Efan

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Mmathw

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Thinking about removing the clutch fan from my 2017 1500 5.7l. From searching this site it sounds like the Efan in the later year 4th gens in good enough and you don’t need to get the V6 Efan? Just want to verify this is true. Also Im confused if I need a tuner for the stock fan to come on at the right temps or am I ok just removing the clutch fan. I rarely tow and it’s mostly a daily driver with some light off-roading. Thanks


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shadowhawk

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you and I seem to be on a similar mod path. The e-fan mod requires a tuner to change the fan settings. I'm seeing quite a few run just the AC fan without replacing the clutch fan.
 

Hemi395

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Yes you will need a tuner and for a 2017 you will need an unlocked PCM for the tuner to work. It also depends on what you're going to be doing with your truck. If you're going to be towing a lot, you may want to leave the clutch fan on or go with the V6 efan...
 

boomstick

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if you dont tune for it then taking the clutch fan off is useless and a 170 stat is recomended when doing the fan delete. of course without a tune your wasting time with any of it.

from my note 8
 
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Mmathw

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Thanks for the quick replies. I was gonna save for a tuner and just remove the fan clutch in the meantime. Guess it can wait until I get the tuner


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shadowhawk

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I think the same thing. I like the idea, but no cash for a tuner until after other mods are done
 
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Mmathw

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I think the same thing. I like the idea, but no cash for a tuner until after other mods are done
Do you know if there’s any issues with just removing it? Guess I could always just do trial and error but trying to save the time of taking it off just to put it back in because of overheating lol


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shadowhawk

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I'm still in the researching phase; I can't answer that
 

Hemi395

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Actually this is the time of year to test that out unless you live in Florida or Arizona or some other place that's warm. It doesn't cost anything to try and if it begins to over heat, put the AC on which will kick the efan on and cool enough to get you home
 

goinyaking

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Been thinking about the efan switch as well. Mmathw or shadowhawk, have you two tried taking out the clutch fan? Any issues so far?
 

Lee Peterson

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If you don't tune for it the Efan won't come on till you reach 220. That's getting hot, not good for valve seats.
 
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Mmathw

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Been thinking about the efan switch as well. Mmathw or shadowhawk, have you two tried taking out the clutch fan? Any issues so far?
Haven’t tried it yet. I’m gonna wait until I get a tuner,


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Jwithing

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It's pretty easy to take off and put back on. I took mine off and ended up putting it back on since I was getting temps up to 220 w/ a 180 thermo and tune. I think I need to flush my coolant in the spring and be sure to replace with the correct coolant. At least, I'm hoping that's the issue. Ive also removed my active shutters sinces and hope that helps once it warms back up. There was a thread on here that had a link to a standing engine Dyno test comparison of various clutch fans compared to no clutch fan and I think the results come down to showing that similar clutch fans to ours steal about 11-14 hp at the crank or something like that. It was a pretty cool video if you can find it.
 

S0CAL

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...ours steal about 11-14 hp at the crank or something like that.

Holy ****, that is not an insignificant performance gain. I am starting to look at the v6 Efan that Hemifever (Matt from Moesperformance) installed in his Youtube video.
 

Jwithing

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Holy ****, that is not an insignificant performance gain. I am starting to look at the v6 Efan that Hemifever (Matt from Moesperformance) installed in his Youtube video.
Yeah, it was quite surprising, you're gonna make me dig up the video now to make sure I'm not pulling numbers out my **** lol
 

shadowhawk

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so 10-14 at the crank is not much at the wheel. Is it really worth it?
 

S0CAL

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so 10-14 at the crank is not much at the wheel. Is it really worth it?

LOL, I am a moth to the flame when talking about squeezing HP out of our rigs. Beyond the HP, it COMPLETELY opens up the engine bay. I think that is pretty damn cool. I installed the Vararam already and after the eFan mod, I may be able to install a hammock! :cool:
 

Jwithing

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so 10-14 at the crank is not much at the wheel. Is it really worth it?

Depends, if you already have a tune,tstat, and don't need to swap fans, why not? Even if you have to swap fans, it's comparable or better and potentially cheaper than some CAI. I took mine off for a week and put it back on, wanting to figure out what my heating issue is so I can take it back off. Definitely felt like there was a slight increase in throttle response imo and that was before a pedal commander. Most consider this a free boost based on having the other components.
 
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