Is it OK to run dual fans constantly?
#1
Supreme Member
Thread Starter
Join Date: May 2002
Location: Texas
Posts: 1,332
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Z28 Convertible
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23 with Eaton posi
Is it OK to run dual fans constantly?
I have a manual switch in the dash to run both fans simultaneously. Some say running dual fans impedes airflow above 35mph. Is there any truth to this?
#2
Supreme Member
iTrader: (3)
Join Date: Jan 2004
Location: Las Vegas
Posts: 2,663
Likes: 0
Received 239 Likes
on
179 Posts
Car: 1987 Formula (original owner)
Engine: 305 TPI
Transmission: T5
Axle/Gears: 9-bolt/3.45
Re: Is it OK to run dual fans constantly?
Whether it does or does not impede airflow, and manual switch or not, if everything is operating properly, then there shouldn't be any need to run the fans at all when you're moving at a steady cruising speed, let alone run them all the time.
Most likely, the things that will be hurt by running your fans all the time are the electrical system, the fan relays and fan motors. Then one day you might need those fans, but they won't be there to do their job because they'll have burned-out. And when(not if) that happens, don't curse your car, lol.
Most likely, the things that will be hurt by running your fans all the time are the electrical system, the fan relays and fan motors. Then one day you might need those fans, but they won't be there to do their job because they'll have burned-out. And when(not if) that happens, don't curse your car, lol.
#3
Re: Is it OK to run dual fans constantly?
Along with a manual switch, I recommend wiring up a 3 relay system with temperature control switches to have the fans on at 1/2 speed at lower high temps and at full speed at higher high temperatures. Think of it as insurance or preventative maintenance.
https://www.thirdgen.org/forums/cool...an-wiring.html
https://www.thirdgen.org/forums/cool...an-wiring.html
#4
Senior Member
iTrader: (1)
Join Date: May 2007
Location: Newport Beach, Ca.
Posts: 666
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1988 Iroc
Engine: 383 TPI
Transmission: 700r4
Axle/Gears: BW 9 bolt 3.27
Re: Is it OK to run dual fans constantly?
Matthew, I have noticed on my `88 Iroc 383 TPI that it does run cooler at highway speeds with the fans off. In addition to the fan switch, both of my fans are on toggle switches so I can turn them on at any time and I also have an LED connected to each relay so I know when they are on.
Thread
Thread Starter
Forum
Replies
Last Post
eightsixseven
Tech / General Engine
1
08-14-2015 03:09 PM