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Return to Parts List HUG HEH1523BL HYDRAULIC CAMSHAFT 112º LSA+3 FLAT TAPPET HYDRAULIC / ONE BOLT TIMING GEAR $160.00 Flat Tappet Hydraulic / One Bolt Timing Gear. Light car, mild street: medium to heavy towing or RV. Dual exhaust or headers, 4 bbl carb. Street gearing 3.00 to 3.55:1. 150psi suggested cylinder pressure. Good idle, resto/cruiser. Hot daily driver, mileage OK.  Camshaft Technical Details Intake Valve Lift 1.5 Exhaust Valve Lift 1.5 .470" .506" Intake Valve Lift 1.6 Exhaust Valve Lift 1.6 .501" .539" Intake Duration at .050" Exhaust Duration at .050" 215° 223° Lobe Separation Angle 112º Intake Opening at .050" Exhaust Opening at .050" -1.5° BTC 46.5° BBC Intake Closing at .050" Exhaust Closing at .050" 36.5° ABC -3.5° ATC Min. Suggested Cylinder PSI 155 Sweet Spot RPM 1200 - 4800 Power Ranges: These are the "sweet spot" in the power range. Generally we suggest shifting at 300-500 RPM above the "sweet spot" for the best ET’s. Spring Warning: Our camshafts are not comparable to other manufacturers and require special valve spring pressures to operate and live satisfactorily. ONLY USE springs meeting the specifications listed here or on the provided cam cards. Valve spring pressures and installed heights are supplied with each camshaft. Caution: Minimum piston-to-valve clearance is .060" intake and .100" exhaust. If your clearance is not adequate, we have tooling to cut deeper valve reliefs. Check our tooling section or call us. Maximum lift with stock guide height is 0.450", more lift requires shortening the valve guides.  Related Parts: 1510S-16       1.5 Rocker Arm Kit w/Shafts                  1520S-16       1.6 Rocker Arm Kit w/Shafts                  3690              Extreme Pressure Oil Additive               5001              Hydraulic Lifter                           1302              11/32" Stem 1-Groove Valve Lock          1304              3/8" Stem 1-Groove Valve Lock              3720              20w50 Race Synthetic Blend Oil             1203              11/32" Valve Spring Retainer                 1256              3/8" Valve Spring Retainer                    1410              6 Pack Rocker Kit                               1105              Single w/Damper Valve Spring              6427              1 Bolt Cam, 3 Key Timing Chain Set     6434              1 Bolt Cam, 9 Key Timing Chain Set     .