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Howards Cams Mechanical Flat Tappet Camshaft, 4/7 Swap
By switching the firing order (1-8-7-3-6-5-4-2) on your favorite Chev V8, you will discover a broader, smoother torque curve and decrease in crankshaft deflection. More aggressive profiles can be used to get the most manageable horsepower available. These cams require no additional engine modifications, other than swapping the #4 ignition wire with #7.
Note: Always use Camshaft Break-In Lube with all new flat tappet cams.
Manufactured on Dedicated High Precision Machines
Held to Strict Tolerances
High grade quality cores
Rockwell Tested & Parkerized Ensuring the Highest Quality
Hard protective packaging
Part Type: Camshaft
Application: Chevrolet Small Block V8 262-267-302-305-307-327-350-400, '55-'98
Ignition Firing Order: OE (1-8-7-3-6-5-4-2)
Cam Style: Mechanical Flat Tappet
Basic RPM Range: 4500-8000
Manufacturers Description: Large 400+ Bracket/Class cam. Needs good heads & intake.
Intake Duration @ .050": 278
Exhaust Duration @ .050": 286
Advertised Intake Duration (@ .020"): 313
Advertised Exhaust Duration (@ .020"): 321
Intake Valve Lift with OE Rocker Ratio (1.50): .550"
Exhaust Valve Lift with OE Rocker Ratio (1.50): .570"
Intake Lobe Lift: .367"
Exhaust Lobe Lift: .380"
Intake Valve Lift with 1.55 Rocker Ratio: .569"
Intake Valve Lift with 1.60 Rocker Ratio: .587"
Intake Valve Lift with 1.65 Rocker Ratio: .605"
Exhaust Valve Lift with 1.55 Rocker Ratio: .589"
Exhaust Valve Lift with 1.60 Rocker Ratio: .608"
Exhaust Valve Lift with 1.65 Rocker Ratio: .627"
Lobe Separation Angle: 106 Degrees
Intake Centerline: 102 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: 114552-06
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.
Note: Ignition firing order must be changed to 1-8-7-3-6-5-4-2.
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