I seem to have missed a lot of posts.  When I'm going to be out of town
for more than couple of days I stop the list.  That could explain some
of it.  12 GPM and 34 GPM is a pretty wide window of stuff that
apparently works.  34 is like cycling your whole coolant supply through
the system every 4 seconds or so.  That just seems really really fast to
me.  It was 40+ years ago last time I studied this stuff, so all I've
got is intuitive guesses.
Which is, of course, exactly what I keep complaining about :o) ... Jim S.

Jim, I agree that 12-34 GPM is a big window. One of the items that always drove my skecptisim over the EWP is that in almost every thermodynamic text I've read turbulent flow is cited as helpful to heat transfer. This would be short of cavitation of course.  Volume is always the second item, or sometimes interchangeable. I'm sure this is what drives the "other list's" refusal to believe the EWP will work. I AM willing to accept a actual test. Thanks Todd Leon and whoever has tried. Somewhere there is an incorrect assumption being made. I'd like to know where, so I'd be more comfortable, but I am always willing to believe my eyes, and my temperature guage! As a side item, when I spoke with Steve Wienzerl the designer of the newer PowerSport reduction drive, he said they tested the EDWP to max flow. The claimed volume was 55 GPM somewhere between 6500 and 7000 RPM. He was sure this was on the ragged edge of caviitation. He wasn't a EWP believer, in fact he wanted even more flow than they were getting!

Bill Jepson