Dual Mass vs. Single Mass Flywheels, Advantages/Disadvantages??????????

[Paul Workman]

Originally Posted by alnukem

Paul, I tried studying on flywheel weight before....I thought I came up with the HP was mainly due to the way a dyno measures & not a "true" number, as if you had heavy wheels on your car & it dynos less with no difference in the engine. I do realize if you drop off weight it will accelerate faster.

You are correct. "Effective power": During acceleration, energy transfers to the mass of the drivetrain, and that left over goes to the wheels. By reducing the drivetrain mass, e.g., a lighter weight flywheel, the effective result is as tho the engine had more power. Actual crankshaft output, or "true" horsepower is not changed. Using a Fidanza flywheel will not increase power at the crank, or when pulling a load at a steady pace. Only when rpm is accelerating (or decelerating) will the effects of a massive flywheel be a factor.