Question for you E-fan guys

[Mr45]

SO I'm thinking about going the E-fan route with my Tahoe, and I saw a few different options, and as far as I can tell you can either get a kit, complete with shroud/mounting surface etc.

The other option as posted by JK (IIRC) is where two fans just get stuck to the radiator. Will this setup work as efficient as a setup with a shroud?

This setup, with a shroud: (Jennabear)

Vs.

without a shroud (JK Motorsports)

It appears that a simple setup with 2 fans, like JK can be put together for minimal $$, compared to a setup complete with Shroud.

Just wondering what the differences in effectiveness are.

 

[JKmotorsports]

Set-ups with a shroud are more efficient at pulling air through the entire radiator surfaces rather than just where the fans are mounted. My set-up works great, but can be made to work better with a shroud. I had planned on making my own shroud with ABS/fiberglass, but just got lazy, lol. I like doing things from scratch rather than buying kits because for me it's easy and definitely a lot cheaper.
Either way, with or w/o a shroud, a dual e-fan setup is much better than the stock engine driven fan.

 

[Mr45]

Set-ups with a shroud are more efficient at pulling air through the entire radiator surfaces rather than just where the fans are mounted. My set-up works great, but can be made to work better with a shroud. I had planned on making my own shroud with ABS/fiberglass, but just got lazy, lol. I like doing things from scratch rather than buying kits because for me it's easy and definitely a lot cheaper.
Either way, with or w/o a shroud, a dual e-fan setup is much better than the stock engine driven fan.

Thanks for your input.

So without a shroud, you have no cooling issues? Long idling etc?

 

[JKmotorsports]

No issues whatsoever. A/C cools much quicker during startup and stays colder while idling and sitting in slow traffic and eng temps stay a bit cooler as well during idling. We've had 100+ degrees day here for the past few weeks and the a/c and eng have no problems staying cool even in midday traffic. You might also want to swap to a lower t-stat also, maybe a 180* if your eng is mostly stock. This will help keep the eng running a little cooler also. Whereabouts in Fl are you? If you're farther south, you might even want to try a 160* t-stat.

 

[Mr45]

Engine is mostly stock. I'm about an hour south of Tampa. 180* should suffice, I think.

 

[JennaBear]

I personally don't think changing out a T-stat is necessary.

 

[TheFuzz]

So Jenna and JK, what are your opinions about the kits that Ty found on e-bay? The sellers seem kinda like *********, but they have mostly positive feedback and the kits look pretty well put together. I'm not all that good with this kind of stuff yet, but I have a feeling I'll be keeping the Yukon for a long time...might as well start with a kit. Any thoughts?

 

[JennaBear]

I am not a fan of the radiator mod, I wouldn't want to have to drill into anything. I like that my fans are set up for different speeds (via the PCM) and will turn on and off as needed, thus saving more energy/power.

I am sure those fans will work just fine, I am more inclined to the plug and play applications.

 

[BOSS]

I just did this efan install on my ************* daily driver yesterday (in the 100deg. heat), not too bad ...the pain in the ass was getting to the radiator backside because of the heat exchanger for the AC.

B

 

[AtomicHoe094]

So Jenna and JK, what are your opinions about the kits that Ty found on e-bay?

which kit>?

 

[TheFuzz]

which kit>?

Here's the one Ty posted, this is the one I was referring to:

http://cgi.ebay.com/ebaymotors/CHEV...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories


There is also an autoparts store on there that is selling brand new OEM fans for the Tahoes/Yukons for $250 shipped, but that's just the fan assembly, you'd still need the harness and anything else needed to make them work. Is $250 good for the OEM fans though?

http://cgi.ebay.com/ebaymotors/05-0...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

Jenna, I'm a little confused as to how your harness works. Does it plug into the PCM to control the fans? If so, since my truck has a mechanical fan, does the PCM need to be re-programmed to utilize the harness? Does the overdrive pulley have to be used, or is it optional?

 

[JennaBear]

Yes the harness plugs the fans in to the PCM just like the OEM ones on the 05+ vehicles. The PCM will need to have the PINs turned on for the fans to work.

We suggest the overdrive pulley to folks who are putting e-fans in a vehicle that did not come with them stock. This is because alternator is not the larger alternator that is now in the vehicles that come with fans stock. The pulley helps with idle amperage and such. They are also good for folks who have an upgraded aftermarket audio system, same concept.

 

[AtomicHoe094]

instead of that OEM one, try this, its cheaper.. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=190319158779 comes with a harness..

 

[Alex29573]

i got the 165 deg thermostat and my temp gauge hangs out at 1/4... but when i idle for like 30 minutes it climbs and it once got up to halfway


then i just go around the block and it will drop back down pretty quick

I live in miami and its hot, dont have my e fans installed yet either...

 

[TheFuzz]

Thanks Jenna. I'll try to stack my loot up this summer so I can get the fans purchased, then I'll have Justin turn the PINs on down in the springs this september if you guys end up coming out.

Atomic, those fans are nice because of the lower price, but they are used and out of a '99 truck...I dunno how well I trust 10 year old fans. I'd rather pay them extra money and get brand new OEM ones, personally.

 

[JennaBear]

instead of that OEM one, try this, its cheaper.. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWAX:IT&item=190319158779 comes with a harness..

That isn't a harness, just a bunch of resistors, so the fans will be on high all the time probably.

The OEM fans allow for both on high, both on low, one on high, one on low or both off. They turn on based on your speed and the temperature, so when you are on the highway (lots of cold air coming in), the fans will turn off, saving you the power.

 

[AtomicHoe094]

just trying to help.. ill keep my eyes out for you tho

 

[TheFuzz]

just trying to help.. ill keep my eyes out for you tho

It's all good bro, thanks for spying em for me.

 

[Max]

There is also an autoparts store on there that is selling brand new OEM fans for the Tahoes/Yukons for $250 shipped, but that's just the fan assembly, you'd still need the harness and anything else needed to make them work. Is $250 good for the OEM fans though?

http://cgi.ebay.com/ebaymotors/05-0...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

Jenna, I'm a little confused as to how your harness works. Does it plug into the PCM to control the fans? If so, since my truck has a mechanical fan, does the PCM need to be re-programmed to utilize the harness? Does the overdrive pulley have to be used, or is it optional?

Justin probably turned the pin on when he did your tune, and those are the same fans I bought for mine off ebay...wait a bit and he will sell them for $200 every once and awhile. Throttle response is vastly improved and the fans perform flawlessly in 100º heat...my a/c is fanfuckingtastic now too.

 

[AtomicHoe094]

has anyone tried those red fans TY put up??
http://cgi.ebay.com/ebaymotors/CHEVY...Q5fAccessories
have you guys ever heard of FFDYNAMICS???