That should cool her down.

MustangSteve wrote:

Nice work.  How is this one attached to the radiator frame?

It is bolted to the top and bottom core support. 

Is there any space between the shroud and the cooling fins?,  There should be at leasst an inch or so for the fans to able to draw air from the entire rad. not just where the fan locations are.

Rudi wrote:

Is there any space between the shroud and the cooling fins?,  There should be at leasst an inch or so for the fans to able to draw air from the entire rad. not just where the fan locations are.

There is 5/8". I would have liked a full 1" but there wasn't room. If I had had more room I would have made a Fiberglas shroud that contoured to improve airflow.  As it is even with only 5/8 I was still getting good airflow through the entire radiator and the 5/8" is way better than what I had before with both fans mounted directly to the core. 

McStang wrote:

Looks good Daze. What fans are you using? Controller?

i got them off eBay. They are 2500 CFM each and are 14".  As a controller I have a thermal switch, a relay, back spark diode, an over ride switch and a bunch of wire. 
 

Hornman wrote:

 That radiator is Ginormous!!! What the heck does it go in?

It is living in my 62 Galaxie currently however it is even wider that the radiator designed for the old Gal.  This unit came out of an 83 Grand Marques.  when I originally dropped in the 302 the Marques was the donor car and there were issues with the Galaxie radiator so I worked with what I had.  Later when I went to aluminum I found a place that made replacement aluminum radiators for an early 80 Marques. 
 

McStang wrote:

So what's a 'back spark diode' and where does it go in the line? What are you using for the thermal switch?

 

"Since the motor is an inductive load and an inductor is an energy storage device, when the contacts of the relay open, the energy that is stored in the motor has no place to go.  The voltage increases (negatively) and a spark is created across the relay contacts, greatly reducing the contact service life.  If a diode is placed (reverse biased) across the motor, it will not conduct in normal operation but will conduct when the relay contacts are opened, thereby supressing the spark. The current is said to "freewheel" through the diode and the motor after the supply current from the battery is interrupted.  This voltage spike can get unbelievably high, hundreds of volts for a 12V system.  Use a 1N5404 which is rated at 3A, 400PIV."

I got the thermal switch from summit racing.  it mounts to the intake and gets the temp directly from the coolant in the intake.


 

That is exactly why some relays come with a built in diode.  That reverse spark will shorten the lif of the relay.  I don't think it would be as critical a need on a fuel pump but I can still see the advantage of putting one on.