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)
http://i30.tinypic.com/rkah5t.jpg

Vs.

without a shroud (JK Motorsports)
http://i25.tinypic.com/2en6cmh.jpg

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.

[Yuke2K]

So Jenna and JK, what are your opinions about the kits that Ty found on e-bay? The sellers seem kinda like dickheads, 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 piece of shit 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>?

[Yuke2K]

which kit>?

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

http://cgi.ebay.com/ebaymotors/CHEVY-TAHOE-YUKON-ELECTRIC-COOLING-FAN-KIT-MORE-MPG-HP_W0QQcmdZViewItemQQ_trkparmsZ65Q3a12Q7c66Q3a2Q7c 39Q3a1Q7c72Q3a1205Q7c293Q3a1Q7c294Q3a50QQ_trksidZp 3286Q2ec0Q2em14QQhashZitem19ade7565fQQitemZ1102918 01695QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessori es


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/05-06-TAHOE-YUKON-SUBURBAN-ESCALADE-OEM-ELECTRIC-FANS_W0QQcmdZViewItemQQ_trkparmsZ65Q3a12Q7c66Q3a2Q 7c39Q3a1Q7c72Q3a1205Q7c293Q3a1Q7c294Q3a50QQ_trksid Zp3286Q2ec0Q2em14QQhashZitem2ea66b3ccbQQitemZ20036 0541387QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries

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...

[Yuke2K]

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

[Yuke2K]

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/05-06-TAHOE-YUKON-SUBURBAN-ESCALADE-OEM-ELECTRIC-FANS_W0QQcmdZViewItemQQ_trkparmsZ65Q3a12Q7c66Q3a2Q 7c39Q3a1Q7c72Q3a1205Q7c293Q3a1Q7c294Q3a50QQ_trksid Zp3286Q2ec0Q2em14QQhashZitem2ea66b3ccbQQitemZ20036 0541387QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries

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???

[Yuke2K]

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.

Yeah you're part of the reason I'm seriously considering doing this mod now. My truck is still a dog off the line so I'm thinking between the e-fans and an intake, throttle response would be a shitload better.

The house deal didn't work out so we're gonna move in with the in-laws for a bit, which will save us a bunch of loot every month. Pay off some debt then buy some truck stuff.

[JennaBear]

You should go with a cam and headers if you are wanting throttle response. The e-fans really just make the truck more efficient.

[Max]

Or just do everything. I can't wait to scoop my tvs :rocking:

[JennaBear]

Or just do everything. I can't wait to scoop my tvs :rocking:

Just don't pull a Justin and let it sit in the garage for a few weeks without installing it... :Plugged:

[Max]

Hahaha what a buster!

[Yuke2K]

You should go with a cam and headers if you are wanting throttle response. The e-fans really just make the truck more efficient.

I've got an LQ4 on the way to me right now, I'm saving the cam and headers for that. ;)

[tybardy]

crazy how many options there are... im wanting to do this mod very soon. Im exploring some options, Im hoping Grocery Getter come through with some OEM fans on the cheap

---------- Post added at 11:53 AM ---------- Previous post was at 11:46 AM ----------

how much is the overdrive pully and where to buy?

[Yuke2K]

Jenna has em on the BBP site for $30/ea. If you get the fan control harness and the pulley at the same time, the pulley is only $20. No reason not to get it, IMO...can't do anything but help. The package is $109 shipped for both.

http://www.blackbearperformance.com/services.asp

[tybardy]

where would i be without my TYF family?

[Yuke2K]

I dunno man, but at least the torsion keys didn't kill ya. ;)

:cheers:

[oreowizard98]

This is something I would like to do aswell. Im new to the site and Im still gathering info. Im a big DIYer. I rebuilt the engine in my T/A so I think this would be a breeze. Just to get this straight, I want any 05+ dual e-fan set up the harness and pulley? Then I need to have a tuner turn the pins on? And possibly drop in a lower temp t-stat? Do I have is pretty much covered?

[Max]

I wouldn't worry about tstats, just make sure your charging system is up to the task.

[JennaBear]

I wouldn't worry about tstats, just make sure your charging system is up to the task.

X2 I wouldn't worry about a t-stat, if anything, just an OD pulley for your alternator, or a larger alternator.

[oreowizard98]

is that not in the package that Jenna offers? The gold looking pulley. I'm thinkn of beefn up the amp. Going to run a small audio setup

[JennaBear]

We sell a harness and an OD alt pulley, no t-stats though.

[coopiesb]

ok found a fan kit and its asking if i have a 28" or 34" radiator... im not sure does anyone know i have an 2004 hoe

[JennaBear]

If you have a towing package or a Z71, then you probably have the larger one.

[coopiesb]

no z71 or towing......... so you think the smaller one?? maybe i can wait until the tune and let justin to take a look and tell me what i got.....

[tybardy]

you can always pull a tape measure on it...

another questions guys. can you get a different size belt and disconnect the clutch fan from the belt completely? seems like this would completely eliminate the drag on the belt

[coopiesb]

you can always pull a tape measure on it...

another questions guys. can you get a different size belt and disconnect the clutch fan from the belt completely? seems like this would completely eliminate the drag on the belt

if i was there i would maybe i can measure one of the hoes the civilains drive around here hahaha:Handshake:

[OKLAGMCRUISER]

you can always pull a tape measure on it...

another questions guys. can you get a different size belt and disconnect the clutch fan from the belt completely? seems like this would completely eliminate the drag on the belt

you'll be removing the clutch fan to install efans, but the pully won't amount to much undo stress to be worth going the entire route of pulling it and getting a shorter belt.

---------- Post added at 05:22 PM ---------- Previous post was at 05:21 PM ----------

This is something I would like to do aswell. Im new to the site and Im still gathering info. Im a big DIYer. I rebuilt the engine in my T/A so I think this would be a breeze. Just to get this straight, I want any 05+ dual e-fan set up the harness and pulley? Then I need to have a tuner turn the pins on? And possibly drop in a lower temp t-stat? Do I have is pretty much covered?

depending upon your radiator size for a stock look you may need the 34" radiator too.

[JennaBear]

you can always pull a tape measure on it...

another questions guys. can you get a different size belt and disconnect the clutch fan from the belt completely? seems like this would completely eliminate the drag on the belt

No, that turns the water pump.

[tybardy]

so the crank that turns the fan is also the h2o pump? thats interesting... no wonder i couldnt find that coolant leak at my water pump, i was looking in the wrong places

[JennaBear]

Yes sir. I am gonna start charging you, for solving all your problems!

[tybardy]

hhahahahaha man my bill is gonna grow at an alarming rate!!! just dont get the rest of the forum in on this, i will be broke my monday

[OKLAGMCRUISER]

hhahahahaha man my bill is gonna grow at an alarming rate!!! just dont get the rest of the forum in on this, i will brake my other arm by monday
fixed

[tybardy]

buaaaaahahahahaha fucker

[WoldD90]

I installed two 16" Procomp fans on my 04 Yukon XL with the 6.0. I bought them off some guy on the old forum. It came with a wiring kit that had a tap for the water jacket a relay and wiring for two fans. This kit was a POS. The fans pulled more amps then stated and I burned through the relay, the fuse and the wiring kit died.

I did not notice any appreciable benefit from the conversion, with the exception of the noise in hot weather from the fan clutch engaging when the AC is on, on a hot day.

I have a dual fan set up on my Land Rover and I was able to see a good increase in HP/Torque. But with our trucks having a good bit of HP from the factory, I did not see much of anything.

If you are going to do this, I would wire each fan up separately with it's own relay, fuse and wiring, this way if there is some sort of a problem, you will have at least one fan working.

I left my stock fan shroud on to keep the air focused as it flows through the radiator.

[JennaBear]

That is exactly why I refer folks to stick with the stock set up and allow the PCM to control the fans. The OEM fans work flawlessly and you don't have to rely on a switch or temp probe.

[BOSS]

That is exactly why I refer folks to stick with the stock set up and allow the PCM to control the fans. The OEM fans work flawlessly and you don't have to rely on a switch or temp probe.

Do the PCM controlled come on with the ac clutch? Can you adjust the temperature at which the fans turn on with PCM?

B

[JennaBear]

The PCM turns on the fans based off of temperature and/or AC pressure. The fans are also disabled above a certain speed.

[T3rry]

instead of tuning your current pcm, could you just swap out your current one for an 05+ one?

[OKLAGMCRUISER]

instead of tuning your current pcm, could you just swap out your current one for an 05+ one?

IIRC you'll create more issues going this route than to spend the money to hvae a BB tune. THe benefits of a BB tune greatly outweigh that of just getting a stock for stock swap pcm.

Pat

[tybardy]

IIRC you'll create more issues going this route than to spend the money to hvae a BB tune. THe benefits of a BB tune greatly outweigh that of just getting a stock for stock swap pcm.

Pat



X2

tune the pcm, there are so many benifits and you will NOT regret it!

[T3rry]

yeah, i understand the benefits, i just haven't done my research on it, and last i heard about people getting their tuned, they had to use premium fuel, decreased fuel mileage, etc...

also when i got one tuned for my 01 grand am, it cost me a lot of money, i had to buy one and put up a core for my current one, got the new one, shipped back my core, it got lost in the mail, i got screwed for the $100 or whatever, and then the tuned one wasn't working properly.


and i am in Canada, so shipping aint cheap :/

[OKLAGMCRUISER]

yeah, i understand the benefits, i just haven't done my research on it, and last i heard about people getting their tuned, they had to use premium fuel, decreased fuel mileage, etc...

also when i got one tuned for my 01 grand am, it cost me a lot of money, i had to buy one and put up a core for my current one, got the new one, shipped back my core, it got lost in the mail, i got screwed for the $100 or whatever, and then the tuned one wasn't working properly.


and i am in Canada, so shipping aint cheap :/


you can get a tune for 87, but the benefits of a BB 93 tune actually GAIN you MPG fuel economy and the extra cost for fuel outweighs the cost of the tune and fuel cost by the MPG increase! You can get an in person tune from BB for around $250.00! Hit up Jenna or Justin with BB for more insight!

Pat

[JennaBear]

instead of tuning your current pcm, could you just swap out your current one for an 05+ one?
No, you would need to have the PCM tuned for your vehicle (ie. VIN, year, make, model)

yeah, i understand the benefits, i just haven't done my research on it, and last i heard about people getting their tuned, they had to use premium fuel, decreased fuel mileage, etc...

also when i got one tuned for my 01 grand am, it cost me a lot of money, i had to buy one and put up a core for my current one, got the new one, shipped back my core, it got lost in the mail, i got screwed for the $100 or whatever, and then the tuned one wasn't working properly.


and i am in Canada, so shipping aint cheap :/

Who was your tuner? If they have free updates, you should hit them up for an update if you are unhappy with your current tune.

[bass1775]

Okay, What's the best way to add these e-fans to my 98 hoe? I had a set of dual 15's (*Perma-cool) I had nothing but problems with the fans coming aloose from the motors. Had them repaired under warranty. happened again, took them out went back to stock setup. They came pre-wired, radiator probe adjustable temp setting and tapped into AC switch. Would like to try again but, may need more research. Any ideas? How about those flexalites?

[OKLAGMCRUISER]

Okay, What's the best way to add these e-fans to my 98 hoe? I had a set of dual 15's (*Perma-cool) I had nothing but problems with the fans coming aloose from the motors. Had them repaired under warranty. happened again, took them out went back to stock setup. They came pre-wired, radiator probe adjustable temp setting and tapped into AC switch. Would like to try again but, may need more research. Any ideas? How about those flexalites?

you might want to try a new thread in the 91-99 hoe section.

Pat

[Yuke2K]

you might want to try a new thread in the 91-99 hoe section.

Pat

+1 on this. Since you have an OBS, you'll probably need to do a ground-up build. There are no PCM controlled options or OEM options for your year.

Flex-a-lite makes a very good product, that should be a good starting point. On your old kit, was it just that actual fans that were giving you problems? If thats all it was and you still have all of the wiring and stuff, you might be able to reuse alot of it, as long as it's in good shape.

[NoChrome]

Im a cheap skate, and have a dd avalanche with 157k, I used fans off of an LS1 Camaro, cut my stock shroud and mounted them inside. Went to autozone and used a stand alone controller. It got me about 3mpg and no overheating issues even with the A/C on towing in the Mojave desert at 116* Best $100 I ever spent.