178/208 Efficiency Camshaft — Cast
Hamilton’s towing and street grind. Short duration and a wide lobe separation give it the least valve overlap of any Hamilton cam, which is what makes it the strongest choice for pulling weight, running at altitude and living with high drive pressure.
Specifications
- Duration at .050" lift: 178° intake / 208° exhaust
- Lift: .290" intake / .320" exhaust
- Lobe separation: 110° LSA
- Usable range: idle–4,000 rpm
- Typical EGT reduction: 200–300°F
What It Does
- Builds low-rpm torque and improves drivability
- Helps spool large single turbochargers
- Improves fuel economy — owners commonly report 1–3 mpg
- Proven to 1,588 hp on Hamilton’s engine dyno with a ported head
Best For
- Towing and heavy hauling
- Daily driving
- High-altitude operation
- Trucks fighting high drive pressure
Installation Notes
-
12-valve: no more than .020" piston protrusion, at least .055" valve face depth, 99° intake centerline
-
24-valve: no more than .020" piston protrusion, at least .038" valve face depth
- Fit new lifters whenever the camshaft is changed
- Hamilton warranties its cams only when run with Hamilton lifters and springs
Fitment
1989–2007 Dodge Ram 5.9L Cummins and 2007.5–2018 Ram 6.7L Cummins flat-tappet engines. Verify piston-to-valve clearance before ordering.
