Flex Fan
Thread Starter
|
Member
Joined: Feb 2001
Posts: 12
Likes: 0
From: Leesburg, Va. U.S.A
Flex Fan
I'm looking into replacing my stock radiator fan with a Flex Fan. It's probably not as efficient as the electric fan alternative but I can get a "bolt on" Flex Fan for less than $40. Does anybody have any experience with Flex Fans?
------------------
2000 XLT Ext Cab S.B. 4x2
4.2 L, 5 sp man, 3.55 gears
4 wheel discs (ABS x 4)
Jeraco Fiberglass cap
All Star bedliner
------------------
2000 XLT Ext Cab S.B. 4x2
4.2 L, 5 sp man, 3.55 gears
4 wheel discs (ABS x 4)
Jeraco Fiberglass cap
All Star bedliner
Member
Joined: Jan 2001
Posts: 77
Likes: 0
From: Crosby Tx
Yes, if you don't use a clutch a flex fan is real noisy!
------------------
2001 Super Crew Built 10/00 purchased12/00 Lariat 5.4 4X4 Bright Red,Tow Package, 1.42" Radaitor, Factory Steps, K&N air filter, A.R.E. LS II, Rear Seat Entertainment System, Sound System Upgrades, DRL'S, Vent Shade Vent Visors, Stampeede bug Deflector. Owner installed "Off Road Package" with custom made decal. Hope to upgrade soon to Gibson SS or Dual Sport!
------------------
2001 Super Crew Built 10/00 purchased12/00 Lariat 5.4 4X4 Bright Red,Tow Package, 1.42" Radaitor, Factory Steps, K&N air filter, A.R.E. LS II, Rear Seat Entertainment System, Sound System Upgrades, DRL'S, Vent Shade Vent Visors, Stampeede bug Deflector. Owner installed "Off Road Package" with custom made decal. Hope to upgrade soon to Gibson SS or Dual Sport!
Technical Article Contributor
Joined: Dec 1997
Posts: 9,417
Likes: 11
From: Windsor,Ontario,Canada
HandyMan,
You might be wasting your money. Your truck has fan clutch which slows down your fan when it doesn't need it. The flex fan is designed to change the pitch of the blades when spinning at high rpm which reduces the drag. You will need to know at what rpm the pitch changes on the flex fan. The OEM clutch allows the fan to turn at 1500 rpm when the water pump is turning at 3000 rpm when not needed and min 2300 rpm when needed.
So at a water pump speed of 5000 rpm the fan turns at between 2500 and 3800 rpm. So if the fan starts to flex at 4000 rpm it is not realy needed.
Regards
------------------
00 F-150 XLT SC Flairside 4x4 4.6 w/5spd 3.55LSD
Warn XD9000i, skid plates, Draw tite class III,
Rancho RSX Reflex shocks, MAC 8.8 Axle Girdle
BFG 285/75 R16 MTs,
Borla Cat Back, Hedman Headers,
Custom air intake system with modified
air box, Ported Throttle body,
Shortened MAF sensor tower,
K&N air filter,
Superchips
You might be wasting your money. Your truck has fan clutch which slows down your fan when it doesn't need it. The flex fan is designed to change the pitch of the blades when spinning at high rpm which reduces the drag. You will need to know at what rpm the pitch changes on the flex fan. The OEM clutch allows the fan to turn at 1500 rpm when the water pump is turning at 3000 rpm when not needed and min 2300 rpm when needed.
So at a water pump speed of 5000 rpm the fan turns at between 2500 and 3800 rpm. So if the fan starts to flex at 4000 rpm it is not realy needed.
Regards
------------------
00 F-150 XLT SC Flairside 4x4 4.6 w/5spd 3.55LSD
Warn XD9000i, skid plates, Draw tite class III,
Rancho RSX Reflex shocks, MAC 8.8 Axle Girdle
BFG 285/75 R16 MTs,
Borla Cat Back, Hedman Headers,
Custom air intake system with modified
air box, Ported Throttle body,
Shortened MAF sensor tower,
K&N air filter,
Superchips
Thread Starter
|
Member
Joined: Feb 2001
Posts: 12
Likes: 0
From: Leesburg, Va. U.S.A
Thanks for the feedback guys.
JMC, that's a great picture in your signature!
------------------
2000 XLT Ext Cab S.B. 4x2
4.2 L, 5 sp man, 3.55 gears
4 wheel discs (ABS x 4)
Jeraco Fiberglass cap
All Star bedliner
JMC, that's a great picture in your signature!
------------------
2000 XLT Ext Cab S.B. 4x2
4.2 L, 5 sp man, 3.55 gears
4 wheel discs (ABS x 4)
Jeraco Fiberglass cap
All Star bedliner
