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PRO/SPORT Underdrive Kit - Ford 4.6L 3V
PRO/SPORT Underdrive Kit - Ford 4.6L 3V

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Technical Specs
 

PRO/SPORT Under Drive Dampers & Pulley Kits feature :

  • 25% Underdrive
  • SFI Spec. 18.1 Bonded Harmonic Damper
  • High quality ńAll Steelī construction
  • Robust outer ring retention design
  • Spin tested to 12,500 rpm
  • 60° precision engraved timing marks
  • Clear baked paint finish

The PRO/SPORT Under Drive Dampers

Accessory drive systems have been made more compact on Late Model V8 engines like the Ford 4.6L and the GM LS1 by machining serpentine belt grooves on the OD of the crankshaft damper. The crankshaft damper functions as a combination crank damper and crank pulley on these engines. Under drive dampers are smaller in diameter than stock production crank dampers which slows the speed of the accessories and reduces the HP required to drive them. Since performance and racing engine applications generally run at higher RPM, the water pump, alternator and power steering pump speeds can be reduced to save HP and still meet engine cooling, electrical and vehicle steering requirements.

The trick is to reduce the crank damper diameter without losing the torsion control capability required to prevent engine vibration and possible damage. The PRO/SPORT Under Drive dampers have been specially tuned to control crankshaft torsional vibration to stock production levels.

Dynamometer tests of the PRO/SPORT 25% under drive damper on a 2005 Mustang 4.6L 3V engine at Livernois Motorsports in Dearborn Heights, Michigan produced a 13 HP gain over a stock production damper.

1996 - 2007 FORD MUSTANG 4.6L V8 ENGINES

  • Available in Damper only or Damper & Pulley Kit configuration
  • 25% Under Driven Poly-V groove design
  • All Steel Water Pump pulley is finished in black baked enamel
  • Steel Alternator Pulley finished in black baked enamel (where supplied)
  • Kit contains new crank bolt, installation bolt & alternator bracker bolt


For more videos, check out our Coast High Performance/Custom Performance Engines YouTube pages. Click below


Harmonic Balancers > Ford - 4.6L Modular V8
Make > Ford
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