The Colt Cams Stage 3 "Big Stick" Cummins Camshaft gives you excellent performance, driveability, and is the most popular Cummins Camshaft in the Colt Cams lineup. Colt has worked long and hard on their camshaft profiles and has dyno'd over 50 different combination to give you the ultimate camshaft.
Stage 3:Nicknamed the "Big Stick", this cam has gained the most popularity. Delivering the strongest mid-range torque and H.P. possible it still has good bottom end and drivability. No mods are required but a set of springs is recommended. The secret to the outstanding performance of these cams is their ramp velocity and acceleration.
Follow Cummins installation instructions, use adequate amounts of assembly lube.
Retainer Torque - 44 ft-lbs. Use red loctite.
When using retainer on Common Rail, clearance is required.
Always use new or re-crowned lifters.
Big Stick cast billets require 2nd gen 24V lifters. Cummins Part# 3942565
If using Common Rail lifted with larger head, make sure it clears the fuel pump lobe #5 on 12V engines. CR blocks should be okay but you should still check. If your gear is not pressed on all the way, the lifters could touch.
Extra clearance may be required with aftermarket connecting rods.
Drop-in cam is applicable in MOST cases, you MUST check clearances. Especially if a head has been planed, block decked,valve recessions..etc. Always check clearances before starting.
Cam lube on all lobes, lifter faces, and oil pump gears.
Oil all bearing journals and lifter barrels.
Always turn engine over by hand before starting, check for clearances and proper timing location.
Fire up to 1800-2000 RPM for 18-20 minutes.
Zinc Additive:Most oil companies have taken out a percentage of additives that are meant for anti-scuffing for break-in on flat tappet cams. A zinc additive must be added to your oil before you fire up your engine for the first time.