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Edelbrock 2261 - Edelbrock Rollin' Thunder Hydraulic Roller Camshafts & Kits

Edelbrock 2261 - Edelbrock Rollin' Thunder Hydraulic Roller Camshafts & Kits
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Edelbrock#350-2261

Rollin' Thunder Hydraulic Roller Camshaft
  • 1965-95 Chevy 396-502 Mark IV & Gen V
  • .625''/.639'' Lift
  • 335°/329° Adv. Duration
  • 1500-6500 RPM Range

    Edelbrock 2261 - Edelbrock Rollin' Thunder Hydraulic Roller Camshafts & Kits Details

    Big Block Chevy

    Cam Notes: This camshaft works great when matched with Victor Jr. intake manifold p/n 350-2902 and Victor Jr. 24° cylinder heads p/n 350-77485; this combo produces 612 HP / 581 ft.-lbs. of torque (Tested on a GM ZZ-502 shortblock). 1965-66 B/B Chevys require a groove be machined in the rear cam journal for oil pressure. Matching Edelbrock roller tappet lifter set p/n 350-97433
    Use with high stall torque converter only.
    Use only stock ratio rocker arms.

    Operating Range1500-6500 RPM
    Duration Advertised335° Intake/329° Exhaust
    Duration @ .050''236° Intake/245° Exhaust
    Lift @ Valve.625'' Intake/.639'' Exhaust
    Lift @ Cam.368'' Intake/.376'' Exhaust
    Lobe Separation Angle112°
    Intake Centerline109°
    Intake Timing @ .050" Open 6° BTDC
    Close 51° ABDC
    Exhaust Timing @ .050" Open 54° BBDC
    Close 11° ATDC

    Important Application Information:
    Rollin Thunder Hydraulic Roller cams are for street high-performance and racing applications only - not for heavy vehicles. Use with Edelbrock Performer RPM heads (or other aftermarket heads), adjustable valvetrain components, screw-in studs, high performance adjustable rocker arms and at least 9.5:1 compression ratio. Headers, high-energy ignitions, lower-than-stock rear gearing and a high-performance torque converter (in auto. transmission equipped vehicles) are necessary.

    Edelbrock 2261 - Edelbrock Rollin' Thunder Hydraulic Roller Camshafts & Kits

    ROLLIN' THUNDER CAMSHAFTS

    Edelbrock Rollin' Thunder Camshafts are designed to improve horsepower and torque, produce a great sounding performance idle and provide sufficient vacuum at idle to support power accessories. Compared to conventional flat tappet hydraulic cams, Rollin' Thunder Camshafts have more aggressive lift profiles without excessive valve overlap that can compromise low-RPM drivability (reduced friction provided by roller tappets makes this combination of accelerated valve lift and reduced duration possible). Edelbrock Rollin' Thunder Camshafts are performance matched to Edelbrock Total Power Package components for proven performance.

    Rollin' Thunder Camshaft Features
  • Performance: Higher lift velocity and faster valve action increase horsepower and torque
  • Drivability: Great-sounding idle with excellent vacuum at idle to support power accessories
  • Durability: A roller tappet's small surface area + reduced friction + stronger camshaft material (hardend steel or iron) = long camshaft life
  • Environmental: Can use ILSAC GF-4 oil, which lowers engine emissions and does not require zinc or phosphate oil additives
  • Economy: Reduced contact friction between the lifter and camshaft increases fuel economy for better mileage potential

  • ROLLIN' THUNDER CAMSHAFT KITS
    These complete cam kits feature an Edelbrock Rollin' Thunder Hydraulic Roller Camshaft and Edelbrock Hydraulic Roller Lifters and Pushrods that are dyno-matched for a trouble-free installation. Each kit includes: camshaft, hydraulic roller lifters, lifter guides, pushrods, and hold-down spider (1987-Later applications only). Kits offer great performance gains when matched with the rest of the Edelbrock Total Power Package.
  • Complete kit gives you everything you need to upgrade your camshaft
  • Virtually eliminate break-in problems (no special break-in required over flat tappet cams)
  • Higher lift velocity and faster valve action produce superior horsepower and torque
  • Get more horsepower and torque without sacrificing idle quality and manifold vacuum
  • Reduced friction improves fuel economy

  • Edelbrock 350-2261

    Intake Valve Lift (in.)
    0.625
    Exhaust Valve Lift (in.)
    0.639
    RPM Range
    1500-6500
    Int. Duration @ .050 in. (Deg)
    236
    Exh. Duration @ .050 in. (Deg)
    245
    Lifter Type
    Hydraulic Roller
    Usage
    OEM
    Exh. Duration Advertised (Deg)
    329
    Int. Duration Advertised (Deg)
    335
    Engine Make/Size
    Chevy 454
    *Not legal for sale or use on pollution-controlled motor vehicles
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