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Message: <blockquote data-quote="-e f i n i-" data-source="post: 693631" data-attributes="member: 7258"><p>Sorry to bring up old topic again, but theres just something that i want to confirm.</p><p>In order for a centrifugal to pump efficiently, it has to spin very very fast and that is why step up gearboxes are for right? Do roots use step up gearboxes too?</p><p>But why do centrifugals have to rev up high to pump efficiently? do roots have to do so too?</p><p>and if your centrigual s/c unit supports up to 110000 rpm as stated earlier, tht means your s/c can still pump air at 10,000 rpm engine speed and wont have to worry bout your s/c overspeeding and getting choked where the air enters the speed of sound and stops moving? </p><p>are reversions are bad thing for supercharged engines?</p><p>are high cams lucrative on supercharged engines? i just know it isnt for turbocharged ones.</p></blockquote><p></p>

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