Free Shipping & Handling on Orders Over $75 - Order by 11pm EST for Same-Day Shipping!
0
My Cart
$0.00
Shop By
Category
All Categories

Rebates
Gift Certificates
My Account
Help

COMP Cams 12-477-44 - Comp Cams 4-Pattern Camshafts



COMP Cams 12-477-44 - Comp Cams 4-Pattern Camshafts

JEGS Part Number: 249-12-477-44

4-Pattern .900" Base Circle Retro-Fit Hydraulic Roller Camshaft
Small Block Chevy
Intake Lift: .637"/.637"
Exhaust Lift: .621"/.621"
Lobe Separation Angle: 110.5°/109.5°
RPM Range: 3200-7500
$688.99

Ships
if Ordered Today
FREE Shipping

COMP Cams 12-477-44 - Comp Cams 4-Pattern Camshafts Details

Small Block Chevy 262-400ci 1955-98

  • .900" Base Circle Retro-Fit

    Intake Duration: 313°/311°
    Exhaust Duration: 325°/323°

    Recommended in highly modified 420+c.i. stroker applications with higher compression. 3500+ stall.

  • Specifications:

    Exhaust Valve Lift (in.)
    0.621
    Intake Valve Lift (in.)
    0.637
    Int. Duration @ .050 in. (Deg)
    260
    Exh. Duration @ .050 in. (Deg)
    270
    Int. Duration Advertised (Deg)
    313
    Exh. Duration Advertised (Deg)
    325
    Engine Make/Size
    Chevy Small Block (262-400)
    Lifter Type
    Hydraulic Roller Retrofit
    Usage
    Street/Strip
    RPM Range
    3200-7500
    Advertised Duration
    313 int./325 exh., 311 int./323 exh.
    Advertised Exhaust Duration
    325/323
    Advertised Intake Duration
    313/311
    Basic Operating RPM Range
    3,200-7,500
    Cam Style
    Hydraulic roller tappet
    Camshaft Gear Attachment
    3-bolt
    Computer-Controlled Compatible
    No
    Duration at 050 inch Lift
    260 int./270 exh., 258 int./268 exh.
    Exhaust Duration at 050 inch Lift
    270/268
    Exhaust Valve Lift with Factory Rocker Arm Ratio (
    0.621/0.621
    Grind Number
    311QS10
    Intake Duration at 050 inch Lift
    260/258
    Intake Valve Lift with Factory Rocker Arm Ratio (i
    0.637/0.637
    Quantity
    Sold individually
    Valve Lift with Factory Rocker Arm Ratio
    0.637 int./0.621 exh., 0.637 int./0.621 exh.
    Valve Springs Required
    Yes
    Lobe Separation (Deg)
    110.5/109.5
    Manufacturer's Part Number:
    12-477-44

    Comp Cams 4-Pattern Camshafts are hydraulic rollers designed to optimize valve events based on runner length and feature a large increase in both area under the curve and stability at high RPM

    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.

    The camshafts feature four different lobe patterns with one intake and exhaust design for outboard runners, and another intake and exhaust design for the inboard runners. While the four inboard cylinders are all the same grinds, the outboard exhaust openings are two degrees earlier, with outboard intake closings coming two degrees later. This is the first ever use of technology in street vehicles to balance air/fuel ratio per cylinder and can net you a possible 1000+ RPM over other hydraulic rollers and anywhere from 5-20+ horsepower peak to peak, depending on cylinder head flow.

    The 4-Pattern hydraulic roller cams are CNC-Machined from steel billet cores with cast iron distributor drive gears. The cams also feature a tight lobe separation for both excellent performance and a throaty sound.

    Note: Upgraded valve train components and aftermarket cylinder heads required.