I have a 58 dizzy with pertronix. The car starts right off, it excelerates quickly and it runs great at any speed so I would think everything is adjusted ok. The only thing when it reads hot is when I have to stop, I have to keep my foot on the gas or it chugs bad, once I take off it's a sweet y-block again.....and thats only when it's hot. I just think with the heater dropping it 15 degrees their must be something little missing. As far as the radiator, it doesn't look like its ever been repaired. Gary

       

Gary, 55 Vicky, St. Germain, Wisconsin

 

Did you ever see copper or brass that has been exposed to moisture for a period of time?  It gets a coating of green corrosion that is very tough.  If the insides of radiator tubes get this coating, water may still flow through them fine, but the corrosion acts as an insulator and prevents proper heat transfer from the water to the air.  You may be in for a recore of the radiator.

John - "The Hoosier Hurricane"

Because turning on the heater helps in reducing the engine temperature, the radiator itself is highly suspect.  I’ll also suggest putting a timing light to the engine and insuring that both distributor advance curves (mechanical and vacuum) are working properly.  Boiling any water out?

Lorena, Texas (South of Waco)

It's never boiled any water out, 13 lb cap.

       

Gary, 55 Vicky, St. Germain, Wisconsin