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COMP Cams 12-477-44 - Camshaft CS 311Qs10 .900 Base

COMP Cams 12-477-44 - Camshaft CS 311Qs10 .900 Base

COMP Cams | 12-477-44
SKU: COMP-12-477-44
Regular price $703.99 USD
Regular price $774.39 USD Sale price $703.99 USD
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COMP Cams 12-477-44 - Camshaft CS 311Qs10 .900 Base

4-Pattern 258/268 IB, 260/270 OB Hydraulic Roller Cam for Chevrolet Small Block

Fits '58-'02 262-400 c.i.d. Chevy Small Blocks .900" Camshaft Base Circle for Applications needing additional connecting rod clearance due to "stroker" crankshaft. Recommended in highly modified 420+ c.i.d. stroker Applications with higher compression - 3500+ Stall. Upgraded valve train components and aftermarket cylinder heads required. WARNING: Camshaft Optimized for use with a Melanized or Nitrided distributor Gear. Not compatible with cast or Steel Gears without similar surface treatments. Failure to utilize the proper distributor Gear will void all warranties and/or return policies.4-Pattern‚Optimize Valve Events Based on Runner Lengthš Increases Area Under the Curve and High RPM Stability. To make the most power from your engine, you need to optimize the air ingested and captured by avoiding valves closing too soon or too late. Any conventional center layout single throttle body or carbureted V8 intake manifold features longer outboard runners and shorter inboard runners, meaning that each valve event should occur at a different moment. COMP Cams 4-Pattern Camshafts are the very first Series of cams designed to accommodate this difference in length and avoid valves closing at the wrong times. NASCAR teams have been using Camshafts designed this way for years, and using lessons learned along with them, COMP Cams has designed a Series of cams that optimizes valve events and features a large increase in both area under the curve and stability at high RPM.

Lifters Included: No
Valve Springs Required: Yes
Assembly Lubricant Included: No
Camshaft Gear Attachment: 3-Bolt
Camshaft Material: Billet Steel
Engine Family: Chevrolet 262-400 c.i. 8 Cylinder (1958-1998)
Lifter Type: Hydraulic Roller
Amazon ASIN: B00CWZUWVI
C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: Yes, but must be a race/competition only vehicle.
C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for On-Road Vehicles?: No
C.A.R.B. Exemption Reason: N/A
C.A.R.B. E.O. Number: N/A
Grind Number: 311QS10
Camshaft Series: 4-Pattern Small Base Circle
Usage: Street/Strip
Cam Type: Hydraulic Roller
Grind Number: 311QS10
Basic Operating RPM Range: 3200-7,500
Inboard Intake Duration at .050 Inch Lift: 258
Outboard Intake Duration at .050 Inch Lift: 260
Inboard Exhaust Duration at .050 inch Lift: 268
Outboard Exhaust Duration at .050 inch Lift: 270
Advertised Inboard Intake Duration: 311
Advertised Outboard Intake Duration: 313
Advertised Inboard Exhaust Duration: 323
Advertised Outboard Exhaust Duration: 325
Inboard Intake Valve Lift: 0.637
Outboard Intake Valve Lift: 0.637
Inboard Exhaust Valve Lift: 0.621
Outboard Exhaust Valve Lift: 0.621
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