Also FWIW the Mazda factory manual states that the alternator puts out its
 max rated capacity at under 6000 rpm. Seems useless to turn it any faster than
 necessary.
    Kelly Troyer

--
Dyke Delta/13B Rotary Power



> Posted for "3 rotor" <rv8r300@attbi.com>:
>
> FWIW -on my RV my nippondenso alternator runs at about 10,000 rpm at cruise.
> It has done so for over 800 hours now, no problems. I do have a blast tube
> on it.  Kevin
>
>
> >  Jim, I use the Racing Beat Main pulley which is suppose to reduce my
> > alternator and water pump  rpm by 20% over stock.  Then I also have the
> > Racing Beat Alternator Pulley which is suppose to reduce the alternator
> rpm
> > by 20%.