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Old 08-26-2016, 09:24 AM   #13
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Join Date: Jun 2010
Location: San Antonio, Texas
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Default Re: Carb Riser Questions

Rejetting is only valuable if it needs to be changed for a reason. The best reason would be moving from say the coastal or valley regions of California to the mountain regions of Colorado. That would be a good change in altitude that would affect jetting/fuel air ratio. Too rich means poor fuel economy and the power would suffer even more. Changes in carburetion should accompany changes in bore size/stroke, compretion ratio, and cam/valve function (hopping up). Dual carbs would likely have to be rejetted small for a stocker. Less so for a thumper hot rod mill.
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