A while back i also received correspondence from Geoff in Australia regarding this subject. I'll paste it in here:
George,
I saw your comment about closing the gap between the impeller & the divider plate. I went even further than you did. Using some scraps of stainless steel
exh pipe, I cut strips about 1/4'' wide & the same length as the impeller blade & brazed them onto the back of the blades. I did one blade at a time, & carefully
ground the extension a little bit at a time until the impeller would rotate without touching the plate. I then did the next blade until all 8 were done. Clearance between
blades & plate was 0.030'' at most. What a difference! This pump cools better than the Flow Kooler.
Geoff,
Australia
Pretty innovative, I'd say.
George
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"...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
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