Page 8 of Valvetrain and Timing 2008 by Parts Pro

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 power products for ls series cars-trucks chevrolet v-8 97-07 5.7l 346 ls1/ls2/ls6 also 99-07 vortec 4800 5300 6000 hydraulic roller camshafts rpm power range idle4500 10006000 15006000 30006500 30006500 35006500 cam part number 1449545 lifters deg duration advt deg part 050 duration number int/exh int/exh 144530-16a 200 262 144535-16b 208 270 144530-16a 144535-16b 144530-16a 144535-16b 144530-16a 144535-16b 144530-16a 144535-16b 144530-16a 144535-16b 210 218 216 224 220 220 224 224 228 232 272 280 278 286 282 282 286 286 290 294 degrees lobe sep 115 open/close 050 cam lift int/exh 14 34 40 12 5 35 43 5 2 38 52 8 3 37 47 7 3 41 51 7 7 41 53 1 lash hot int/exh .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 gross lift int/exh .502 .502 .531 .531 .551 .551 .551 .551 .551 .551 .600 .600 cam facts big torque for trucks use w/stock or mild engine mods best for 4800 or 5300 vortec engines smooth idle towing up to 6,000 lbs can use stock valve springs perf cam for cars or trucks use w/stock or mild engine mods use zcam in 5.3-5.7-6.0l good idle slight chop must use 144832-16 valve hr-210/3121-2s-12 2a springs auto or manual trans good for supercharger w/powermax tuner perf cam for cars or trucks stock or w/mild engine mods use in 5300zcam 5.7-6000 engines good idle slight chop must use 144832-16 valve springs hr-216/3241-2s-15 auto or manual trans good for supercharger w/powermax tuner perf cam for cars stock or w/mild engine mods use in 6000 engine zcam good idle slight chop must use 144832-16 valve springs auto or hr-220/3241-12 manual trans good for powermax tuner perf cam for cars stock or w/mild engine mods use in 5.7-6000 engs zcam good idle slight chop must use 144832-16 valve springs auto or hr-224/3241-14 manual trans good for powermax tuner perf cam for cars or trucks stock or w/mild engine mods use in 5300zcam 5.7-6000 engines rough idle slight chop must use 144832-16 valve springs hr-228/353-2s-12 auto or man trans good for powermax tuner a for use with standard gm alignment bars and standard base circle camshafts cam series grind number zcam hr-200/2951-2s-15 1a 1449571 112 1449561 115 1449581 112 1449591 114 1449601 112 b for use with standard gm alignment bars long travel design for up to .670 valve lift and reduced base circle camshafts full-roller rockers for ls1 chevrolet v-8 97-07 ls1/ls6 5.7l vortec 4800 5300 6000 pro series ls1 shaft mount rocker arm kit · quick-lift rocker arm geometry opens valves faster providing better cylinder filling · polymer matrix composite bearings eliminate bearing inertia reducing friction · premium aluminum alloy rocker arm body application 97-07 ls1/ls2 5.7l also vortec 4800/5300/6000 ratio 1.70 1.80 part no 144809-1 144808-1 application ratio stud dia part no stock ratio standard stud diameter 1.70 3/8 144750a-16a stock ratio standard stud diameter 1.70 3/8 144750-16a complete installation kit including studs guideplates pushrods increased ratio standard stud diameter 1.80 3/8 144759a-16a increased ratio standard stud diameter 1.80 3/8 144759-16a complete installation kit including studs guideplates pushrods a for use with standard valve covers no machining or spacers required power products for ford-mercury v-8 91-05 4.6-5.4 liter sohc 2 valve hydraulic roller follower camshafts cam series grind number zcam hr-218/500-2-16 zcam hr-228/500-2s-12 zcam hr-212/550-2s-15 zcam hr-218/550-2-16 zcam hr-228/550-2s-12 rpm power range 20005000 24006200 16005500 20005800 24006200 cam part number 379501a deg duration advt deg 050 duration int/exh int/exh 218 254 228 264 228 264 234 270 212 248 218 254 218 254 228 264 228 264 234 270 degrees lobe sep 116 050 cam lift int/exh 2 40 55 7 7 41 54 0 4 36 49 11 2 40 55 7 7 41 54 0 cam facts good low end and mild range torque and horsepower good idle daily usage off road mild supercharged mild nitrous 2200-2600 cruise rpm 112 good mid range torque and horsepower fair idle performance usage 379511a bracket racing computer upgrades required 2600-3000 cruise rpm 115 excellent low end torque and horsepower smooth idle daily usage 379601b towing 1600-2200 cruise rpm good low end and mid range torque and horsepower good idle daily 379611b 116 usage off road mild supercharged mild nitrous 2200-2600 cruise rpm b 112 good mid range torque and horsepower fair idle performance usage 379621 bracket racing auto w/2000 converter computer upgrades required 2600-3000 cruise rpm 236 272 114 6 50 .000 .600 good mid range to upper rpm torque and horsepower rough idle zcam 2800379631b performance usage bracket racing auto w/2500 converter increased hr-236/600-2s-14 6600 242 278 57 5 .000 .600 compression ratio required computer upgrades required 2800-3400 cruise rpm also mild supercharged or nitrous note check valve to piston clearance rpm range shown is for average usage these cam profiles will rpm higher depending upon application important note 1997 and later applications will require ford bolt-on gears ford part number f8az-6256-aa for the right gear and f8az-6256-ba for the left gear two each of the tf72-6279-aa bolts f1az-6278-a washers and f3az-6265-a spacers will also be required a b open/close lash hot int/exh .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 gross lift int/exh .500 .500 .500 .500 .550 .550 .550 .550 .550 .550 pair of camshafts for 1992 and later engines with standard cylinder heads 1997 and later applications will require ford bolt-on gears ford part number f8az-6256-aa for the right gear and f8az-6256-ba for the left gear pair of camshafts for 1999 and later engines with power improvement cylinder heads requires ford bolt-on gears ford part number f8az-6256-aa for the right gear and f8az-6256-ba for the left gear some parts are not legal for sale or use in california on any pollution controlled motor vehicle 135

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