Page 8 of Valvetrain and Timing by Parts Pro

2006 parts pro master catalog high performance rocker arms accessories crane cams was founded in 1953 by harvey j crane jr when he became interested in hopping-up the flathead ford v-8 engine in his own car today over fifty years later crane is the one camshaft and valvetrain company that produces every camshaft in-house crane s commitment to quality control and engineering excellence is reflected in their innovative cam profiles world famous rocker arms and valvetrain components gold race extruded aluminum roller rocker arms crane aluminum rockers have been used in street machines street rods and tow vehicles delivering high mileage and trouble-free operation an added advantage for street operation is the friction reducing roller tip and roller bearing fulcrum as well as the unique inertia-lock locking nut that holds valve spacing longer than stock-type rockers sold individually or in sets description part no chevy sb 1.60 ratio 7/16 stud increased ratio w/enlarged stud dia clears 1.630 od spring 11755-16 v8 55-87 262-400 stock ratio with standard stud diameter 11750-16 v8 55-87 262-400 stock ratio with enlarged stud diameter 11752-16 chevy bb 396-502 1.70 ratio 7/16 stud stock ratio standard stud diameter 13750-16 chevy bb 396-502 91-00 454-502 gen v vi 1.80 ratio 7/16 stud increased ratio standard stud dia 13755-16 ford sb v8 s 62-94 221-302 351w 1.60 ratio 3/8 stud stock ratio standard stud diameter 36750-16 ford v8 s 69-82 351c 351m 400 boss 302 351 bb 68-93 370-460 1.73 ratio 7/16 stud stock ratio standard boss stud diameter 27750-16 nitro-carb steel rocker arms for race use where rules require stock type rockers crane cams nitro-carbtm rockers offer 3 to 5 times greater resistance to wear fatigue and fracture in high-stress areas nitro-carb rockers eliminate pushrod cup and fulcrum failures with wear resistance and surface hardness properties that are similar to ceramics nitro-carb rockers deliver the most accurate ratios of any similar steel rockers nitro-carb rockers are precision dieformed from heat treated steel most feature a long-slot design and come complete with oil-groove pivot balls and adjusting nuts description chevy chevy chevy chevy v8 v8 v8 v8 55-87 55-87 88-98 65-90 262-400 262-400 305-350 396-454 1.5 1.6 1.5 1.7 ratio ratio ratio ratio extra long slot 3/8 stud extra long slot 3/8 stud self aligning 3/8 stud long slot 7/16 stud sportsman series shaft-mount roller rockers part no 11801c-16 11802c-16 10800c-16 13801c-16 long slot stamped rockers stock design with better material and heat treat supplied with long slot or extra long slot to provide more travel for increased valve lift economically priced for budget engine rebuild stock design uses ball or sled type fulcrum with high amount of friction roller tip helps to eliminate friction and side loading of valve stem extra long slot accommodates increased valve lift highly accurate modern manufacturing techniques insure correct rocker ratio made from stronger alloy with improved heat treat most economically priced roller tip rocker on the market still relies on a ball fulcrum which creates high friction applications listed not for use with valve springs over 1.520 o.d description chevy 90° v6 78-87 200-262 chevy v8 55-87 262-400 stock ratio w/extra long slot increased ratio with extra long slot 8 ea of 1.50 and 1.60 ratio w/extra long slot includes kool nuts chevy v8 65-90 396-454 502 stock ratio with extra long slot · increases horsepower torque rpm and throttle response · roller tip for accurate valve stem tip tracking · machined steel valve lash adjusters · cnc-machined extruded billet heat-treated gold anodized aluminum main body · machined steel micro polished main shafts · each shaft end supported by steel stands · stock oiling for maximum lubrication · comes as complete kit includes shafts for easy bolt-on installation part no 44808-1 ford v-8 289-302-351w stud mounted rocker arm cylinder heads complete kit with 1.6 intake and 1.6 exhaust ratio rocker arms including all mounting hardware part no 11809-1 sb chevy part no 11801-16 11802-16 11803-16 13801-16 rocker arm adjusting nuts .550 minimum rocker slot width description 3/8 -24 thread 7/16 -20 thread part no 99788-16 99790-16 steel roller-tip rocker arms made from the highest quality alloy steel these rockers are precisely formed using the latest die-forming technology the body uses a long-slot for high lift cams is heat-treated hardened and fitted with a steel roller tip grooved antigall heat treated pivot balls and self-locking nuts are included 16 per set part no 11806-16 chevy v8 262-400 .150 ratio 3/8 stud diameter stock ratio w/extra long slot valve lash caps 11/32 dia valve lash caps .162 tall .060 thick manufactured from 8620 steel alloy with a black oxide finish part no 99421-16 some parts are not legal for sale or use in california on any pollution controlled motor vehicle 73

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