Buly,
I switched over to double-v pulleys a while back, but that was because I
was having trouble finding the sizes of multi-v pulleys I needed in
order to slow down my water pump and alternators.  I ended up using
double V-belt pulleys off an '89 13B for the eccentric and water pump,
and then used Canton Racing's single V pulleys on each of my dual ND
alternators.  If you need a large (4") multi-V pulley for an ND alternator, I have a
couple that I no longer need after performing the change described
above.  They are modified Honda power steering pulleys.  The
modification consisted of removing the splines from the center hole so
that it will slide over the alternator's armature shaft.  This was done
on a lathe, so the hole is still concentric.

Mark

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bulent Aliev
Sent: Wednesday, May 03, 2006 10:18 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Water pump issues


Today I found my 3 hour old (new) water pump on my Cosmo 13B weeping  coolant. I remembered last time I talked to Bruce Turrentine , he  said that I should replace the stock Cosmo pump with one from another  model engine, but I can not remember which? You 3 rotor guys may know  which pump he was talking about?
Another thing: I still have the original serpentine belt pulleys and  wander if it is a good idea to switch to a double V-belt setup.
And source for all the pulleys. Looks like my single serpentine belt  was slipping at high RPM
Buly
http://tinyurl.com/dcy36




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