E-Fans?? Pulleys??........

[bigterp]

Originally Posted by cajunboy2208

Read on the f150Forum that on 4.6 it does not increase MPG or HP.
But on the 5.4 some said you will get 20-30 more mpg per tank, which is like 0.7-1.1mpg increase.
I am guessing this will only be in the summer time though when you do use your AC.
And as for the HP increase with 5.4, I doubt it would be anything noticeable, all it is doing is freeing up a clutch.
The biggest outcome from this would be to lessen the miles on your water pump.
I would spend no more than 200 on a total setup.

I do plan on doing this mod tho on my 5.4

I'm looking at about $275 with the setup I plan to get. I'm ok with that amount, as it seems to be a quality kit that I can rely on. I'll most likely drop in some UD pulleys at the same time, so hopefully I'll notice a little more HP increase by doing the two mods together rather than just the e-fan upgrade.

[jmwilso2]

I've decided that it is not the temp setting of the efan that is causing my low coolant temp. I pulled the fuse for the fan today and am still getting temps in the low 190s. I'm now thinking that my themostat is actually stuck partially open or is a cooler thermostat then is supposed to be in there I'm going to switch it out for a new one tomorow.

[Jackpine]

I'm fairly certain the stock thermostat is a 195 degree one. I personally would not use one colder than that. The engines are designed to operate in the low 200 degree region, and yes, when I'm just driving my truck on the highway in our "fall" temperatures in the high 80s, the CHT tends to stabilize around 205 degrees.

- Jack

[jmwilso2]

ok I guess mine is running about the same temp as yours then. I guess I'll skip swapping the thermostat for a new one.

Thanks for the help

Joe

[swiftvision]

Is there any need to get a new Gryphon program if you upgrade to E-fan and UD pullys?

[ticopowell]

Nope, but if you do the pulleys you might want to increase your idle speed by a bit to make sure your alternator still charges everything while idling.