'68 GTX 440HP Over Heating

[1KoolBee]

overheating at hiway speeds is generally a water flow problem. There isn’t a fan in the world that will flow more air than what flows through your radiator at hiway speeds

 

[68gtxman]

Do you really NEED/(or just want) a "high stall" converter? Whats the application? The heat load caused by the torque converter at highway speeds can be as high as 300°+F, depending upon the percentage of slip, the higher slip, the greater the cooler's surface area to dissipate needs to increase. Can the T-C supplier supply you with BTU heat loss at say, 60 mph,so you can size the correct oil cooler, in both Btu/hr. (temperature) AND oil flow volume in Gallons/minutes.....just a thought...the seals and clutch pacs are also being degraded due to hi temps...

Thank you Bob. It is a Mopar performance 2,500 RPM stall speed converter and it had no high temperature problem until it was installed. No, I don’t need it, as the factory one was pretty good already. I am planning on switching it back in, in the future, but right now I have a rod knock that I need to address first.

 

[Mackman]

I have a similar setup to yours, and it ran hot until I installed a Flowcooler water pump which has solved the problem.