Rear Mount Rad.

Hey all,

Just can't get the grill shell low enough to meet the cowl line, so I am kicken' the rad to the rear. I am thinking copper, but would consider other options as well. What are the big bumps and concerns when piping? I'm running a 65 Mustang radiator, and during mock up (rad in front) had no issue with 45 minutes at idle with a electric fan (Ford Taurus 2300 fan).

Couple thoughts/questions: the long pipes/tubing to the rear, will hold more water, be exposed to the moving air (bare heated pipes open to environment); shouldn't these lengths lend more volume for cooling capacity?

Are there different supply return sizes or are they both okay the same?
I ***ume, like a boiler, you need an air purge?

What is the skinny on the angle of the rad? Is it true a 45 degree is better?

Thanking each for answers before hand, I want to say that I love this site. I have never been failed for great, artistic, insulting, praising, comedic, sarcastic, brilliant, idiotic and down-right-insane responses.

The Pork

 

I tried this on a dirt car years ago. Becareful with your plumbing so as not to have air locks in the system. If pulling air from under the car, keep in mind that the air is preheated. We tested ? the car quite a bit around the shop but when we put it on the track the car that wouldn't overheat, boiled over. Not saying it won't work, just saying idling in the shop for extended periods doesn't mean you have the real world solution yet.

 

Been many threads over the years here. Try searching for "rear mounted radiator"

 

This is very true. I tried the rear radiator thing too. I couldn't get enough air going down the road and my truck would start to over heat. When I stopped at a light it would start cooling off.

I had the same idea as you with the added volume of the lines helping cool. I even ran 2 radiators in my bed and without good airflow. It'll overheat at cruising speeds

I was going to make some sort of scoops to grab the air on mine. I never got around to it and just put the front one back in plus the 2 in the bed. I never have to worry about overheating now. 😀

As far as lines to the rear I just used 1-5/8 DOM tubing welded right into my ch***is. You could use copper but IMO would just be added cost.

As far as bleeding the system. I run 2 caps. That way you can fill the lower one up until its full close it off. Then fill the higher one. It works perfect for me. Some people will say you can't run run caps but you can.

I can post up some pics if you want just let me know.


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