To solve an overheating problem with my 58 MGA with a .030 over rebuild and compression upgrade to 9.8 - 1, I installed a recored radiator with about 20% more cooling capacity and the 16 row oil cooler. The engine now runs around 185 - 190 deg on the open road with the temperature going up to maybe 200 - 210 on longer hill pulls. In order to make the thermostat more effective and regulate the temperature better, I think to use the 20% more capacity in the radiator the water pump needs to turn about 20% faster also. That way more cooler fluid from the radiator will be circulating throught the engine and the thermostat will be more effectively used to stop down, or open up, to help the temperature stay at a steady reading. In other words, with more cooling capacity in the radiator, wouldn't it be more effective if the water pump turned faster to better use the extra capacity? If this theory is all true, and I am not sure it is, the question now: Does anyone know of a water pump pully that will fit the MGA engine that is smaller in diameter, to turn the pump 20% faster. I have not seen any catalogs, including Moss, that even list water pump pulleys for sale, so maybe one will have to be fabricated by a machine shot to work. For racing purposes everyone wants to slow the pump down with larger pulleys, so maybe none are available. Any help would be appreciated.
Dar