any one here have over heating problems, if so what are some ways i can fix this, ive thought about dual electric fans and a 4 core radiator will this help? thanks

 

That sounds like a good idea, the dual electric fans will also free up horsepower. You don't need more than a 3 row radiator. You might also want to consider a lower temperature thermostat and a higher flow water pump. If these solutions don't solve your problem then you have a far worse problem, it could be a simple blockage or it could be a blown head gasket, a warped or cracked head or block.

 

My first '67 R/T used to have overheating problems. I had the radiator redone with a 4-row core, and never had another problem after that. As 71RR said though, there are a lot of potential variables, and that was just my personal experience. Keep us posted on any developments.

 

thanks, i dont think its with the head or block, it only has about 5000 miles on rebuild, one thing tho, where the radiator hose connects to the block there is always alittle antifreeze that tends to want to drip out so im thinking i have to replace the gasket in that area, also i just replaced my old carb. with a holley dual pumper 750 which took care of my vaporlocking problem and i like it alot more, but i think i need to take it in and have it tuned because it seems to flood pretty easy at higher speeds ( not that ive gone that fast ) but it tends to practicly just shut off and i have to give it steady throttle and it will come back to life so thats another thing i have to mess with. i know i hope my started doesnt ever go out again cause that was a pain in the rear to replace, i had ordered i hi-preformance started, tried putting it in and found out it didnt fit with my header so i had to go back to the origional. its just a fun little project i want to learn on and keep for myself for as long as i can. in the future i hope to have it in perfact running order
charles

 

The engine has been rebuilt, how much was it bored? This too can and will cause an engine to run hotter and the more it's bored the hotter it will run.

 

I have faced both your overheating problem and the fuel cut-off at "high-speed". I have a 69-440-4v out of a GTX in my Challenger. It seems to be unique because both inlet and outlet are on the passenger side of the radiator. I don't think it fully utilizes the radiator and kept overheating. I flushed the system and installed a new T-stat and coolant with "Water Wetter". It did the trick.

For me, the high-speed cut-off with the Holley DB wasn't flooding but fuel starvation. Since my car was originally a 340 with a 750 Thermoquad, I thought the original fuel line was sufficient. The 440 with the 750 DB drained the stock line dry within just a few seconds of 2nd gear. I upgraded to the larger diameter line and haven't had any more cutting-out at WTO.

 

Yeah, the BB's have larger fuel lines. Not only that, but the RB engines (440, 413, 426)have an even larger fuel line than the other BB's (383, 400).

 

You may also want to check your timing.

Brian

 

As brain said check your timing. Retarded timing will cause overheating.Also I have always found I had a lean condition when the engine stombled at higher rpm. A lean carb will also cause overheating.

 

Yep, a little too much fuel is better than too little.