Hamilton Cummins Stage 3 – 188/220 Hot Street/Strip Cam

Information:

• RPM Range: 1400-3400
• Drops EGT 200-300
• Increased Fuel economy 2-3 MPG
• Increased spool up time
• Increased bottom ? midrange
• Duration at .050? of lift? 188 Intake, 220 Exhaust

Modification Required:

• For it to be ?drop in? on a 12v you will need no more than .025? piston protrusion and at least .055? valve face depth with a standard head gasket and a 99 intake centerline. On a 98 ? 02 24v you will need no more than .025? piston protrusion and at least .038? valve face depth with a standard gasket. On an 03 and up, it needs .018?piston protrusion and at least .038? valve face depth with a standard gasket. ?If you do not meet the minimum requirements for piston to valve clearance, don?t worry, you can still run an oversize head gasket or cut valve reliefs.
• Although this is considered a drop in cam it is important to check clearances (You can use our?clearance calculator?to make it a little easier)
• We always recommend new lifters when changing a cam.

Applications:

• Used in daily drivers
• Smaller?single, or set of compounds
• Weekend warrior
• Towing

Break in:

To make sure that you have no issues during break-in, follow these few suggestions.

• Make sure that the cam has a Liberal amount of quality assembly lube applied
• DO NOT let the engine start without oil pressure
• When this is a new engine, be sure to put a liberal amount of assembly lube in the oil pump and prime the oil filter
• Be sure to change the oil after you have done your break-in procedure. When the filter and oil system are already primed, the engine will get oil pressure much faster than if the oil is changed at the same time.
• Disconnect the fuel system and spin the engine with the starter until oil pressure can be read or until oil is coming out of the rocker arms.
• Do not let the starter run for more than 10 seconds at a time
• Once oil pressure has been verified, let the engine start and run for five minutes at 1200-1500rpm then shut the engine down
• Adjust valves then you are cleared to abuse your engine. Enjoy the added airflow
• if you need to re-torque or ?hot-torque ?the head, do so before adjusting valves. Re-torquing the head changes the valve lash setting, so it is important to set lash last.