48 replies to this topic

[BIG KEV]

I would think space/room would play a bit part on where you mount them

[Dave6179]

If you have cooling issues, at the rear will be best. Blocking air flow is the worst 'fix'. Have you tried a 160 degree thermostat? I did, went from a 182 unit with better than expected results. Even found some horses.

[Dave6179]

I'm using a Flexolite fan. Loads less drag than std, tried lectric years ago... not worth the effort.

[IMORAL]

Useless at tits on a bull in the front regardless of your combo. Must be at the back or your wasting your time

[IMORAL]

yep I prefer them behind the radiator I used to have a single electric fan but now 2 hi flow ones with a shroud best thing I ever did even on 35+ deg days it doesnt get hot

Must be good fans to keep it cool with one not Plugged in

[IMORAL]

Very nice Tim. Everything looks so clean and new!

[StephenSLR]

Useless at tits on a bull in the front regardless of your combo.

 

Not only do you have to reverse the polarity of the motor to spin the right way but if you didn't flip the fans over so the vanes push the air the right way; then yes it would be useless.

You can mount them in front or behind.

 

s

Edited by StephenSLR, 23 June 2015 - 11:11 AM.

[IMORAL]

They block the air flow even if connected correctly. When driving on the highway with the correct size radiator you shouldn't need the fans on. Yes they will work but they reduce the efficiency of the radiator if they are in front. That being said each to their own. I personally wont run them in front.

[TerrA LX]

Useless at tits on a bull in the front regardless of your combo. Must be at the back or your wasting your time

Just like the A9X factory set up?
Useless?

[StephenSLR]

They block the air flow even if connected correctly.

 

It doesn't work like that, placing something behind the radiator also blocks air flow; air needs to flow freely from in front and behind.

 

I imagine the only advantage of having them behind is if you have a square shroud that covers all four corners; a fan and shroud behind will draw air from the corners more efficiently than if you have the same fan and shroud in front trying to push air to all four corners.

 

s

Edited by StephenSLR, 23 June 2015 - 12:01 PM.

[IMORAL]

ok run them in the front then  I wont be

 

 

It doesn't work like that, placing something behind the radiator also blocks air flow; air needs to flow freely from in front and behind.

 

 

 

Yes agreed. The ones I was referring too have flaps that open while driving to allow air flow through the shroud. They stay closed while stopped allowing the fans to draw the making cfm they are capable of through the radiator.  All I know in my current set up on a car I just purchased is crap and I will guarantee when I fit these to the rear of the radiator I wont have any heating issues.

[StephenSLR]

ok run them in the front then, I wont be

 

I'm not telling anyone how they should run their set up. I have a 16" behind my radiator; it won't fit in front even if I wanted it to.

 

I'm just saying that running one in front is not "useless as tits on a bull". 

 

 

All I know in my current set up on a car I just purchased is crap and I will guarantee when I fit these to the rear of the radiator I wont have any heating issues.

 

If you're having cooling issues there's probably more to it than fan location. 

 

A 16" fan it pulls more cfm than 2 x 14" so you may want to consider a 16". I have one behind a triple core radiator cooling a mildly worked 308 and the needle usually sits around 1/4 or a little past and has never been half way. Of course when I switch off the engine after a long drive then start it up soon after the needle goes to around 3/4 but the fan switches on and cools it down again.

 

s

Edited by StephenSLR, 23 June 2015 - 01:51 PM.

[IMORAL]

Yeah agree. I am going with a twin fan that pulls 2750 cfm. I am aware of the 16" singles.  A mate runs one and its over the 3000cfm mark but setting in up in a shroud with my set up is a bit of a pain due to the radiator size. Current fan is a single thermo in no shroud which is useless. The fans are the issue because it sits on 80deg when on the highway getting the air flow. As soon as I come into some traffic up the temp goes. The single fan I have just isn't up too the task. I think its just a cheap and nasty as there are plenty of singles that pull decent cfm. This isn't in a torana either.

[StephenSLR]

I hear with a shroud you sit the fan 2/3 in the shroud. Some sit the fan half in/half out. You don't sit the fan fully in the shroud as the fan itself reduces the volume within the shroud and obstructs air flow. You want to have that 'cone' of shroud volume in front of the fan.

 

My 16" doesn't have a proper shroud that extends to all corners of the radiator but it does cover most of the core area and the frame that it sits within is closed around the side perimeter which in a way is a bit of a shroud itself. I hear the smaller ones don't have this? I remember seeing a twin set up and they basically had nothing enclosing the fans, just a flimsy frame that they sat on but I guess they worked enough to keep the car cool.

 

s

[EunUCh]

 ....probably the easiest way is fit a gilmer drive pulley to the snout of the crank and run a belt to an intermediate shaft mounted

somewhere on the front rail or splash guard  to poke through the radiator support panel then run another gilmer belt to 

a spindle mounted up front somewhere that holds the the fan...

 

But seriously ...most of the OEM stuff has the thermos. on the engine side of the radiator,there must be a reason for this?

 

The fan will be a restriction no matter what,easy test,grab a fan and push it through the air as fast as you can by hand,there will

be a drag,if mounted on the front the first thing the fan "sees" is whatever air speed is being driven at it because it is first in line and whatever gets through it  then "sees" the radiator?

 

If it is mounted engine side it will "see" what is left of the air speed that has passed through the radiator before reaching the fan and hopefully picked up some heat on the way?

 

 

 

 

 

[StephenSLR]

But seriously ...most of the OEM stuff has the thermos on the engine side of the radiator, there must be a reason for this?

 

Do you have a reference to what percentage of OEM stuff has the thermos on the engine side of the radiator?  I've seen them on both sides and I'd say it comes down to whatever is more convenient in manufacture and assembly.

 

s

[StephenSLR]

 

Push vs. pull is pretty much the same but there is one argument for having the fan behind in pull configuration.

 

It's harder to clean the bugs out of the front of the radiator when you have a fan in front of it.

 

 

s

Edited by StephenSLR, 23 June 2015 - 06:37 PM.

[EunUCh]

No...no % reference on which way who uses what config.  .. just going on what Holden and Ford used over the years that seemed to

work...on a rough scale... VN-VT...engine side

[N/A-PWR]

I did well with this Fan on the fully worked 6:-

 

 

When revving the ring out of the motor, the blades flex straightish   ,

 

coupled with the triple core HQ radiator, no problems. 

80 miles an hour non-stop.

They do crack over Time, so check.

[Ice]

And they go thru bonnets to Dave when they let go