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

bigterp · #1 Wed, September 15th, 2010, 10:11 AM

Hi all. I've been trolling the forums for awhile now and finally decided to hit you all with my first post. I recenlty purchased an '07 supercab F150 FX4 5.4L 4x4, 45,000 miles. I'm currently working on a Magnaflow SI/DO same side exit Performance Cat-Back, a Gryphon with custom tunes and was also going to add a CAI. After talking with Corey from PHP she convinced me to do the gotts/DVM mod which I just completed over the weekend.

So now that I have an extra $300 bones to spend I'm trying to decide what to do next. I'm leaning towards doing an e-fan conversion. Specifically this one from FF Dynamics: Fan Kit. I'm also intrigued by the underdrive pulley kits that I here alot about. I've tried to research them but still don't fully understand what they do and how they help performance.

I'm looking to increase the performance of my truck. So I guess my questions are:

1. Should I do the e-fan conversion?? If so, will my custom tunes need to be adjusted? Any experience with the FF Dynamics kits??
2. Should I do the pulley conversion?? If so, will my tunes need adjusted, and what is a good kit for my F150?
3. Should I stay away from both and put my $300 towards something else? If so, what?

Any and all input is greatly appreciated. Thanks in advance!!!!

***Longshot270*** · #2 Wed, September 15th, 2010, 11:51 PM

I've heard great results from e-fans but I have never had a set myself. Personally, I would go with an underdrive pulley kit. Neither kit actually gives you more horsepower but they free up prexisting power that was lost from the fan or the other belt driven accessories.

Your tunes will not need to be adjusted by adding either one of the options.

bigterp · #3 Thu, September 16th, 2010, 10:13 AM

Thanks for the reply Longshot!!! I'm for sure looking at doing either the e-fans or pulleys for now, and possibly down the road ending up with both mods

Now I've also read that doing BOTH the e-fans and pulleys can cause issues. Not exactly sure what issues, maybe altenator?? Has anyone heard of issues with doing both?? I would love to hear some feedback on those that have done both mods!!! It's nice to now that doing either or both of these mods won't require any adjustments to my custom tunes, which means I can go ahead and get that Gryphon ordered!!!

And I almost forgot, how hard are aftermarket performance pulleys to install?? Something I can do in my driveway with a little bit of knowledge?? Any particular brand you guys would reccomend??

Thanks!!!!

jmwilso2 · #4 Thu, September 16th, 2010, 08:31 PM

Hi Bigterp, my truck is almost the same as yours. I just installed a flexalite monster fan. It does work very well and I have no doubt it has freed up some hp but im not seeing the fuel economy gains I had expected. There is a slight improvement but not nearly as much as other posts I have read indicate.

bigterp · #5 Thu, September 16th, 2010, 10:55 PM

Sounds good jmwilso. How tough were the fans to install? Do you have any power issues since installing the e-fans, like lights dimming at idle etc.?? Thanks for the reply man!!!

jmwilso2 · #6 Fri, September 17th, 2010, 09:39 PM

The install is pretty simple as long as you get a fan clutch removal tool. I got one at Part Source. They have a loan program where you pay full price ($190) for a used tool but get your money back when you return it. I had to slightly relocate what I think is an ABS control unit of some sort. But I only had to move it a few inches back. I've experienced no problems with light dimming or anything of that nature. I set my gryphon to show battery voltage for a while and it all stayed normal. The only problem ive had is that I forgot to check what my engine coolant temp was normally at before the install so I just guessed at what temp to set it. Its currently set to 194 F but I think this may be too low. Ive been looking on the web for what the normal operating range is but can find nothing. If anyone here can tell me I'd appreciate it though.