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    1. #3
      Join Date
      Jun 2010
      Location
      Oxnard,CA
      Posts
      56
      Country Flag: United States
      First, you have to figure the ratio at which the idler pulley will spin. To do this divide the circumference of the crank pulley by the idler pulley. Then, do the same with the add on drive pulley and the vacuum pump pulley.

      Chris Lansford

      69 Nova that's never done





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