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SN95 Cobras
98 cobra vortech boost ?
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<blockquote data-quote="ZeroDCX" data-source="post: 15586096" data-attributes="member: 91953"><p>When we refer to the damper, we're referring to the crankshaft pulley or harmonic balancer. The stock damper size is 6.5. If you have an oversized damper, it will spin all pulleys and idlers faster with each complete rotation than the stock sized damper. Therefore the blower pulley spins faster and produces more boost without a blower pulley change.</p><p></p><p>From everything that I've read:</p><p>10% Overdrive is approx. 4psi increase</p><p>15% Overdrive is approx. 6psi increase</p><p></p><p>At 5000 RPM you're only spinning that blower 31,145 RPM ... No where near max impeller RPM.</p><p></p><p>Impeller RPM = Crank Pulley Diameter x Step Up Ratio x Engine RPM /</p><p> Supercharger Pulley Diameter</p><p></p><p>Again, are you sure you're just running the regular V2 S-Trim? It seems really strange. I would call Vortech with the serial number and see what they can tell you about the unit.</p></blockquote><p></p>
[QUOTE="ZeroDCX, post: 15586096, member: 91953"] When we refer to the damper, we're referring to the crankshaft pulley or harmonic balancer. The stock damper size is 6.5. If you have an oversized damper, it will spin all pulleys and idlers faster with each complete rotation than the stock sized damper. Therefore the blower pulley spins faster and produces more boost without a blower pulley change. From everything that I've read: 10% Overdrive is approx. 4psi increase 15% Overdrive is approx. 6psi increase At 5000 RPM you're only spinning that blower 31,145 RPM ... No where near max impeller RPM. Impeller RPM = Crank Pulley Diameter x Step Up Ratio x Engine RPM / Supercharger Pulley Diameter Again, are you sure you're just running the regular V2 S-Trim? It seems really strange. I would call Vortech with the serial number and see what they can tell you about the unit. [/QUOTE]
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