Camshaft - Rollin Thunder - Hydraulic Roller - Lift 0.625 / 0.639 in - Duration 335 / 339 - 112 LSA - 1500 / 6500 RPM - Big Block Chevy - Each

Edelbrock BBC Hydraulic Roller Cam

Edelbrock Rollin' Thunder Camshaft #2261 is designed for 396-502 V8 Mark IV and Gen V engines from 1967-95 and produce optimum torque from the low-end to the mid-range. Rollin' Thunder camshafts match with Performer manifolds for vehicles operating from off-idle to 5500 rpm. They are smooth idling cams for daily drivers, trucks, vans, RVs and 4x4s. You can expect a major improvement in throttle response and torque. In the manifold section you'll find torque graphs showing the power gains from Performer manifolds and Performer-Plus cams. All camshafts include flat tappet lifters (except for cams designed for use with stock roller lifters), assembly lube and instructions. This cam produced 611HP and 573 Ft Lbs of Torque when paired with Victor Jr. intake manifold #2902 and Victor Jr. 24 Degree cylinder heads #77485 on a GM ZZ-502 short block. Not for 1965-66 Big Block Chevy's running a grooved rear cam journal. Use with a high stall torque converter and stock ratio rocker arms only.Camshaft specifications:- Intake duration: 236 Degrees- Exhaust duration: 245 Degrees- Intake lift: .625"- Exhaust lift: .639"- Lobe separation: 112 Degree- Intake Center Line: 109 Degree- Vacuum: 10"

Additional Information

Rollin Thunder Camshaft for 1965-95 Big-Block Chevy 396-502 V8 (Mark IV/Gen V)

Application Summary

Chevrolet:Big-Block Mark IV:396 (6.6L)/402 (6.6L)/427 (7.0L)/454 (7.4L)/502 (8.2L);Chevrolet:Big-Block Gen V:396 (6.6L)/402 (6.6L)/427 (7.0L)/454 (7.4L)/502 (8.2L)

Part Type

Engine Camshaft

Product Overview

Edelbrock Rollin' Thunder Camshaft #2261 is designed for 396-502 V8 Mark IV and Gen V engines from 1967-95 and produce optimum torque from the low-end to the mid-range. Rollin' Thunder camshafts match with Performer manifolds for vehicles operating from off-idle to 5500 rpm. They are smooth idling cams for daily drivers, trucks, vans, RVs and 4x4s. You can expect a major improvement in throttle response and torque. In the manifold section you'll find torque graphs showing the power gains from Performer manifolds and Performer-Plus cams. All camshafts include flat tappet lifters (except for cams designed for use with stock roller lifters), assembly lube and instructions. This cam produced 611HP and 573 Ft Lbs of Torque when paired with Victor Jr. intake manifold #2902 and Victor Jr. 24 Degree cylinder heads #77485 on a GM ZZ-502 short block. Not for 1965-66 Big Block Chevy's running a grooved rear cam journal. Use with a high stall torque converter and stock ratio rocker arms only. Camshaft specifications: - Intake duration: 236 Degrees - Exhaust duration: 245 Degrees - Intake lift: .625" - Exhaust lift: .639" - Lobe separation: 112 Degree - Intake Center Line: 109 Degree - Vacuum: 10"

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

• Use Only Stock Ratio Rocker Arms

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Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions
2.	Technical Bulletin

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Camshaft, Hydraulic Roller Tappet, Advertised Duration 335/339, Lift .625/.639, Chevy, Big Block, Each

Make some noise with Edelbrock Rollin' Thunder hydraulic roller camshafts. Designed to improve horsepower and torque, they feature more aggressive profiles than conventional flat-tappet hydraulic cams without excessive valve overlap. Recommended for high performance street and strip use, Edelbrock Rollin' Thunder hydraulic roller camshafts work best from 1,500 to 6,500 rpm and are performance matched to Edelbrock Total Power Package components for proven performance.

Features Include:
• Performance--roller camshafts generate higher lift velocity and faster valve action for increased horsepower and torque gains
• Drivability--produces great sounding idle with excellent vacuum at idle
• Durability--the smaller surface contact area of roller tappets and their reduced friction, together with stronger camshaft material (hardened steel or iron) ensures longer camshaft life
• Environmental--can use ILSAC GF-4 oil, which lowers emissions and does not require zinc or phosphate oil additives
• Economy--reduced contact friction between the lifter and camshaft can increase fuel economy for better mileage