Howards Cams, Retro-Fit Hydraulic Roller Camshaft, Ford SB, 253/259 @ .050, .640/.640 112 LS |
| Item Number: HRC224455-12 |
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Howards Cams Retro-Fit Hydraulic Roller Camshaft
These cams offer significant advantages of additional lift and more power compared to flat tappet designs. The latest in lobe design produces better throttle response and top end horsepower. Designed with fast ramp speeds to give you the most power possible while maintaining the easy maintenance of the hydraulic cam. More applications available from daily street performance, street/strip, to competition designs. Money saving cam and lifter sets include cam and a set of Howards™ premium O.E. Style performance street series Retro-Fit (tie-bar) or MaxEffort™ hydraulic roller lifters, depending on application.
Part Type: Camshaft
Cam Series: Retro-Fit
Application: Ford Small Block 221-302 1963-1995, 351W 1969-96
Ignition Firing Order: 351W (1-3-7-2-6-5-4-8)
Cam Style: Hydraulic Roller Camshaft
Basic RPM Range: 3200-7200
Manufacturers Description: Best with big cubic inch, needs 11.0:1+ CR, good heads .
Intake Duration @ .050": 253
Exhaust Duration @ .050": 259
Advertised Intake Duration (@ .050"): 306
Advertised Exhaust Duration (@ .050"): 312
Intake Valve Lift with OE Rocker Ratio (1.60): .640"
Exhaust Valve Lift with OE Rocker Ratio (1.60): .640"
Intake Lobe Lift: .400"
Exhaust Lobe Lift: .400"
Intake Valve Lift with 1.65 Rocker Ratio: .660"
Intake Valve Lift with 1.70 Rocker Ratio: .680"
Intake Valve Lift with 1.72 Rocker Ratio: .688”
Exhaust Valve Lift with 1.65 Rocker Ratio: .660"
Exhaust Valve Lift with 1.70 Rocker Ratio: .680"
Exhaust Valve Lift with 1.72 Rocker Ratio: .688”
Lobe Separation Angle: 112 Degrees
Intake Centerline: 108 Degrees
Small Base Circle: No
Lifters Included: No
Cam Gear Attachment: Single-Bolt
Valve Adjustment: Zero Lash Plus ½ Turn
Manufacturer: Howards Cams & Racing Components
Manufacturer's Part Number: 224455-12
Weight: 14.0 lbs.
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Each
Note: Stock (O.E.) valve springs cannot be used.
Note: Ford SB 221-302 ignition firing order must be changed to 1-3-7-2-6-5-4-8. |
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