> > FWIW -- not all stock pumps are created equal. I have seen
> (and used)
> > some where the vanes are much shallower than were on the original
> > pumps and the repros seemed likely to move less coolant.
Here are some shots of what I believe to be an original pump with the brass
4 blade impeller; an aftermarket "stock" pump with a cast iron 4 blade
impeller (which BTW worked fine for many years in my "now wrecked" TR3A);
and a "high performance" pump with a 6 blade impeller (bought from BFE many
years ago):
http://tinyurl.com/38hwfxq
Randall
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