HYDRAULIC ROLLER CAM -LS1
CRANE 1449611

HYDRAULIC ROLLER CAM -GM LS1 HR236

Pro Street and Drags, for modified 5.7L thru 8.0L, rough idle, upgraded cylinder heads and valvetrain required, headers and aft cat exhaust required, 12.0+ compression ratio advised, low ratio gearing required, auto trans w/3400- 4000 stall converter, computer upgrades required.

Part Number: 1449611 Grind Number: HR-236/353-2S-12 (Z-CAM)
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1997 2005 CHEVROLET 8 HR-236/353-2S-12 camshaft - Ch. 4.8-6.2L LS V8 97-up
Engine Size Configuration
5.7- L V

Valve Setting: Intake - .000 Exhaust - .000 Hot/Cold - HOT

Lift: Intake @Cam 353 @Valve 600 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 353 @Valve 600
Rocker Arm Ratio 1.70

Cam Timing: TAPPET @ .004
Lift: Opens Closes ADV Duration
Intake 38.0 BTDC 80.0 ABDC 298.0
Exhaust 84.0 BBDC 38.0 ATDC 302.0

Spring Requirements:
Part Number 99831
Loads Closed 130 LBS @ 1.800 or 1 13/16
Open 312 LBS @ 1.220
Recommended RPM range with matching components
Minimum RPM 4000
Maximum RPM 7000
Valve Float 7200

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 11.0 BTDC 45.0 ABDC 107 236.0
Exhaust 57.0 BBDC 3.0 ATDC 117 240.0