Howards Cams® Big Bottle Cams, Nitrous Oxide Mechanical Roller Camshafts
Designed specifically for nitrous oxide applications. These camshafts have camshaft lobes matched to the application to give you the best performance and horsepower. Most applications are designed for good power and throttle response without the nitrous, but give you big gains when the nitrous oxide is engaged. Grinds available for small plate systems to big multi-stage port injected systems.
Manufactured on Dedicated High Precision Machines
Held to Strict Tolerances
High grade quality cores
Hard protective packaging
Part Type: Camshaft
Application: Chevrolet Big Block Mark IV 396-502 1965-1996
Ignition Firing Order: OE (1-8-4-3-6-5-7-2)
Cam Style: Nitrous Oxide Mechanical Roller
Basic RPM Range: 4000-7000
Manufacturers Description: Rough idle, aggressive upper RPM performance. 250+ plate systems, 11.0:1+ CR.
Intake Duration @ .050": 267
Exhaust Duration @ .050": 279
Advertised Intake Duration (@ .020"): 299
Advertised Exhaust Duration (@ .020"): 311
Intake Valve Lift with OE Rocker Ratio (1.70): .714"
Exhaust Valve Lift with OE Rocker Ratio (1.70): .725"
Intake Lobe Lift: .420"
Exhaust Lobe Lift: .426"
Intake Valve Lift with 1.72 Rocker Ratio: .722"
Intake Valve Lift with 1.75 Rocker Ratio: .735"
Intake Valve Lift with 1.80 Rocker Ratio: .756"
Exhaust Valve Lift with 1.72 Rocker Ratio: .733"
Exhaust Valve Lift with 1.75 Rocker Ratio: .745"
Exhaust Valve Lift with 1.80 Rocker Ratio: .767"
Lobe Separation Angle: 112 Degrees
Intake Centerline: 108 Degrees
Small Base Circle: No
Cam Gear Attachment: 3-Bolt
Valve Adjustment Intake: .022
Valve Adjustment Exhaust: .022
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: 120453-12
Weight: 10.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Each
Note: Stock (O.E.) valve springs cannot be used.
Note: Requires Thrust Button.
Note: Requires upgraded distributor gear/fuel pump pushrod. |