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Howards Cams Boost Hydraulic Flat Tappet Cam & Lifter Sets - For Forced Induction Applications
If it's a small street supercharged or 8-71, to a dual turbo setup, Boost is for you. Developed with specific high intensity lobes to give you the maximum power and overall performance with a wide power band. Designed for the daily street car to the weekend warrior. Each set includes matching premium grade lifters.
Part Type: Camshaft and Lifter Set
Application: Chevrolet Big Block Mark IV 396-502 '65-'96
Ignition Firing Order: OE (1-8-4-3-6-5-7-2)
Camshaft/Lifter Style: Hydraulic Flat Tappet
Basic RPM Range: 2500-6400
Manufacturers Description: Blower, Rough idle. Pro Street or Street/Strip. Needs 9.5:1 compression, 2800+
Intake Duration @ .050": 249
Exhaust Duration @ .050": 259
Advertised Intake Duration (@ .006"): 303
Advertised Exhaust Duration (@ .006"): 313
Intake Valve Lift with OE Rocker Ratio (1.50): .595"
Exhaust Valve Lift with OE Rocker Ratio (1.50): .595"
Intake Lobe Lift: .396"
Exhaust Lobe Lift: .396"
Intake Valve Lift with 1.55 Rocker Ratio: .614"
Intake Valve Lift with 1.60 Rocker Ratio: .634"
Intake Valve Lift with 1.65 Rocker Ratio: .653"
Exhaust Valve Lift with 1.55 Rocker Ratio: .614"
Exhaust Valve Lift with 1.60 Rocker Ratio: .634"
Exhaust Valve Lift with 1.65 Rocker Ratio: .653"
Lobe Separation Angle: 114 Degrees
Intake Centerline: 110 Degrees
Lifters Included: Yes, 91112, Performance Hydraulic Flat Tappet
Small Base Circle: No
Cam Gear Attachment: 3-Bolt
Valve Adjustment: Zero Last Plus 1/2 Turn
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: CL129421-14
Weight: 16.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Each
Note: Oil with ZDDP or ZDDP Additive Required
Note: Stock (O.E.) valve springs cannot be used.
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