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Howards Rattler Cams Hydraulic Flat Tappet Camshaft
Rattlers cams are for street enthusiasts who want the classic exhaust sound, but also want true performance to go with it. These camshafts offer performance that just doesn’t thump around. They give you a the performance and throttle response you expect from a performance cam. Don’t let the others fool you, sound is not everything. If you want both sound and performance, you need a Howards Cams Rattler. The best of both worlds.
Note: To get the best exhaust tone, you should use a good dual exhaust system without a cross-over. A cross-over will add minor performance, but mellow the exhaust tone.
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: Chevrolet BB Mark IV 396-502 1965-1996
Ignition Firing Order: OE (1-8-4-3-6-5-7-2)
Cam Style: Hydraulic Flat Tappet
Basic RPM Range: 2000-5900
Manufacturers Description: Big Mama Rattler, Lopey idle. Street or Street/Strip. Needs 9.0:1 compression, 2500+ stall.
Intake Duration @ .050": 235
Exhaust Duration @ .050": 243
Advertised Intake Duration (@ .006"): 289
Advertised Exhaust Duration (@ .006"): 297
Intake Valve Lift with OE Rocker Ratio (1.70): .553"
Exhaust Valve Lift with OE Rocker Ratio (1.70): .545"
Intake Lobe Lift: .325"
Exhaust Lobe Lift: .320"
Intake Valve Lift with 1.72 Rocker Ratio: .559"
Intake Valve Lift with 1.75 Rocker Ratio: .569"
Intake Valve Lift with 1.80 Rocker Ratio: .585"
Exhaust Valve Lift with 1.72 Rocker Ratio: .551"
Exhaust Valve Lift with 1.75 Rocker Ratio: .561"
Exhaust Valve Lift with 1.80 Rocker Ratio: .577"
Lobe Separation Angle: 109 Degrees
Intake Centerline: 103 Degrees
Lifters Included: No
Small Base Circle: No
Cam Gear Attachment: 3-Bolt
Valve Adjustment: Zero Lash Plus 1/2 Turn
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: 128041-09
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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