1952-59 Ford Questions About Setup of Curved Blade Puller Type Cooling Fans

I found the illustration below online, and set my fan up, only to find that it wasn't pulling air thru the radiator. Can someone edumacate me? Is the curve of the blades correct, or is the direction of rotation correct? They can't both be correct in relation to the other if the fan is mounted on the back of the radiator, between radiator and engine.

 

If I see the pitch of the blades correctly in the picture, the rotation would be correct to mount on the back side of the radiator. The low side of the blade should lead in the rotation to throw the air to the side of the fan with the guard on it.

 

The puller fan on my car can reverse the rotation by switching the wires. I was double checking the rotation to make sure I had it wired correctly, and just put my hand down there between the engine and fan and got quite a blast, so I guess I had it correct.
I agree with 40cpe......the rotation looks to be correct for the pitch, as he said, if we're looking at it correctly.
Is the fan as you have it wired running CW as shown (looking at it from the engine side)?

 

You should get a feel for which way the fan is blowing by holding your hand on both sides of the radiator. Some fans pull a small amount of amps and aren't up to the task of cooling an engine. 6 volt fans typically aren't as powerful as 12v fans.

 

The fan as pictured is as if you are looking from the engine toward the radiator, and I have it mounted on the back side of the radiator. I reversed the blades to make them curve the way the picture shows them, but if I connect the wires as shown, black to +, blue to -, it blows air toward the radiator which is the wrong direction. I left the blades mounted as pictured, and connected the wires the opposite of what the picture shows ( black -, blue+) and it blows air toward the engine pulling air thru the radiator. as I believe it should. I just want to maximize the fan function because my 302 runs hot, 200 to 220 when the A/C is on, and wants to go higher in stop and go traffic. I'm building a shroud today/tomorrow, and switching to a 18lb cap, and adding a Wix water additive to the 50/50 antifreeze, hoping with correct function of the fan and the other measures, it will run cooler.

 

My 16" fan and shroud.

 

Thanks Jeff, long time no speak. I appreciate the pic, buuuuuut, its' sort of difficult to see how it compares to the illustration I sent, so it doesn't really answer the questions:
1) what is the correct corve of the blades (

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or )?
2) Is the wiring black -, blue+ or opposite

 

I guess you saw this : https://www.motorstate.com/images/InstructionSheets/ALL30070-76_Curved_Blade_Electric_Fans.pdf ,so simple way to know if you have it right if the fan is mounted like mine and you put a piece of paper in front of the radiator it should **** it up against it. If it blows it away reverse the blades per those instructions.

 

Jeff, your shroud is over the fan body? How does your fan attach to the shroud? This might ***ist me in getting a better fan..

 

The answer from Jeff. " so simple way to know if you have it right if the fan is mounted like mine and you put a piece of paper in front of the radiator it should **** it up against it. If it blows it away reverse the blades per those instructions"

 

the arrow on illustration is wrong. that fan wont push or pull air through a radiator or in open space effectively according to the pic

 

Thanks to all for your responses, I have been using the method Jeff mentioned to confirm proper air flow/direction, and I. Will finish the shroud today and make a few test drives to see how well our efforts will be rewarded. I'll update my post when I know more.
Thanks again to ALL
Trikepapa, RonC

 

A followup question, what's a good airtight heat resistant sealant to fill 1/8" - 1/4" gaps between my radiator body and my shroud, not the radiator core?

 

My fan came like this one https://www.ebay.com/itm/16-ELECTRI...110386902?epid=2194024998&hash=item3aee8e00d6 So I used the fasteners that came with it, I did add some 1/2" thick weatherstripping around the fan to prevent denting the radiator fins. The shroud was a bargain find, a place here in Phoenix usually gets about $100 + for a custom aluminum shroud the guy was selling his goods at the Glendale swap meet a customer measured his wrong and it happened to fit my needs perfect I scored it for $10

 

Jeff,
I believe I have the same fan, is yours noisey, mine is. Noisier than I would like.

 

Squire g,
Sorry, I overlooked your response. Your comment is spot on. What I found was exactly as you said. I ended up following the blade configuration, but wired it blue +, black - which reversed the blade direction and pulled air through the radiator, toward the engine. Do you agree that the way I did it will be effective?

 

The shroud will make it quieter but mine is not very noisy anyway.

 

I also have a shroud with 2 10 inch staggered straight blade fans that I might try. Does anyone know which angle/inflection and direction the straght blade typeople should be mounted when used as pullers?

 

Looks like this is a good instructional for the cooling fan challenged, like myself.......

 

Here is the shroud I have on my 55. It came from Old Air products and the fan is a 16" Spal. Fits the aluminum Mustang radiator mentioned in the FAQ's very nicely.