ACT flywheels are lighter, stronger and safer than stock cast flywheels
to meet the needs of both enthusiast and hard core racer. Material is
properly distributed for maximum strength, lower inertia, good heat
tolerance and rigidity. One piece construction allows less opportunity
for failure and provides uniform efficient heat transfer from the clutch
disc. No more warped inserts or loose ring gears.
ring gear permits more weight reduction where it matters most and
eliminates the chance of gear breakage or separation from the flywheel.
Precision machined threads will not easily strip out or get damaged like
those found on aluminum flywheels.
ACT engineers XACT
flywheels using the latest CAD and FEA (finite element analysis)
software to evaluate all design alternatives to get the best results
possible. By hot forging chrome-moly steel, each flywheel yields an
ultra fine centralized grain structure that is superior in strength to
any other manufacturing method. Timing marks are precisly located and
clearly displayed (when applicable).
ACT gives extra effort to
strategically slot XACT ProLite flywheels to lower inertia without
sacrificing strength and heat dissipation. ACT heat treats the entire
forging for strength and toughness, and induction hardens their ring
gears for longest gear life. XACT Flywheels are certified as meeting SFI
Specification 1.1. XACT Flywheels are legal for competition in all
racing organizations where SFI certification is required. Ring gears are
cut with lead-in chamfers for better starter engagement and prevention
against rounding off gear teeth.
Engineers at ACT demand tight
tolerances for fit, concentricity and parallelism so that flywheels will
have an exact fit onto the crankshaft, and operate smoothly even at
extremely high rpm.
All flywheels are CNC machined and
dynamically computer balanced for super smooth high RPM reliability.