Crower Pontiac 287-455 V8 Ultra Beast Hydraulic (278H)
Engine Make: Pontiac
Year: 1955-1981
Part Class: Camshaft
Camshaft Name: Ultra Beast
Camshaft Series: Beast
Engine Type: V8
Engine Size: 287, 301, 316, 341, 350, 370, 389, 400, 421 & 455
Product Type: Hydraulic Flat Tappet
Valve Lash: .000" intake and .000" exhaust
Lobe center: 112
Advertised Duration: Intake / Exhaust: 304 / 316
Duration @ .050" Lift: Intake / Exhaust: 231 / 240
Lobe Lift: Intake / Exhaust: .313 / .313
Rocker Ratio: Intake / Exhaust: 1.5 / 1.5
Gross Valve Lift: Intake / Exhaust: .470 / .470
CID: 428
Performance Level: 4
Low RPM: 2000
Peak HP: 4800
Redline: 6200
Performance Description: Hot street profile that delivers impressive mid-range and top end power.
Engine Application: Level 4 camshafts are designed for heavily modified engines. They have a definate lope at idle and are best suited for dual purpose hot street/drag strip, hot marine and oval track applications.
Recommended Modifications: Headers, dual exhaust, large cfm carburetor, performance ignition and increased compression of 10.25:1 and above is required. Cylinder head modifications would be beneficial. Use with automatic transmission with high stall torque converter or manual transmission. Close attention to proper ring and pinion gear set and tire diameter is imperative.
Product Characteristics Definate lope at idle. These grinds exhibit strong mid-range to top end toque and horsepower.
CID #2: 455
Performance Level 2: 4
Low RPM #2: 2000
Peak HP #2: 4800
Redline #2: 6200
Performance Description 2: Hot street profile that delivers impressive mid-range and top end power.
Engine Application 2: Level 4 camshafts are designed for heavily modified engines. They have a definate lope at idle and are best suited for dual purpose hot street/drag strip, hot marine and oval track applications.
Recommended Modifications 2: Headers, dual exhaust, large cfm carburetor, performance ignition and increased compression of 10.25:1 and above is required. Cylinder head modifications would be beneficial. Use with automatic transmission with high stall torque converter or manual transmission. Close attention to proper ring and pinion gear set and tire diameter is imperative.
Product Characteristics 2 Definate lope at idle. These grinds exhibit strong mid-range to top end toque and horsepower.
Grind Number: 304H
Recommended Kit #1: 84160
Recommended add-on: 86092