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Message: <blockquote data-quote="synchron" data-source="post: 575470" data-attributes="member: 115">Screw s/c is a better and more advance version of roots charger. It can produce much faster and more boost.If the s/c is rated at 20 psi and you want to make 45 psi then most the first thing that goes first is the bearing and gear inside the chargers. You will need to spin at a greater speed in order to get this type of boost.For example if the screw charger max RPM is 18000 and it will produce max 20 psi. If you want 45 psi then you need to spin the s/c more than 18000 RPM. The parts inside the charger may only last max up to 18000-20000 rpm. After that everything will start to tear apart.Yes! you are partly correct on the usage of s/c. It is all depends on your engine built up. For engine which is less 2.5 litter and has high rpm, it will favour to use centrifugal supercharger. The engine is light weight and it will easily spool up the charger.What do you want to do with your car actually?? street, drag, circuit or what?? What type of hp are you looking for? What is your budget?Never tried swapping impeller or even pnp a s/c before. No info on it.</blockquote>

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