Blueprint 408 cooling system questions.

yellow rose said

Neither of the two pumps pictured are high flow pumps.

If you are going to underdrive the water pump (bad idea) then you need 8 find. If you are going to overdrive the pump (the right way to do it) you can use 6 fins.

The number of fins is less important when the pup speed is correct and the fins are closed off with a plate OR you mill the timing cover until the fins just touch the cover and then use the gasket to set the clearance between the fins and the cover.

Click to expand...

Not so fast.
Not sure where underdriving the water pump came up ?
That wasn't where I was going with this.

The 6 vane pump is actually an AC pump, which uses a smaller AC pulley.
The 8 vane pump is a Non-AC pump, which uses a bigger Non-AC pulley.
The problem is running an AC 6 vane water pump, on a
Non-AC car. Parts suppliers sell them all the time, and unsuspecting people just bolt them on. Less flow and hotter temps will result from doing this.
That's why I brought this question up.
What pump is on the motor ?
Maybe BP didn't supply the WP ?