Okay.. I have a 1968 high output 327 in a 1966 chevelle Malibu Convt. I put in a vintage AC unit, and a 3 core alluminam radiator. A Mildon high flow water pump and two eletoric fans 1600 cfm each. Fans come on at 180.with a 180 thrmostat. I live in Las Vegas its 110 during the day. The car runs at 210 on the road and 240+ light to light!!! I have moon gages that I think are correct as the fans come on when the gage says 180.... I have flushed the block... But I fear I may have cloged water passages in the heads....any other ideas on what it may be???

Thanks

Your light to light high temps equate to an air flow through the radiator problem. 2 fans flowing 1600 cfm doesn't equate to 3200 cfm through the radiator. How did it run before the the AC was added? Do you also have a tranny cooler as well as the AC core in front of the radiator?

The usual electric fan/AC setup is to have the fans kick on about 10-15 degs above the thermostat rating and when the AC is on the fans are on. I would suggest setting yours up this way will show some improvement.

------------------
...Dennis
The '69 (http://chevelles.com/showroom/ww.jpg) & the '96 (http://www.camaroslimited.com/graphics/memcars/96ss.jpg)
Team Camaro (http://www.camaros.net)
Camaros Limited (http://www.camaroslimited.com)

Thanks Dennis. There is no trany cooler as its a 4 speed. I am putting in a 160 thermostst today. I did not run the car before I put the AC in as when I got the car it needed lots of work the motor ran but It had no gages.

Are you sure that the radiator that you have is aluminum? I do not know of a manufacturer of three plume ALUMINUM radiators? Usually, they only come in large two row versions which are better than 5 row copper/brass.

Go to www.inccn.net/techforum.htm (http://www.inccn.net/techforum.htm) for cooling tips and additional ideas.

Fan companies lie about CFM ratings. How much current are you pulling together/each. What is the attitude of these fans...side by side....back to front...what? Djd has a great point...esp if you are running them back to front. Who makes them, and what is their size. Do they cover the radiator? If they are front to back, one larger one would be much better. Have you looked at the twin Spal units. They are 2700+cfms and are excellent coolers.

Because this setup will not run on the thermostat opening point going down the road, it may have several issues, not just one. Is the carb rich enough?

Changing the thermostat will NOT affect the cooling capacity of the system which you are exceeding for some reason. Thermostats just manage operating points when the system is capable of staying on the thermostat cycling point. Don't waste your time and money.

Just some questions and ideas for you to ponder.

------------------
Steve Jack
-Concept One Pulleys and Brackets
-Engineering & Marketing Technologies
-Northern/Southern Rodder Magazine's "Jack'Stands" technical column author/originator

[This message has been edited by HOTRODSRJ (edited 07-07-2002).]

It my not be a 3 core but it is a aluminum made by Afco racing Radiators. The two fans are both used as puller fans that is what they say is best, sort of side by side one high one low they cover most of the radiator. I went with two as they had more cfm then any one unit. I have a 100 amp alt. to help power then. I have a relay that turns on the fans as soon as the AC is turned on. Without the Ac on fans click on at 180. I will check the carb..

Thanks

Pete

I would still be interested in the amperage draw of both or one of the fans. Who's the manufacturer too. That will tell me loads about the capacity of the fans regardless of claims by the manufacturer.

------------------
Steve Jack
-Concept One Pulleys and Brackets
-Engineering & Marketing Technologies
-Northern/Southern Rodder Magazine's "Jack'Stands" technical column author/originator