• Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

Flex Fans

  • Thread starter Thread starter Pbum5
  • Start date Start date May 19, 2005

Pbum5

Member
Oct 27, 2004
515
0
17
Minneapolis, MN
May 19, 2005
#1
  • May 19, 2005
  • #1
Hey does anyone have any recommendations on a flex fan?
I have a 4-Row and flex fan that doesn’t do much.
It runs cool but when I am stopped in traffic for a while it can get warmer than I like.

Anyone suggestions for a better flex fan?
 

2nd Mustang

Founding Member
Feb 24, 2002
2,488
0
46
Southern California
May 19, 2005
#2
  • May 19, 2005
  • #2
I have a 4 row and a flex fan with NO shroud. The hottest it runs is 190 degrees, winter or summer.

How hot is too hot for you?
 
M

my66coupe

Founding Member
Apr 30, 2002
1,134
0
36
Arizona fountain hills
May 19, 2005
#3
  • May 19, 2005
  • #3
I ditched my flex awhile ago, Ive also heard nothing but bad about them. I would go for a stock clutch fan set up with a shroud or a big electric...

Mike
 
R

ron67fb

Founding Member
Aug 3, 2001
1,117
0
36
SF Bay area, CA
May 19, 2005
#4
  • May 19, 2005
  • #4
Make sure your fan is as close to the radiator as possible, especially without a shroud. If you have a shroud at least half the blade should be in the shroud.

I had a "high rpm" flex fan throw a blade chunk on me below 4000rpm, it cut the radiator hose and dented the hood. Imagine if it flew off while I was checking the advance on my distributor. I switched to electric. I don't want any more blades spinning at engine speed when I'm under the hood.
 

rbohm

Founding Member
Apr 12, 2002
6,698
550
204
tucson,az
May 20, 2005
#5
  • May 20, 2005
  • #5
probably the best flex fan on the market today as far as i am concerned is the plastic ones made by flex-i-lite. they are durable, pull a bunch of air, and lightweight. that said however, i would recomend getting an electric fan from a salvage yard from a ford taurus and using that instead with a good fan controller.
 
S

Sicarius428

Active Member
Jan 6, 2004
2,085
5
49
May 20, 2005
#6
  • May 20, 2005
  • #6
Have a flex fan in my 70 and it sucks or lack of it. I am headed the electric route myself once I use my 90 as a test mule.
Kevin
 
S

steel1212

Active Member
Jun 24, 2004
1,180
0
36
Frankfort, Ky
May 20, 2005
#7
  • May 20, 2005
  • #7
I have a flex-a-lite 6 blade fan on my 302 and its .060 over and I haven't had a overheating problem once.
 

Pbum5

Member
Oct 27, 2004
515
0
17
Minneapolis, MN
May 20, 2005
#8
  • May 20, 2005
  • #8
2nd Mustang--

My car runs at about 175 all day long.
Just when I am stopped for a long time idling it creeps up to maybe 210.
Then if I start to drive it and get some air in there it goes right back down.


ron67fb-
throwing a blade!! You are lucky you were not working on it at the time. Maybe I should consider an Electric.

Rbohm-

Are you talking about this fan?

FLX-418

http://store.summitracing.com/defau...earchinresults=false&N=0&target=egnsearch.asp

for $17.00 it would be worth a shot.

steel1212-
which Flex-a-Lite model do you have?


Right now mine looks similar to this one.

SUM-G4940

http://store.summitracing.com/defau...earchinresults=false&N=0&target=egnsearch.asp
 
R

ron67fb

Founding Member
Aug 3, 2001
1,117
0
36
SF Bay area, CA
May 20, 2005
#9
  • May 20, 2005
  • #9
You didn't mention how close the fan is to the radiator, and if you have a shroud or not.

You could also put a small (12" to 14") pusher electric in front of the radiator to turn on manually when you're stuck in traffic. Doesn't sound like you're overheating, just "uncomfortable". The extra pusher should be just enough for those times.
 

Pbum5

Member
Oct 27, 2004
515
0
17
Minneapolis, MN
May 20, 2005
#10
  • May 20, 2005
  • #10
No shroud,
and overheating is not an issue.
Just want it to run cooler if I am every stuck in traffic for a while.
I’ll have to look at it to see how close it is to the radiator.
 
S

steel1212

Active Member
Jun 24, 2004
1,180
0
36
Frankfort, Ky
May 20, 2005
#11
  • May 20, 2005
  • #11
Its the 1316 model. I also use the spacer to get it right up on the rad, but I don't have a shroud either.
 

302 coupe

Founding Member
Mar 2, 2000
1,952
3
36
Macon, Ga.
May 20, 2005
#12
  • May 20, 2005
  • #12
an electric fan is the way to go. If you're a purist, stick with a stock fan, or fit a clutch to the stock fan. Otherwise, electric fans
 

65fastback2+2

New Member
Aug 4, 2003
1,229
0
0
Louisville, KY
May 21, 2005
#13
  • May 21, 2005
  • #13
i have a 7-blade thunderbird big block fan in mine niceeeeeee
 
You must log in or register to reply here.

Similar threads

Engine Themostat
  • Mindseye007
  • Jan 30, 2026
  • Fox 5.0 Mustang Tech
  • 2
Replies
21
Views
646
Fox 5.0 Mustang Tech Feb 1, 2026
86HO5.0
8
Cooling fan identity
  • SteveG94GT
  • Apr 12, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
6
Views
124
1996 - 2004 SN95 Mustang -General/Talk- Apr 12, 2026
SteveG94GT
Z
Cool fan issues
  • Zipcity
  • Dec 23, 2025
  • 1994 - 1995 Specific Tech
Replies
12
Views
581
1994 - 1995 Specific Tech Dec 27, 2025
manicmechanic007
M
cooling fan not turning on, but does when ac is on or when coolant temp is jumped or unplugged.
  • Mycarhatesme
  • Mar 14, 2026
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
2
Views
161
1996 - 2004 SN95 Mustang -General/Talk- Apr 12, 2026
Noobz347
J
V-6 thermostatically controlled cooling fan - on when cold - new behaviour
  • jacekk
  • Oct 1, 2025
  • 2005 - 2014 Specific V6 Tech
Replies
0
Views
135
2005 - 2014 Specific V6 Tech Oct 1, 2025
jacekk
J
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?