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Site last updated 07/28/2008

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Information

Moment-of-Inertia (MOI) Comparisons*

Lower Moment-of-Inertia (MOI)= faster engine acceleration out of the turns and faster engine deceleration into the turns.

Button Clutch-Flywheel-Assemblies                                            MOI (lb-in²)                 

Sonic 7.25" 2-plate with lightweight flexplate                                 201                           

Quarter Master® 7.25" 2-plate V-Drive® w/ QM flexplate        227                           

 Ram® 6" 3-plate Assault Weapon® with GM flexplate                  207                           

Sonic 5.5" 3-plate with ultra-lightweight flexplate                        153                           

Quarter Master® 5.5" 3-plate V-Drive® with QM flexplate       165                           

Sonic 4.9" 3-plate with ultra-lightweight flexplate                        120                           

Sonic 5.5" 2-plate with ultra-lightweight flexplate                        124                           

Quarter Master® 4.5" 3-plate with QM flexplate                        140                           

Rear-mount Starter Package CFAs                                             MOI(lb-in²)                 

Sonic 5.5" 2-plate with 105-tooth flywheel                                        71                           

Sonic 5.5" 3-plate with 105-tooth flywheel                                        82                           

QM® 5.5" 3-plate w/ 110-tooth cover-mounted ring gear               92                           

* Values taken using the same MOI measuring device.  Includes clutch assembly, disc, flywheel 9ring gear), and clutch bolts. 

Lower MOI enables the engine to accelerate and decelerate faster.