I just dropped my engine at the builders for a tear down. It has unknown internal problems, they are going to call me tomorrow with a diagnosis. The reason for the teardown which is unknown makes no difference to me. I have a 20.5 Carrera open bow with a stock 12JG pump with a A aluminum impeller, ride plate and place diverter. My question: How many horses can I put through the pump without having to spend any money on it. Where is the happy medium so to speak. If you want to know what speeds I am looking for I would like to get into the mid 60's if budget permits. Based on the initial conversation with the builder I can afford 500 horsepower @8.5:1 compression.
Please enlighten me.