Big Block Mopar Roller Camshaft
 

This is a Cam Dynamics camshaft for a Chrysler B/RB, ground on a Crane 8620 steel billet core (that's the 689356 number). Recommended valve lash is .030" at operating temperature. Advertised duration is 318 degrees. Lobe lift is .440", resulting in a gross valve lift of .660" with the standard 1.5:1 ratio rocker arms. The .050" tappet lift duration is actually 278 degrees. Cam timing at .050" is: intake opens 35 BTDC, intake closes 63 ABDC, exhaust opens 67 BBDC, exhaust closes 31 ATDC. Lobe separation is 106 degrees, with 2 degrees of advance ground into the cam. This was a popular single 4bbl Super Stock camshaft. Information confirmed by Crane Cams which bought out Cam Dynamics some years ago.

Cam Dynamics Mechanical Roller Racing Camshaft
It is a Crane 8620 Steel Billet Core
Camshaft Specifications:
Part No: CDR274-06
Core No: 689356
Batch No: 8A2A

Advertised Duration:
318

Duration @ .050
278

Valve lift with 1.5 ratio rocker arms
0.660

Camshaft Lobe lift
0.440

Camshaft Timing @ .050:
Intake Opening: 35 BTDC(Before top dead center)
Intake Closing: 63 ABDC (After bottom dead center)
Exhaust Opening: 67 BBDC (After bottom dead center)
Exhaust Closing: 31 ATDC (After top dead center

Lobe Centerline: 106
2 degees advance ground into camshaft


Valve lash at operating temperature:
Intake: 0.030
Exhaust: 0.030

This is one of our additional racing camshafts and is in good shape. Item is sold as is and priced to move. Please send me a message if you have any questions.
$150 plus shipping for the camshaft.

See ebay add below for pics:




ITEM IS SOLD!