Contour Enthusiasts Group Archives Forums General Troubleshooting Metal Water Pump Impeller A Good Idea? Maybe Not?

GS wrote:

"Did extensive research and found that plastic is the only material that could be molded to
produce an efficient design for water flow. The metal impellar is a lot more shallow than the
plastic, and some resources have stated that correct flow in the head is not
achieved(prone to hot spots).
Many manufacturers have been making plastic impellars in their effort to make things
smaller and more efficient."

This is exactly the type of thing I am concerned about...that there could well be a reason that
they didn't use a metal impeller, & switching to one could lead to improper cooling, something
we definitely don't want.

Thanks everyone for your input! Hoping to read more opinions on this.