Quote: Originally Posted by
CNCPORT.COM 
The main issue most guys are going to have is:
Your working with a hydraulic lifter, which relies on oil pressure to stay pumped up and bleed off. When you degree any cam in (domestic or Sport Compact) you need to calculate the crank degrees in relation to the (Intake or Exhaust valve)opening and closing locations (sometimes at 0 lash, sometimes with 0.050 lash/opening).
With a lifter that collapses without the motor pumping oil thru it, its going to be tough to degree a cam in without a lifter thats been converted so it doesn't collapse.
Thats why most guys shy away from degreeing the SRT or Mitsu 4G motors.
Finding these numbers will help you calculate Overlap, and Centerline(sometimes known as high Lift) of the Intake Cam or Exhaust Cam. And Lobe Seperation.
When your building the same motor over and over again like DCR would, you learn where the sweat spot is for a specific cam. But there is so much that can effect that optimal location, IE Back Pressure, and Turbo Efficiency, What RPM you want to make peak HP/Torque, etc.
Its always nice to know tho where the cam is and what the motor likes. This will often tell you if you can go to a different style cam and gain more power.
When I was reading into how to do it I started seeing stuff about this and my head began to spin as I became dis-interested meaning I was getting lost. It did seem too hard to figure out with the lifters and stuff. Pulus I got to wondering if the thing you stick in the spark plug hole might vary depending on where you got it on the piston since we have the kinda trangle tops to our stock pistons.
