View attachment 1715494996 Here is what Chrysler says about pump speed. They want the water pump turning 20% faster than the crank for maximum cooling. I suggest you get as close to that as possible. I’m only 6% overdriven, but I’m working on getting it to 20%.
You have a 6.75 inch water pump pulley. To get to 20% overdriven, you’ll need a crank pulley that is 8.10 in diameter.
At 10% over you’ll need to be just over or at 7.45 inches.
I don’t run a shroud. Your fan is plenty close enough to the radiator you won’t need one if the pump is turning the correct speed.
Fixed my damn math. Sorry for the confusion.
