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Rotrex pulley change

Supercharger kits are usually listed with different sizes of pulley and alot of times the really small sizes are for when you are running smaller crank pullies(especially on murican cars

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Old 08-02-2014, 11:19 PM   #15 (permalink)
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Supercharger kits are usually listed with different sizes of pulley and alot of times the really small sizes are for when you are running smaller crank pullies(especially on murican cars because there are many different options for crank pullies) some of the small sizes when run with a larger crank pulley can overspeed chargers. you would want to look at the redline on the charger and then figure crank pulley diameter/blower pulley diameter x crank rpm to figure out how fast the charger will be spun. sometimes this means you need to also calculate the step up n the chargers gearing when it's max rpm is listed at the impeller not input pulley
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