Originally Posted by waldig
First and foremost, the Johnson pump in a SRT MINE with the LET heat exchanger runs about 3.5 to 3.7 GPM.. forum. My measurements are for a 55% internally -motor and radiator. 
Woody, I don't want to question your knowledge. But here are the spec's of the Johnson Pumps. I don't get where you are getting 3.5 to 3.7 GPM. And I believe most people are running the 10-24504-03 CM30P7-1.
