Andrews Products Gear-Driven 21HG/G Grind Cam

Andrews Products Gear-Driven 21HG/G Grind Cam

Andrews Products grinds its cams with the help of a computer with cam design capabilities. This superior technology gives the utmost in both performance and reliability. Only the best alloy steel billets and heat-treating processes are utilized. Furthermore, the power in Harley’s Twin Cam engine can be made even more convincing when superior Andrews computer-designed high-performance cams are installed.

• Bolt-in cam for more torque with stock compression
• Run best with low-restriction exhausts (1700-5200 rpm)
• Similar to the EV-23 cam
• Cams work well with fuel injection or carburetor models
• Can be used with stock valve springs and tappets
• Works well with carbs or fuel injection

Intake:
Open: 10 degrees
Close: 30 degrees
Duration at .053: 220 degrees
Duration at .020 valve lift: .255 degrees
Valve lift: .498
Lift at TDC: .138

Exhaust:
Open: 40 degrees
Close: 08 degrees
Duration at .053: 228 degrees
Duration at .020 valve lift: .264
Valve lift: .498
Lift at TDC: .120


**Note:

• All Andrews gear-driven cams require four-gear set for installation
• Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance
• 59G, 60G and 64G cams are for highly tuned engines and require the knowledge of an expert engine builder for proper setup and installation