My Spit is fitted with a full width rad (recently reconned), side air deflectors, and a good quality pull electric fan which comes in at the point where the needle passes the rh level on the meter. A new 74 degree thermostat is fitted. Still she runs with the needle on the high side in motion.
With the engine hot and the needle indicating high I have let the engine idle and monitored the result, which is that the air coming through the fan is relatively cool, the bottom of the rad is a little hotter but the top of the rad is hot and the fan is constantly engaged but seems to have only a very slow effect on the needle.
My logic is pointing me to the water pump but any other suggestions would be appreciated please. Thanks in advance, Mike.