Brand:
Manufacturer’s Part Number:
SUM-8728-1-BHV
Part Type:
Product Line:
Summit Racing Part Number:
SUM-8728-1-BHV
Cam Style:
Hydraulic roller, OE roller
Basic Operating RPM Range:
Idle-5,900
Camshaft Use:
Racing
Camshaft Manufacturers Description:
The Big Torkinator is a short-duration/high-lift beast. It’s designed to make great torque from 2,000 rpm up and pulls to 6500 rpm while remaining easy on the valvetrain with proven .600 lift beehive springs. It has a steady lope and will require tuning.
Intake Duration at 050 inch Lift:
212
Exhaust Duration at 050 inch Lift:
218
Duration at 050 inch Lift:
212 int./218 exh.
Advertised Intake Duration:
261
Advertised Exhaust Duration:
267
Advertised Duration:
261 int./267 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.600 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.585 in.
Valve Lift with Factory Rocker Arm Ratio:
0.600 int./0.585 exh.
Lobe Separation (degrees):
110
Camshaft Gear Attachment:
3-bolt
Computer-Controlled Compatible:
Yes
Lifters Included:
No
Valve Springs Included:
Yes
Valve Spring Style:
Beehive
Outside Diameter of Outer Spring (in.):
1.290 in.
Retainers Included:
No
Locks Included:
Yes
Valve Stem Seals Included:
Yes
Timing Chain and Gears Included:
No
Assembly Lubricant Included:
No
Pushrods Included:
No
Rocker Arms Included:
No
Gaskets Included:
Yes
Valve Springs Required:
Yes
Quantity:
Sold as a kit.
Notes:
Not for AFM or VVT equipped engines. Summit Pro LS cams are designed for engines swapped into pre-pollution controlled vehicles. Not for use in registered emissions-controlled vehicles operated on public highways and roads. 3-bolt camshaft, computer tuning required.
Summit Racing™ Pro LS camshaft and spring kits are designed for GM LS engines. Each cam kit offers a budget-friendly option without sacrificing quality and performance. They’re available in Stage 1 or 2 performance configurations. Stage 1 kits include the cam and matching drop in beehive springs with seals or optional upgraded dual spring and retainer kit. Stage 2 kits give you an additional cam change gasket kit and a crank bolt. Order the Summit Racing™ Pro LS camshaft kit recommended for your year/make and engine application.
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