I probably missed the mark with my previous post.
I did some searching and found this quote in some literature for a dynamometer.." using a toroid water brake absorber. Loads most high performance engines at any throttle setting or RPM you need to test at - indefinitely! (Requires minimum of 5 g.p.m. @ 30+ p.s.i. for every 100 continuous Hp" ...
So I ain't qualified to correctly answer your question. Cut and paste this link into your browser and if it don't help ya post a question on that board and those guys will get your answer.

http://www.wmi.org/sql_messages_html...ni&num=28508#5