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Technical Articles for Part Number SUM-8724-2-BHV
Summit Racing™ Pro LS Camshaft & Spring Kits SUM-8724-2-BHV
Part Number: SUM-8724-2-BHV
Summit Racing™ Pro LS Camshaft & Spring Kits
SUM-8724 Level 2 Cam Kit, Beehive Springs, Seals, Pro LS Stage 4.5 Twin-Turbo Cam. 242/248 Dur., 116+5, .625/.605 Lift, 3-bolt, 5.3, 5.7, 6.0, 6.2
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Kit/Combo Contents
ACDelco 12557840 - ACDelco GM Genuine Parts Harmonic Balancer Fastener Bolts
Harmonic Balancer Bolt, Steel, Flanged Hex, Coarse Thread, Natural, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saab, Each
Kit Item Quantity: 1
Permatex 22072 - Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker
Ultra RTV, Black, Maximum Oil Resistance, Each
Kit Item Quantity: 1
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-174005 - Summit Racing™ Valve Springs
Pro LS Valve Springs, Drop in, 0.630 Max Lift, Single Beehive, 1.3 in. O.D., 340 lbs./in. Spring Rate, 1.8 in. Installed Height, Set of 16
Kit Item Quantity: 1
Summit Racing SUM-8724R1 - Summit Racing™ Pro LS Twin Turbo Camshafts
Stage 4.5 Pro LS Twin-Turbo Cam. 242/248 Dur., 116+5, .625/.605 Lift, 3-bolt, 5.3, 5.7, 6.0, 6.2, 7.0, Vortec Truck, LS1 LS2 LS6 LS3 LS7 LQ4 LQ9, Each
Kit Item Quantity: 1
Summit Racing SUM-G2627 - Summit Racing™ Cam Change Gasket Sets
Engine Gasket Set, LS Cam Change Gasket Kit, LS-1,LS-2,LS-3,LS-6, Chevy, Set
Kit Item Quantity: 1
Overview
Brand:
Manufacturer's Part Number:
SUM-8724-2-BHV
Part Type:
Product Line:
Summit Racing Part Number:
SUM-8724-2-BHV
Cam Style:
Hydraulic roller, OE roller
Basic Operating RPM Range:
4,000-7,500
Camshaft Use:
Racing
Camshaft Manufacturers Description:
The Summit Stage 4.5 Twin Turbo cam has an unmistakable lope and is designed for large Turbine/A.R. Twin-Turbo applications. More overlap and SUM-8723R1 which adds lope and open exhaust is required. It makes excellent mid-range and top-end power. Flycutting pistons is likely. This cam is stable at high rpm with 160lb. seat pressure and 400lb. open pressure. A 4000+ stall converter is recommended.
Intake Duration at 050 inch Lift:
242
Exhaust Duration at 050 inch Lift:
248
Duration at 050 inch Lift:
242 int./248 exh.
Advertised Intake Duration:
292
Advertised Exhaust Duration:
297
Advertised Duration:
292 int./297 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.625 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.605 in.
Valve Lift with Factory Rocker Arm Ratio:
0.625 int./0.605 exh.
Lobe Separation (degrees):
116
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.
Special Attention:
Hazardous items are only returnable in person to a retail store due to strict shipping regulations.
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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