Tom66
Member
I have a 1966, 4 speed roadster with a 1975 454 block set up as a 427 with 1967 L88 heads. When I bought the car a few years ago it did not have A/C. Due to the very hot CA summers I decided to install a Vintage A/C system. The car is now running very hot, especially in slow traffic. I can hit the yellow warning line on the heat gauge, no problem. One school of thought is the water pump pulley should be smaller in diameter which will make the fan spin faster. The WP pulley is now 7-1/4". Did Corvette use small pulley's for A/C equipped cars? If so does anyone know what the diameter is and possibly the part number? If not does anyone have any idea's, other than installing an auxiliary electric fan, to make this engine run cooler. I have installed a racing high capacity water pump; not much help. It already has a 7 blade fan, but not sure if it is aggressive enough or not. It has been suggested to check the fan clutch, but I am sure that is working ok. Also to check the seals around the radiator core, work in progress. Thoughts? Thanks