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Howards Cams 4/7 Swap Mechanical Flat Tappet Camshaft & Lifter Set
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 managable horsepower available. These cams require no additional engine modifications, other than swapping the #4 ignition wire with #7.
Manufactured on Dedicated High Precision Machines
Held to Strict Tolerances
High grade quality cores
Rockwell Tested & Parkerized Ensuring the Highest Quality
Includes Matching Premium Lifters
Part Type: Camshaft and Lifter Set
Application: Chevrolet Big Block Mark IV 396-502 1965-1996
Ignition Firing Order: OE (1-8-7-3-6-5-4-2)
Cam Style: Mechanical Flat Tappet
Basic RPM Range: 3000-6800
Manufacturers Description: Rough idle, good mid to upper range performance. 3000+ stall, 11.5:1+ CR.
Intake Duration @ .050": 252
Exhaust Duration @ .050": 260
Advertised Intake Duration (@ .006"): 287
Advertised Exhaust Duration (@ .006"): 295
Intake Valve Lift with OE Rocker Ratio (1.70): .618"
Exhaust Valve Lift with OE Rocker Ratio (1.70): .640"
Intake Lobe Lift: .363"
Exhaust Lobe Lift: .376"
Intake Valve Lift with 1.72 Rocker Ratio: .625"
Intake Valve Lift with 1.75 Rocker Ratio: .636"
Intake Valve Lift with 1.80 Rocker Ratio: .654"
Exhaust Valve Lift with 1.72 Rocker Ratio: .647"
Exhaust Valve Lift with 1.75 Rocker Ratio: .659"
Exhaust Valve Lift with 1.80 Rocker Ratio: .678"
Lobe Separation Angle: 108 Degrees
Intake Centerline: 104 Degrees
Lifters Included: Yes, 91118 Direct Lube Mechanical Flat Tappet
Small Base Circle: No
Cam Gear Attachment: 3-Bolt
Valve Adjustment: .022/.022
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: CL124902-08DL
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.
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