Electric Fans 8.1L Big Block

[dcarver]

I'm thinking of converting my 02 8.1L to E-fans. Now I know everyone recommends this mod but I've heard the 8.1 needs a lot more cooling. Flex-a-lite has a kit that flows 5500CFM. Would this be enough for towing 7k lbs in 100* heat?
And if anyone has this motor, did it make a noticeable difference?

 

[ccapehartusarmyINF.(ret)]

your worried about a little heat when your towing 7000lbs with an 8.1 liter wich im going to assume is in a 1 ton yer truck should barely break a sweat its capable of towing double that amount

---------- Post added at 06:13 PM ---------- Previous post was at 06:10 PM ----------

ive never had the 8.1 liter but ive towed 14000lbs with a stock 7.4 liter 2500 in 100 dagree weather

 

[dcarver]

Well it's a 02 yukon xl 2500 but ya it doesn't notice the trailer very much lol. I've just seen reviews good and bad for the E-fans so I'm still undecided.

 

[ccapehartusarmyINF.(ret)]

i cant decide either with the e fans because
yer stock fan is ran by a belt and efans use current off yer alternator wich also happens to be ran by a belt im just not seein how one could be more beneficial then the other
how many amps to efans typically draw
my stereo draws quite a bit of juice i have a 250 amp alternator to handle it but
so id prefer not to put more of a drain on my alternator unless its worth it becuase here in AZ it gets pretty warm under that hood in the summer

 

[jaysonsimmons]

Hi guys...

I have the 8.1 2002 Yukon XL as well... did you end up converting to the E-Fans? I live near Palm Springs California... but used to live in Yuma. All too familiar with 110+ heat lol

 

[OR VietVet]

Ever thought of keeping the belt driven fan and adding a pusher fan instead of a puller fan? Can have it switched so can turn on when you want like a long climb up a 6-7 degree hill towing whatever.

 

[01Konvict]

Each fan on high draws just below 30 amps, mine measured around 27-28 amps. Not sure what they draw on at low but would guess 15 or less. If I remember correctly both are never on high together might be wrong but going off memory without looking at the schematic. I think its one fan on high for engine temp high and one fan on high when running AC. But when both are true its low for both fans. IMO its a great mod since 05+ all have them. I will try to post the schematic to show how there wired up

 

[dcarver]

Jason- I have not installed the E-fans. Still deciding on if they will help or not on the 8.1 due to the larger cooling needs it requires.

Raiderron- The stock fan keeps it cool even when towing so I don't necessarily need an extra fan.

Does anyone know if the 05+ 8.1 came with E-fans? I know the 5.3s did, but can't seem to find an answer to that online.
If they did then I will try and find the stock setup and install it instead of aftermarket fans.

 

[YukonXL04]

Well worst case you end up selling them. There's no shortage of people looking for them. Shouldn't have a problem getting rid of them.