Belt Tension Calculator for Gates Krikit Belt Tensioners: https://www.gates.com/us/en/resources/calculators/belt-tension-calculator
General Formula for calculating speed on most supercharger installations with the supercharger driven from the crankpulley. If you have a Jackshaft, you may have to calculate the pulley ratio, then multiply at the end: Calculator: (Crankpulley / Supercharger pulley) x maximum engine RPM x step-up ratio <or = Y
Maximum Blower Speeds:
Vortech:
V9 Step-up ratio: 3.45 Maximum RPM 52,000
Eaton:
M45/MP45/M62/MP62/M90/MP90/M112/MP112/M122/MP122: Short shaft rotors are limited to 14,250 rpm (closed ended bearings). Long shaft rotors are limited to 18,000 rpm (open ended bearings).
Eaton does not use teflon on the rotors. They use epoxy coating. JBP uses a ceramic. It doesn’t chip or flake like epoxy and is resilient to sprays such as methanol and fuel.
You cannot bore out a twin screw or roots supercharger by putting larger rotors in it. They are either longer, or much wider than the case. Yes, I know someone tried to adapt M122 to M112, but the discharge was still in the M112 position and the rotor mass increased while power output was disappointing compared to other M122 models. Wasted resources. You would be better off adapting a larger supercharger all together.
The company on the internet, bragging that they put M112 rotors in a 2300AX Lysholm and made more power may not have passed 2nd grade math. The M112 is a 1.8L and the 2300AX is a 2.3L. It doesn’t add up.
You cannot convert a CW centrifugal to a CCW centrifugal. To convert a supercharger, you would need gears, impeller and volute. The gears are angled different- AND if you have have straight cut gears, the threaded nut has threads in the opposite direction.
Caution: URD Supercharger pulley issue with TRD/Magnuson 3.4L Superchargers: https://www.facebook.com/plugins/video.php?height=476&href=https%3A%2F%2Fwww.facebook.com%2FJonBondPerformance%2Fvideos%2F317577970047876%2F&show_text=true&width=267&t=0