Flex Fan - Stock or Aftermarket? - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
LinkBack Thread Tools
post #1 of 3 (permalink) Old 06-26-2019, 11:08 AM Thread Starter
Registered User
 
Join Date: May 2010
Posts: 134
Flex Fan - Stock or Aftermarket?

Ok, now that I got my fuel questions straightened out and got my system ordered, next part that has been troubling me is the fan aspect.

My truck came with a stock 5 bladed flex fan from Ford, it was for trucks without AC, mine has dealer AC installed. I looked at my parts and illustration guide and there are 3 different fans listed for my application, the 5 bladed flex fan D7TZ-8600-A for non AC trucks, then there is a E0TZ-8600-A that is listed as w/o clutch that is a 7 bladed fan, cant find anything on this so I don't know if this is a flex fan also or if its just a rigid steel fan. last is the D8TZ-8600-A clutch fan that is 5 bladed.

Question is, since my truck is upgraded by the dealership to have AC I am seriously contemplating getting rid of the 5 bladed 18" flex fan in place of the E0TZ-8600-A if it is a flex fan as it has two extra blades and is 1/4" bigger in diameter. I don't think I want to go clutch as I cant find any thermal clutches just RPM based which wont help my AC any.

I know some would want to recommend electric, but for now until I do my 3G alternator upgrade down the road I just don't have the amperage to spare for running an electric condenser fan.

So that leaves me with just the 7 bladed fan. I see Flex-A-Lite has their 1818 flex fan which is a off set 7 bladed 18 1/4" flex fan designed to operate quieter due to the off set spacing just like how my 5 bladed is off set.

Problem is I never used Flex-A-Lite and the only one I have been exposed to is on a old Grumman van we put a motor in at work that had no fan shroud and that thing sounded like a plane taking off.

So my question is between the E0TZ-8600-A which I cant locate any information on let alone find one for sale and the Flex-A-Lite 1818 fan which one would people recommend as giving the best performance in terms of being quiet and not sounding like a plane trying to take off? My 5 blade you don't even hear it and would like to keep it that way.
Rusty_S85 is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 06-26-2019, 12:32 PM
Registered User
 
Join Date: Apr 2001
Location: Central West Virginia
Posts: 7,357
Re: Flex Fan - Stock or Aftermarket?

A flex fan will consume a solid 30 horsepower up around 5k rpm. Clutch fans do a little better, but not much. Huge gains to be had with electric fans.

If you watch the video below, they test different fans on a 5k rpm engine making 3xx horsepower. The fans all absorb between 20 and 30 horsepower. The fixed factory fan was the worst at 30. Flex fans, plastic and clutch fans were all between 20 and 30.

https://www.motortrendondemand.com/d...ut/0_olymz420/

If you cannot view it, you can get a 14 day free trial to Motortrend.
n2omike is offline  
post #3 of 3 (permalink) Old 06-26-2019, 06:38 PM Thread Starter
Registered User
 
Join Date: May 2010
Posts: 134
Re: Flex Fan - Stock or Aftermarket?

Quote:
Originally Posted by n2omike View Post
A flex fan will consume a solid 30 horsepower up around 5k rpm. Clutch fans do a little better, but not much. Huge gains to be had with electric fans.

If you watch the video below, they test different fans on a 5k rpm engine making 3xx horsepower. The fans all absorb between 20 and 30 horsepower. The fixed factory fan was the worst at 30. Flex fans, plastic and clutch fans were all between 20 and 30.

https://www.motortrendondemand.com/d...ut/0_olymz420/

If you cannot view it, you can get a 14 day free trial to Motortrend.
Yep I heard about the power consumption. For me I just need something temporary till I get around to doing my 3G alternator upgrade. Right now I don't have the amps to power everything in my truck along with electric fans.

I do think I might go with an electric fan later on, but for now my choice is stick with the 5 bladed flex fan which is intended for non AC applications, go with a 7 bladed flex fan which I think is intended for AC applications, or go with the 5 bladed clutch fan. I don't want to go this route though on the clutch fan as every clutch I find is a HD RPM based not thermal. Ive had the HD clutches before and they make a lot of noise.

My current 5 bladed flex fan is actually quite to the point you don't hear it at all.

The Flex-A-Lite 7 blade is offset on the blades like my 5 blade is so in theory it should be as quiet. I don't know.
Rusty_S85 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Muscle Forums : Ford Muscle Cars Tech Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome