Posted for "Ed Anderson" <eanderson@carolina.rr.com>:

       I just reviewed the spec on the pump and Davies Craig claims 20 - 80 l/m. So I guess in this system I'm within those specs. I was surprised that I didn't have a higher flowrate with no evap cores in the system. I was really surprised that the GM cores had a lower flow rate than the Ford cores as I had been warned that they would not provide sufficient flow. This is a pleasant surprise as I found that the Ford cores were easier to find, easier to remove from the plenum, easier aluminum to weld on and far easier to mount. Hopefully they will also work better.

   Great work Todd.  Do you know what year the Ford and GM cores were (approx?).  Your results on the Ford and GM cores are the direct opposite according to the Contact! article on those two cores.  So, yes, I am surprised at the results.  It would be interesting to compare the internals of those two types of cores.  I've been warning folks of the reported unsuitability of Ford cores based on the Contact! article and it appears, based on your tests, that the warning has been erroneous.     Getting that much flow with that low a current draw is another fact that is contrary to "conventional" wisdom of how much power a water pump consumes.  So lots of good information here.  Leon are you listening?

   So thanks a bunch for sharing your findings, Todd.  That's the sort of thing that helps us all out.  Now, I wonder if I could swap my GM cores for Ford cores in time for Sun & Fun? Hummmm.

   Ed Anderson