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Message: <blockquote data-quote="-e f i n i-" data-source="post: 575404" data-attributes="member: 7258">Hmm... may i know if screw type is the best compared to roots and centrifugal?max boost level is affected by the pulley too right? hmm.. but superchargers straight from manufacturers... what makes the max boost vary among other sc units? A/F ratio?so the point is, if we get a super huge pulley, the boost can be set even higher? lets say we get an ordinary SC, if on the paper it says max boost is 20psi, but if we crank it up to 45psi, how big would the efficiency issue be? blower blow up?i read somewhere they recommend using roots and screw for extreme drag/strip, but centrifugal for street/stip...hmmmmmcan we swap the supercharger impeller for a better one? i mean more durable and lightweight + heat resistant? but are there any in the market? how if we port and polish the centrifugal or screw SC units? will the reliability of it be jeopardized? i only know P&P is a common practice among turbo users, but SCs... never heard of it.sorry, gonna do more research tonite and hopefully i dont have to bother youw ith stupid questions again... but i'll have to get some nice sleep first.. been sleeping at 2am for the past 2 days just to cram my subjects lol.</blockquote>

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