Howards Cams Steel Billet Mechanical Roller Camshaft
All Howards mechanical roller cams are ground on the billet still cores in house at Howards Cams. Mechanical roller cams are designed and mainly used in full competition applications. Real race conditions are extremely punishing to the valvetrain and the camshaft. So why would you use a cast core? No matter how good the heat-treatment, a cast care (SADI) will not provide the performance or durability of an American steel billet cam. Why are some cam companies using cast (SADI) cores? Lower cost, which equals higher profits. Howards Cams will not skimp on materials just for higher profits. Extreme conditions require better materials, better technology and better design. Better cam.... Great price! Made in the USA!
Manufactured on Dedicated High Precision Machines
Held to Strict Tolerances
High grade quality cores
100% Rockwell Tested & Parkerized Ensuring the Highest Quality
Hard protective packaging
Part Type: Camshaft
Application: Chrysler BB B/RB 383-440 1959-1980
Ignition Firing Order: (1-8-4-3-6-5-7-2)
Cam Style: Steel Billet Mechanical Roller Camshaft
Basic RPM Range: 3000-6400
Manufacturer's Description: Rough idle, hot street/bracket, strong mid-range horsepower.
Intake Duration @ .050": 253
Exhaust Duration @ .050": 259
Advertised Intake Duration (@ .020"): 285
Advertised Exhaust Duration (@ .020"): 291
Intake Valve Lift with OE Rocker Ratio (1.50): .600"
Exhaust Valve Lift with OE Rocker Ratio (1.50): .585"
Intake Lobe Lift: .400"
Exhaust Lobe Lift: .386"
Intake Valve Lift with 1.55 Rocker Ratio: .620"
Intake Valve Lift with 1.60 Rocker Ratio: .640"
Intake Valve Lift with 1.65 Rocker Ratio: .660"
Exhaust Valve Lift with 1.55 Rocker Ratio: .599"
Exhaust Valve Lift with 1.60 Rocker Ratio: .619"
Exhaust Valve Lift with 1.65 Rocker Ratio: .638"
Lobe Separation Angle: 108 Degrees
Intake Centerline: 104 Degrees
Lifters Included: No
Small Base Circle: No
Cam Gear Attachment: 3-Bolt
Valve Adjustment: .022/.022
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: 721743-08
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 upgraded distributor gear/fuel pump pushrod.
Note: Requires 3-bolt timing set. |