HEMI Technical Info

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Camshaft

Cam location, Std.-stock HEMI / 440 or  +.250 raised

Cam diameter, Std.-stock HEMI /440 or large diameter ( 2 1/8(54mm), 60mm, or 65mm )

Cam Journals, Std.-stock HEMI /440 , bare aluminum Journals ( no bearings), aftermarket Babbit Bearings or Needle Bearings

A - Large journal Raised cam:
  -W -narrow center  journal .904 or 1" lifters
  - D larger cam Diameter (Note X)
  - X cam has been reground several times and
resulted in base circle smaller than original diameter
  S - low spring pressure for RPM used resulting in
bouncing lifter and finally broken lifter.

B - Standard journal Raised cam:
  - W -wide center  journal .904" lifters only
  - D smaller cam Diameter



 

A - Large journal Raised cam:
  - P2 - 2 or 3 - 5/16" drive pins
  - 3/8" Bolts
B - Standard journal Raised cam:
 - P1 - 1 - 1/4" drive pins
- 5/16" Bolts
Gear drives are the same for all "raised" camshafts the cam has a step for the original cam diameter (pictured above 2 left camshafts) the thrust bearing (Torrington) is larger :
60mm --> shims are .040" thick x 3.335" O.D. with a 2.375" I.D. and the bearing is .120" thick x 3.335" O.D. x with a 2.375" ID

Raised camshafts are ground with 48 degree lifter angles ( to correct the geometry )
( * some early cams were ground at 50 degree lifter angles-for Hemi and 47 degree for RB/BB )
stock cam location is 45 degree lifter angleS

and optional firing orders