Howards Cams Street Force Hydraulic Flat Tappet Camshaft & Lifter Set
Designed for the street performance enthusiast. They feature true street performance with little or no added maintenance. These grinds feature lobes designed to be easy on the valvetrain, and add useable torque, horsepower and throttle response. They also have 112 degree lobe separations to help maintain vacuum. Street Force 4 requires an improved intake and exhaust. A good street 2800-3200 converter is also needed. The addition of small tube headers, a good ignition and lower gears makes this combination a lot of fun.
Note: Some applications may require a vacuum canister or pump.
Manufactured on Dedicated High Precision Machines
Held to Strict Tolerances
High grade quality cores
Rockwell Tested & Parkerized Ensuring the Highest Quality
Part Type: Camshaft & Lifter Set
Application: Oldsmobile 39° V8 400-455 1967-1990
Ignition Firing Order: OE (1-8-4-3-6-5-7-2)
Cam Style: Hydraulic Flat Tappet
Basic RPM Range: 2400-6400
Manufacturers Description: Noticeable idle, Hot Street & mild Bracket Racing.
Intake Duration @ .050": 235
Exhaust Duration @ .050": 245
Advertised Intake Duration (@ .006"): 289
Advertised Exhaust Duration (@ .006"): 299
Intake Valve Lift with OE Rocker Ratio (1.60): .520"
Exhaust Valve Lift OE Rocker Ratio (1.60): .544"
Intake Lobe Lift: .325"
Exhaust Lobe Lift: .340"
Intake Valve Lift with 1.65 Rocker Ratio: .536"
Intake Valve Lift with 1.70 Rocker Ratio: .553"
Intake Valve Lift with 1.72 Rocker Ratio: .559"
Exhaust Valve Lift with 1.65 Rocker Ratio: .561"
Exhaust Valve Lift with 1.70 Rocker Ratio: .578"
Exhaust Valve Lift with 1.72 Rocker Ratio: .585"
Lobe Separation Angle: 112 Degrees
Intake Centerline: 108 Degrees
Lifters Included: Yes, 91411 Hydraulic Flat Tappet
Small Base Circle: No
Cam Gear Attachment: Single-Bolt
Valve Adjustment: Zero Lash Plus 1/2 Turn
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: CL510041-12
Weight: 10.0 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. |