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Technical Articles for Part Number SUM-8720-1
Summit Racing™ Pro LS Camshaft & Spring Kits
Camshaft Kit, Pro LS Vortec Truck Swap, Hydraulic Roller Tappet, Advertised Duration 278/287, Lift .600/.600, Chevy GM, LS/LSX, Gen III/IV, Kit
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Kit/Combo Contents
Summit Racing SME-143008 - Summit Racing™ Valve Seals
Valve Seals, Positive Stop, Viton® Fluoroelastomer, 8mm Stem, 0.500 in. Guide, Set of 16, LS1 hat style with single spring locator
Kit Item Quantity: 1
Summit Racing SME-143009 - Summit Racing™ Valve Locks
Valve Locks, Stamped Steel, 7 Degree, 8mm Stem, 1-Groove, Commonly used with LS Gen III/IV and Gen. V LT stock retainers, Set of 32
Kit Item Quantity: 1
Summit Racing SUM-174004 - Summit Racing™ Valve Springs
Pro LS Valve Springs, Drop in, 0.600 Max Lift, Single Beehive, 1.290 in. O.D., 310 lbs./in. Spring Rate, 1.800 in. Installed Height, Set of 16
Kit Item Quantity: 1
Summit Racing SUM-8720R1 - Summit Racing™ Pro LS Vortec Truck Swap Camshafts
Camshaft, Stage 2, LS Truck Swap Cam, High lift version, 218/227 112+2, .600/.600 Lift, 3-bolt, LS1 LS2 LS6 LS3 LQ4 LY6 LQ9 Each
Kit Item Quantity: 1
Overview
Brand:
Manufacturer's Part Number:
SUM-8720-1
Part Type:
Product Line:
Summit Racing Part Number:
SUM-8720-1
Cam Style:
Hydraulic roller, OE roller
Basic Operating RPM Range:
2,500-6,500
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
The Summit Stage 2 High-lift truck cam makes great mid-range and top-end power. It's the largest recommended with a stock converter. It has a noticeable lope depending on idle speed. Works well with nitrous or supercharger.
Intake Duration at 050 inch Lift:
218
Exhaust Duration at 050 inch Lift:
227
Duration at 050 inch Lift:
218 int./227 exh.
Advertised Intake Duration:
267
Advertised Exhaust Duration:
276
Advertised Duration:
267 int./276 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.600 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.600 in.
Valve Lift with Factory Rocker Arm Ratio:
0.600 int./0.600 exh.
Lobe Separation (degrees):
112
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:
No
Valve Springs Required:
No
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 & Spring Kits
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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