benefits are reduced noise and increased fan reliability.

Don

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
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post #6 of 33 (permalink) Old Oct 9th, 17, 06:36 PM
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Re: PWM Fan Controllers

Interesting for sure. Similar to the PWM fuel pump set ups.
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Last edited by Vega$69; Oct 9th, 17 at 07:05 PM.
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post #7 of 33 (permalink) Old Oct 10th, 17, 10:39 PM
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Re: PWM Fan Controllers

I used the Derale PWM Controller P/N 16795 for the LS3/480 I put in my 55 BelAir as I wanted to avoid the noisy full on/off only feature that the ECM has. I'll say I was suspicious off it's reliability and left the ECM fan control as a backup. Well, this past summer we drove the car from SoCal to Maine and back, nearly 7500 miles through hot weather and lots of rain and the controller worked flawlessly.

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post #8 of 33 (permalink) Old Oct 11th, 17, 04:00 AM Thread Starter
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This is the kind of information I was looking for. I have read many negative reviews. Many guys using aluminum radiators had problems. Are you using an aluminum radiator?? Thx

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post #9 of 33 (permalink) Old Oct 11th, 17, 04:35 AM
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Re: PWM Fan Controllers

I have used old school set up, copper/brass radiator and clutch fan with stock fan shroud on SB and BB and never had issues on more than a dozen first gens. . . .JMO
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post #10 of 33 (permalink) Old Oct 11th, 17, 04:41 AM
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Re: PWM Fan Controllers

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Originally Posted by The Camaro Guy View Post
I have used old school set up, copper/brass radiator and clutch fan with stock fan shroud on SB and BB and never had issues on more than a dozen first gens. . . .JMO
He has an LS and needs electric fans.
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post #11 of 33 (permalink) Old Oct 11th, 17, 11:34 AM
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Re: PWM Fan Controllers

I have a Griffin aluminum radiator along with a single Spal electric fan.
The setup keeps everything nice even with A/C
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post #12 of 33 (permalink) Old Oct 11th, 17, 11:46 AM
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Re: PWM Fan Controllers

My 68 Camaro has healthy 383/5speed with an aluminum radiator with a 7 blade clutch fan. This setup works very nice as well, even with A/C. Never gets over 180-190. Went with the aluminum radiator a few years ago since it's getting harder to find a good old school radiator guy.
With the LS you don't have the option for a fan/clutch setup, which I prefer.
The thing with electric fans that I hate is how loud they get when full on. Having a PWM controller the fan has never come on full speed and yet the temps remain in range.
When ya cruise into the parking spot, ya want to only hear that nice sweet sound of the motor:-)

Don
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post #13 of 33 (permalink) Old Oct 11th, 17, 01:06 PM Thread Starter
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Re: PWM Fan Controllers

Quote:
Originally Posted by BrewHog55 View Post
I have a Griffin aluminum radiator along with a single Spal electric fan.
The setup keeps everything nice even with A/C
Very nice to hear Don, this sounds promising.

1969 X66 396 LeMans Blue, M20, 373 (Sold)
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post #14 of 33 (permalink) Old Oct 11th, 17, 01:07 PM Thread Starter
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Re: PWM Fan Controllers

Quote:
Originally Posted by BrewHog55 View Post
My 68 Camaro has healthy 383/5speed with an aluminum radiator with a 7 blade clutch fan. This setup works very nice as well, even with A/C. Never gets over 180-190. Went with the aluminum radiator a few years ago since it's getting harder to find a good old school radiator guy.
With the LS you don't have the option for a fan/clutch setup, which I prefer.
The thing with electric fans that I hate is how loud they get when full on. Having a PWM controller the fan has never come on full speed and yet the temps remain in range.
When ya cruise into the parking spot, ya want to only hear that nice sweet sound of the motor:-)

Don
Exactly what I want!!

1969 X66 396 LeMans Blue, M20, 373 (Sold)
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post #15 of 33 (permalink) Old Oct 11th, 17, 01:09 PM Thread Starter
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Re: PWM Fan Controllers

Quote:
Originally Posted by The Camaro Guy View Post
I have used old school set up, copper/brass radiator and clutch fan with stock fan shroud on SB and BB and never had issues on more than a dozen first gens. . . .JMO
Yes I have the old school set-up on my SS396. Works great. The LS3 set-up gets electric fans. I'm looking for a good PWM controller.

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