Ok I will try to give all details so that someone out there will be able to see what I am missing.
The subject is a 68 Camaro with a 71 402 Big Block .030 over. very mild engine.
Car ran great. Had a small block radiator with no shroud but ran 180 in traffic no issues. It went through a mild "restoration" where the roof was replaced and car was painted. I added Vintage air along with a factory replacement new big block radiator with shroud. It now runs hot. 190...then up and up to 220 and I believe it would go further but I have been able to get it out of traffic by that time. It runs hot with the air off, and with it on. It runs ok at speeds of 35 to 50 but the minute you stop it starts to go up. It also gets hot if you are running 70 or above.
Here is what I have done.
2nd new theromstat this time 160 deg
New 600.00 alum radiator ( This one is much bigger that the Big Block and 3 tyimes the size of the small block one)
new temg gage ..just to see if it was reading wrong
Tested by cranking engine with radiator cap off to see when thermostst opened up and if water was flowing. You can see the flow in the radiator.
New radiator cap
New overflow tank
remember this is a car that ran cool with the wrong radiator and no shroud. It now runs hot even if I remove the belt from the AC. No chance to run AC unless you are driving the 35 to 50 speed with no stops.
I have added an electric pusher fan to the front side of the AC coil just as Vintage Air told me to do. I have made a air shield between the radiator and the core support so that all air must go through the radiator.
I am runnung a 18" 6 blade mechanical fan with no clutch because the long waterpump of the 71 model engine in a car that had a short pump will not allow for the clutch.
The fan is a high flow stainless unit.
As you can see I have spent many hours and dollars to get to this point. I am ready for your ideas and hope that someone here will see what it is that I have missed.
THANK YOU IN ADVANCE FOR ANY HELP. As you can tell, I have no more ideas. You can contact me direct at [email protected]
or respond here.