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Technical Articles for Part Number HRS-258111-09
Howards Cams Rattler Camshafts
Camshaft, Hydraulic Flat Tappet, Rattler, Advertised Duration 297/305, Lift .548/.548, Ford, FE, Each
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Estimated Ship Date from OH, NV, TX: Tomorrow Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
258111-09
Part Type:
Product Line:
Summit Racing Part Number:
HRS-258111-09
UPC:
840793134397
Cam Style:
Hydraulic flat tappet
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:
297
Advertised Exhaust Duration:
305
Advertised Duration:
297 int./305 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.548 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.548 in.
Valve Lift with Factory Rocker Arm Ratio:
0.548 int./0.548 exh.
Lobe Separation (degrees):
109
Camshaft Gear Attachment:
1-bolt
Remanufactured:
No
Computer-Controlled Compatible:
No
Valve Springs Required:
Yes
Quantity:
Sold individually.
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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