2.38" 11 Rib LS9 10 Bolt Pulley

Product Details

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C6 ZR1 LS9 2.35 11 Rib 10 Bolt Pulley to be used with ZR1 Supercharger snout or supercharger front cover.

10 Bolt Supercharger Pulley Choices stock balancer
2.60 inch - 19% OD - 18,300 RPM supercharger speed*
2.35 inch - 32% OD - 20,300 RPM supercharger speed*

10 Bolt Supercharger Pulley Choices overdrive balancer
2.60 inch - 36% OD - 20,800 RPM supercharger speed*
2.35 inch - 50% OD - 23,000 RPM supercharger speed*

*Measured at 6,500 RPM engine speed / Stock supercharger speed 15,400 RPM

Supercharger Pulley	Belt Description	Part number/ belt / idler
2.60 diameter	Stock belt	100 mm idler L250130309
2.35 diameter	82.5 inch 11 rib belt	76 mm idler   L250120309

With Lingenfelter 14% Overdrive Harmonic Balancer
Supercharger Pulley	Belt Description	Part number/ belt / idler
2.60 diameter	2160 mm 11 rib belt	11PK2160 / 90 mm
2.35 diameter	Stock belt	76 mm idler   L250120309
Factory belt specs	2137 mm 11 rib belt	12627521 / 90 mm idler

Pulley diameters are measured with a 2.5 mm check ball. If measuring the pulley diameter directly with a caliper the diameters will be closer to 2.60 inches and 2.35 inches. The 2.38 inch pulley when combined with our 14% overdrive damper will result in a supercharger speed 23,000 RPM at 6,500 RPM engine speed. Based on LPE testing we do not recommend exceeding 23,000 RPM on the LS9 supercharger.

Modifications listed on this page will requires recalibration of the factory ECM.

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