Best radiator/fan combo for LS3 swap - Team Camaro Tech
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post #1 of 52 (permalink) Old Aug 1st, 19, 08:23 PM Thread Starter
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Best radiator/fan combo for LS3 swap

Gang -

Looking for some recommendations on the right radiator for my LS3 swap in the Grocery Getter. Any feedback would be greatly appreciated. Specifics would be great.

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post #2 of 52 (permalink) Old Aug 2nd, 19, 03:53 AM
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Re: Best radiator/fan combo for LS3 swap

What sort of horsepower?

I have used Entropy, Dewitt, and C&R Racing with good results.

Don
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Last edited by dhutton; Aug 2nd, 19 at 04:47 AM.
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post #3 of 52 (permalink) Old Aug 2nd, 19, 04:11 AM
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Re: Best radiator/fan combo for LS3 swap

Superior has a great LS radiator, fans and everything! I used an Entropy in my current setup and it works well.

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post #4 of 52 (permalink) Old Aug 2nd, 19, 08:48 AM Thread Starter
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Re: Best radiator/fan combo for LS3 swap

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Originally Posted by dhutton View Post
What sort of horsepower?

I have used Entropy, Dewitt, and C&R Racing with good results.

Don
Good question - it's 525 HP.

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post #5 of 52 (permalink) Old Aug 2nd, 19, 09:12 AM
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Re: Best radiator/fan combo for LS3 swap

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Good question - it's 525 HP.
Try to find a dual pass with 1Ē or larger tubes and dual Spal fans. No worries then imho.

Don

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post #6 of 52 (permalink) Old Aug 2nd, 19, 02:04 PM Thread Starter
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Re: Best radiator/fan combo for LS3 swap

Thanks Don, good advice.

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post #7 of 52 (permalink) Old Aug 9th, 19, 06:23 PM Thread Starter
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Re: Best radiator/fan combo for LS3 swap

Has anybody tried one of the Cold Case LS swap radiators? I know they are a sponsor here so I thought I would take a look. Quite a bit less than some others but only one 16" fan instead of the dual Spals. They do have the dual 1.25" tubes though which does seem to be the way to go.

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post #8 of 52 (permalink) Old Aug 9th, 19, 06:52 PM
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Re: Best radiator/fan combo for LS3 swap

Quite a bit less because no Spal fans and not dual pass? What is the cfm rating of the fan?

What sort of fan controller are you going to use? Single fan means you canít use a series/parallel dual speed fan controller. PWM would be ok. Simple on off will be noisy imho, especially if you have AC.

There is no free lunch with most of this stuff imho....

Don

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post #9 of 52 (permalink) Old Aug 9th, 19, 08:10 PM Thread Starter
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Re: Best radiator/fan combo for LS3 swap

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Originally Posted by dhutton View Post
Quite a bit less because no Spal fans and not dual pass? What is the cfm rating of the fan?

What sort of fan controller are you going to use? Single fan means you canít use a series/parallel dual speed fan controller. PWM would be ok. Simple on off will be noisy imho, especially if you have AC.

There is no free lunch with most of this stuff imho....

Don
You obviously know a lot more about this than I do. As near as I can tell the fan is rated at 2500 CFM. I honestly don't know what kind of fan controller I am using or what PWM means (sorry to sound so ignorant, learning as I go). Purchasing an LS3 from Turnkey and I am running AC so if there is some significant advantage to dual fans I am all ears.

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post #10 of 52 (permalink) Old Aug 10th, 19, 03:27 AM
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Re: Best radiator/fan combo for LS3 swap

PWM is a method to provide continuously variable fan speed based on coolant temperature. Pulse Width Modulation.

These fans are noisy. If you donít have some kind of speed control your fan will be running max speed every time your AC compressor kicks on.

Entropy has a two speed controller that needs two fans.

DC Controls has a PWM controller. It can work with one or two fans.

I have used both with good results.

2500 cfm sounds a little light for 525 hp with AC imho.

I can tell you that you will never regret an oversized cooling system but never enjoy one that is undersized and you are constantly watching the temperature gauge worrying it is going to overheat.

Don
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post #11 of 52 (permalink) Old Aug 10th, 19, 12:01 PM
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Re: Best radiator/fan combo for LS3 swap

I have the Entropy LS rad with their dual fans and the LS 2 speed controller. Love it.
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post #12 of 52 (permalink) Old Aug 10th, 19, 03:18 PM Thread Starter
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Re: Best radiator/fan combo for LS3 swap

Entropy it is then. I went ahead and purchased the two fan relay controllers as well. Really appreciate this reminder:

"I can tell you that you will never regret an oversized cooling system but never enjoy one that is undersized and you are constantly watching the temperature gauge worrying it is going to overheat".

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post #13 of 52 (permalink) Old Aug 10th, 19, 03:45 PM
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Re: Best radiator/fan combo for LS3 swap

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Originally Posted by Shannon4570 View Post
Entropy it is then. I went ahead and purchased the two fan relay controllers as well. Really appreciate this reminder:

"I can tell you that you will never regret an oversized cooling system but never enjoy one that is undersized and you are constantly watching the temperature gauge worrying it is going to overheat".
Make sure you order the LSX dual fan controller so you get the dual speeds. For some reason I canít see the fan controllers on their website.

Don
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post #14 of 52 (permalink) Old Aug 10th, 19, 04:19 PM Thread Starter
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Re: Best radiator/fan combo for LS3 swap

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Make sure you order the LSX dual fan controller so you get the dual speeds. For some reason I canít see the fan controllers on their website.

Don
Seems like they just have the dual fan harness but not the actual controller which I am assuming is some kind of device, correct?

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post #15 of 52 (permalink) Old Aug 10th, 19, 05:03 PM
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Re: Best radiator/fan combo for LS3 swap

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Seems like they just have the dual fan harness but not the actual controller which I am assuming is some kind of device, correct?
Yes the controller comes with a harness. Maybe they stopped making them. Give them a call Monday. If you canít get one try the DC Controls PWM controller. Get the high current version.

Don

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