I've got a few words on that subject: I don't have a stamped impeller, but I do know that pump efficiency is directly related to the clearance between the divider plate and the vanes. If your clearance, (regardless of cast or stamped) is more than say, .060", YOU ARE THROWING AWAY COOLING EFFICIENCY. I tweaked mine from about .250" down to about .100" and it made a drastic change in my engine temps with no other changes.
You can spend money on big radiators, electric fans, magic cooling fluid, yadda,yadda, but if you are running a large clearance all the other stuff is a band aid. Do the clearnace thing first, then go from there. Cost is a few bucks for a gasket.
Not only that, hot start problems went away too...a possible side benefit.
George
__________________
"...out to my ol'55, I pulled away slowly, feeling so holy, god knows i was feeling alive"....written by Tom Wait from the Eagles' Live From The Forum
|