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« on: May 10, 2018, 07:43:14 PM »
I have the exact same radiator on my Enderle hat injected 421 sbc altered. I agree with the other posters, you most likely have air pockets. When I fill my radiator, I actually raise the rear of the car up about a foot to help it purge the air out of the system while I run the electric water pump. Then after a while I let it down and keep running the pump. All told, I usually run the pump about 20-30 minutes to get all the air out. Even then, after the first time at the track after several heat cycles, and after it has cooled completely down overnite, I have to add a small amount so that the water level is about 1-2 inches below the radiator cap. This radiator works well for me in my altered which I bracket race and drive from pits to track and back to pits. Only thing that I don't like about it is I have not figured a way to convert from a rubber radiator hose to braided hose. But hey, rubber hoses work for thousands and thousands of miles in street cars don't they?