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Technical Articles for Part Number HRS-258085-09
Howards Cams Rattler Camshafts
Camshaft, Hydraulic Roller Tappet, Rattler, Advertised Duration 296/304, Lift .618/.601, Ford, 352-428 FE, Each
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Overview
Brand:
Manufacturer's Part Number:
258085-09
Part Type:
Product Line:
Summit Racing Part Number:
HRS-258085-09
UPC:
840793134380
Cam Style:
Hydraulic roller, Retro-fit
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
Rough idle, Pro street or street/strip, Needs 9.5:1+ compression and 2800+ stall converter.
Basic Operating RPM Range:
2,400-5,600
Intake Duration at 050 inch Lift:
243
Exhaust Duration at 050 inch Lift:
251
Duration at 050 inch Lift:
243 int./251 exh.
Advertised Intake Duration:
296
Advertised Exhaust Duration:
304
Advertised Duration:
296 int./304 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.618 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.601 in.
Valve Lift with Factory Rocker Arm Ratio:
0.618 int./0.601 exh.
Lobe Separation (degrees):
109
Camshaft Gear Attachment:
1-bolt
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
This is a steel billet core and requires the use of a bronze distributor gear.
Howards Cams Rattler Camshafts
Howards Cams Rattler camshafts build solid power and a classic sound while retaining drivability. They feature wider lobe centers and use a more aggressive ramp rate to help with air velocity. Although their design is for high-performance street use, they also work well with a stock torque converter. Howards Cams recommends using their Rattler camshafts with a converter stalling above 1,800 rpm and a set of steeper rear-end gears.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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