Re: 29 radiator core

Posted by DavidM On 2010/10/22 23:48:54

That wasn't intended to be controversial! The car with the new core has just returned from its first run a 3,400 tour which was mostly in mild weather. It has a very effective radiator shutter thermostat and an inline thermostat. On the cold mornings it ran at 140 deg F. On the few occasions when the ambient was around 80 F and we were climbing a steep hill it still ran at about 140 F. This is not an assumption it is measured with rebuilt a recalibrated temperature gauge in the cylinder head and touching the head confirmed that it was running too cool. Also the engine is probably not fully run in from a complete overhaul.
Both of the other cars would have boiled under the same conditions.
OK so I need to drive it hard on a long hill when it is 100 ambient and I have no doubt it will go above 140 but the point I am trying to make is that a new modern core is so much better than a honeycomb core that I would not contemplate anything else and if funds permitted I would put modern cores in the other 2 cars.
The in line thermostat will now be set to open at about 170 F.