cooling fan question

Kenney Kelley · 02-29-2024, 05:05 PM

Does the electric radiator fan pull air across the radiator from out side of the car
or does it push air to the outside of the car thru the radiator? I'm wiring the fans now and i was wondering how to wire them.

Thank You Kenney Kelley

Keith 944 · 02-29-2024, 05:06 PM

Pulls through rad. Towards the engine.
Or if you have the fan on the other side, push it towards the engine

Myron Piatek · 03-02-2024, 11:48 AM

I've always been under the impression that an electric fan mounted on the "inside" and pulling air from the front into the engine compartment, does a more efficient job of cooling.

It depends if you have enough room on the inside of the radiator. But I believe most fans that mount on the radiator simply require the wires to be swapped to change the direction/rotation.

Larry Hill · 03-03-2024, 08:18 AM

When racing the truck I was told that I had to have a fan. I had a stock water pump with the standard tooth belt and auxiliary 12 volt motor. Tech said go buy a fan and I did and install it. The fan added about 12 OZ to the nose of the truck. It was not any faster or slower with the fan and with the engine being a v6 the blades were so far away they did not generate any air flow across the radiator core.
But to race I had to follow instructions.

Rory McNeil · 03-03-2024, 04:22 PM

Quote:

Originally Posted by Larry Hill

When racing the truck I was told that I had to have a fan. I had a stock water pump with the standard tooth belt and auxiliary 12 volt motor. Tech said go buy a fan and I did and install it. The fan added about 12 OZ to the nose of the truck. It was not any faster or slower with the fan and with the engine being a v6 the blades were so far away they did not generate any air flow across the radiator core.
But to race I had to follow instructions.

That really makes no sense at all, considering that you are allowed to run an electric water pump, that has no provisions for a belt driven fan. I never ran a belt driven fan on my Mustang, even with the stock water pump and a Moroso electric belt drive. Considering how slow the water pump spins with such a drive, and 5.0 Mustangs used a reverse rotation fan, doubt it would do anything, anyhow. Larry, was this a NHRA Tech official?

Larry Hill · 03-03-2024, 09:45 PM

It was at Indy. Who it was I don’t remember.

02-29-2024, 05:05 PM	#1
Kenney Kelley Member Join Date: Dec 2006 Location: Cocoa Florida Posts: 205 Likes: 178 Liked 72 Times in 36 Posts	cooling fan question Does the electric radiator fan pull air across the radiator from out side of the car or does it push air to the outside of the car thru the radiator? I'm wiring the fans now and i was wondering how to wire them. Thank You Kenney Kelley

02-29-2024, 05:06 PM	#2
Keith 944 VIP Member Join Date: Feb 2006 Location: Dela-where? Posts: 2,193 Likes: 1,160 Liked 1,874 Times in 576 Posts	Re: cooling fan question Pulls through rad. Towards the engine. Or if you have the fan on the other side, push it towards the engine __________________ KEITH MAYERS 2-1/2 X somebody Still many X nobody

03-02-2024, 11:48 AM	#3
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: cooling fan question I've always been under the impression that an electric fan mounted on the "inside" and pulling air from the front into the engine compartment, does a more efficient job of cooling. It depends if you have enough room on the inside of the radiator. But I believe most fans that mount on the radiator simply require the wires to be swapped to change the direction/rotation. __________________ LOCOMOTION Racing

03-03-2024, 08:18 AM	#4
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,629 Likes: 1,919 Liked 10,679 Times in 2,222 Posts	Re: cooling fan question When racing the truck I was told that I had to have a fan. I had a stock water pump with the standard tooth belt and auxiliary 12 volt motor. Tech said go buy a fan and I did and install it. The fan added about 12 OZ to the nose of the truck. It was not any faster or slower with the fan and with the engine being a v6 the blades were so far away they did not generate any air flow across the radiator core. But to race I had to follow instructions. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

03-03-2024, 09:45 PM	#6
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,629 Likes: 1,919 Liked 10,679 Times in 2,222 Posts	Re: cooling fan question It was at Indy. Who it was I don’t remember. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817