Ed Klepeis wrote:

Dear Paul
      I am having a flat belt pulley made up for the 2.5L subaru  it is 4 3/4 lbs lighter than a stock one and smaller in dia. that the stock one to slow the alt down. Being that the rotary turns
higher rpm's than the subaru in operation how much smaller in dia. would you est. the pulleys would have to be from the stock ones. I am looking into making up a whole system to fit the rotary
crank,water pump, alt. on one flat belt with a tensioner whats your take on this idea. I will be bring the subaru alum pulley down to sun n fun to give everyone an idea of what I am talking about
and to listen to suggestions.
                                                                                                                                                               Regards
                                                                                                                                                              Ed Klepeis
                                                                                                                                          techwelding@comcast.net

I don't know because I don't have a stock pulley here. Most people are moving
the alternator over to the side so that acts as a belt tensioner.
RB and Mazdatrix already sell smaller pulleys.

Paul Lamar
 
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