Re: 66/68 TI Distributor, Overheating, Carbureatio
John----
Just a comment regarding the "Flowcooler" water pump. The primary benefit of the "Flowcooler" design is the water pump impeller. The water pump impeller used on most late model water pumps or even many rebuilds is a stamped steel design. I believe that the "Flowcooler" adds a steel plate rivetted to the back of the impeller to greatly increase pumping efficiency. This plate is sold seperately by some and can be added to a stock-type pump with the stamped steel impeller to increase efficiency.
However, early-style Corvette water pumps used a more efficient cast iron impeller which doesn't need the plate; it already incorporates the features of the plate in its normal design. I greatly prefer the cast iron impeller. The small block pump cast iron impeller, GM #3923250, used to be available through GM parts but has been discontinued for years. I don't believe that the big block cast impeller was ever available as a service part.
John----
Just a comment regarding the "Flowcooler" water pump. The primary benefit of the "Flowcooler" design is the water pump impeller. The water pump impeller used on most late model water pumps or even many rebuilds is a stamped steel design. I believe that the "Flowcooler" adds a steel plate rivetted to the back of the impeller to greatly increase pumping efficiency. This plate is sold seperately by some and can be added to a stock-type pump with the stamped steel impeller to increase efficiency.
However, early-style Corvette water pumps used a more efficient cast iron impeller which doesn't need the plate; it already incorporates the features of the plate in its normal design. I greatly prefer the cast iron impeller. The small block pump cast iron impeller, GM #3923250, used to be available through GM parts but has been discontinued for years. I don't believe that the big block cast impeller was ever available as a service part.
Comment