E fan conversion

[M3kanic]

I put in a higher amp alternator and the overdrive pulley so at idle it doesn't strain the engine.

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[andrewg29]

o jebus man, your going to burn your engine up like that!

Use two of these. and a seperate relay for each one.

Wire one via relay to fan 1.
Secons same as first to fan two.

Adjust fan one to come on at 200
Second to come on at 210


PLEASE DO THIS ASAP. before you smoke your engine!

OR Get a OEM fan harness and do it OEM Style..

Eventually i would love to do it the oem way i just couldn't justify spending nearly $300 on some fans so for now i think I'll just order those fan controllers cause i dont really wanna catch my car on fire. I how do you adjust the fans im assuming it comes with instructions?

 

[ezdaar]

This is when you call me and I explain it all in detail to you. instead of this text crap via a slow forum.

 

[M3kanic]

I spent 160 on my oem fans. Then if you go a cheaper tuning route it will be like 250. That is a whole lot cheaper than replacing an engine.

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[ezdaar]

http://www.performancetrucks.net/forums/gm-parts-classifieds-23/nnbs-efans-538027/page2/

Oem fans 130$ shipped

 

[Clean07Burb]

the second being for AC is technicaly correct. but its annoying as hell and tax's the electrical system hard as ****, cycling a big ass high current fan on and off with the AC compressor..


I removed that shit when I installed my flex lites on my 04 with in a week.
Ran fan one from PCM and fan 2 via external temp probe linked above..

But for a stand alone system. I will Always use the method above and never recommend anything but that or OEM.

there is absolutely no need for the second fan to be wired into the AC compressor.


Get one of these harness., if you want a aftermarkey plug and play solution. You WILL need a tuner to turn the fans pins on tho. OR use that bitchen harness and those temp probes listed above to trigger the fans.

My second fan runs pretty much constantly when the A/C is on, especially on very hot days. How do you figure this taxes the electrical system? Not saying you're wrong, I just don't see it the same as you. Depending on your explaination, I may very well just end up agreeing with you. The truck was engineered to operate this way, so I'm sure it was designed with electrical components heavy enough to absorb the impact of the draw. Hell, I know the alternator is PLENTY heavy enough to keep the battery up, even with this heavy draw on it. My truck came equipped with a 160 amp alternator from the factory, which is actually heavier than some of the big truck alternators I rebuild at work. Just curious as to why you think the way you think regarding this...

 

[ezdaar]

There are many different fan setups.

OEM, works great with the AC. it has soft on and operates the fans in tandem from slow to fast as needed by the vehicle.

Flexlite Relay harness, runs the primary fan seperately from the secondary fan.
As such the secondary fan clicks on instantly full speed regardless of what the primary is doing when the AC comp engages.
Given the instant on AMP draw, the electrical system takes a Huge hit.
My volt gauge on dash would drop drastically, Like I had some huge bass system. It would easily drop from over 14 to below 12 volts and do this every 45sec-1.5 mins depending on outside temps as the comp clicked on and off. imagine a AC system thats faulty for what ever reason and the Comp kicks on and off every 2 seconds...
Now do this to a alternator and batter every day, while sitting in drive through's, traffic, etc and you can see how it will kill a electrical system rapidly.

The Nelson 2 wire, 3 relay harness did the same thing, as the second wire was hooked directly to the AC comp trigger. This is the setup That I used the external temp probe. It worked flawlessly as Flex lite fans wired up with correct gauge wire and directly to the battery move MASSIVE amounts of air.
This allowed me to run my two fans stand alone from each other.
With no changes in my AC temps inside the cab.
as well as not over taxing the electrical system, as the secondary fan, rarely ever turned on.

Now we have Three wire, three relay harnesses out, how they control the fans? I don't know, as I have not used one yet.

My Old flexlites, which Big buttons now own, are monsters! they hit the battery so hard, I always wanted to put a massive 10 fared cap on them to buffer the battery'*****.

I used them as garage fans for awhile No shit man, they move that much air.
While doing a test and break in.

 

[Clean07Burb]

There are many different fan setups.

OEM, works great with the AC. it has soft on and operates the fans in tandem from slow to fast as needed by the vehicle.

Flexlite Relay harness, runs the primary fan seperately from the secondary fan.
As such the secondary fan clicks on instantly full speed regardless of what the primary is doing when the AC comp engages.
Given the instant on AMP draw, the electrical system takes a Huge hit.
My volt gauge on dash would drop drastically, Like I had some huge bass system. It would easily drop from over 14 to below 12 volts and do this every 45sec-1.5 mins depending on outside temps as the comp clicked on and off. imagine a AC system thats faulty for what ever reason and the Comp kicks on and off every 2 seconds...
Now do this to a alternator and batter every day, while sitting in drive through's, traffic, etc and you can see how it will kill a electrical system rapidly.

The Nelson 2 wire, 3 relay harness did the same thing, as the second wire was hooked directly to the AC comp trigger. This is the setup That I used the external temp probe. It worked flawlessly as Flex lite fans wired up with correct gauge wire and directly to the battery move MASSIVE amounts of air.
This allowed me to run my two fans stand alone from each other.
With no changes in my AC temps inside the cab.
as well as not over taxing the electrical system, as the secondary fan, rarely ever turned on.

Now we have Three wire, three relay harnesses out, how they control the fans? I don't know, as I have not used one yet.

My Old flexlites, which Big buttons now own, are monsters! they hit the battery so hard, I always wanted to put a massive 10 fared cap on them to buffer the battery'*****.

I used them as garage fans for awhile No shit man, they move that much air.
While doing a test and break in.

I understand the aftermarket fans taxing the electrical system depending on how they're wired in, but I originally thought your comment was directed at the factory fan set-up, NOT add on e-fans. I agree with your assessment of aftermarket fans taking a huge toll on the system when not properly installed to avoid this. And I had a SPAL electriuc fan on my Supra that drew so many CFM's it was insane! I had it wired to a switch inside the cabin so I had manual control of it, and whenever I kicked it on people would look at the car because it sounded effin' badass! Sounded like a damn high pitched helicopter under the hood.

 

[andrewg29]

I understand the aftermarket fans taxing the electrical system depending on how they're wired in, but I originally thought your comment was directed at the factory fan set-up, NOT add on e-fans. I agree with your assessment of aftermarket fans taking a huge toll on the system when not properly installed to avoid this. And I had a SPAL electriuc fan on my Supra that drew so many CFM's it was insane! I had it wired to a switch inside the cabin so I had manual control of it, and whenever I kicked it on people would look at the car because it sounded effin' badass! Sounded like a damn high pitched helicopter under the hood.

Lol ive got two 2500 cfm fans under the hood they're procomp and they are bad ass it almost sounds like a baby jet.

 

[Clean07Burb]

Lol ive got two 2500 cfm fans under the hood they're procomp and they are bad ass it almost sounds like a baby jet.

Exactly!