9.38 9 Andrews Cams for Evolution Big Twin Models Unlock the hidden performance potential of your Evolution Big Twin with this selection of popular offerings from Andrews. Cams Andrews ‘EV5’ For engines that have been mildly stroked or had head work done. Stock hydraulics are recommended with stock spring travel set to .560" minimum. Makes excellent power from 2500-6500 RPM. 24258 Andrews EV5 cam Andrews ‘EV51’ Fast open and close ramps to generate good high-RPM power without sacrificing low end torque, and longer duration for modified street engines with hydraulic lifters. Power range from 3,000-6,500 RPM. 24319 Andrews EV51 cam Andrews ‘EV72’ Designed for 92 inch and larger street motors. Use with performance springs and titanium collars. Broad power band from 2,800-6,000 RPM. 24309 RevTech EV-72 cam for 110" & 100" 4x4 motor. Andrews ‘EV79’ High-compression engines of 92 inches or more will run cooler at sustained high RPMs. We recommend using the stock hydraulic lifters with Andrews springs and collars up to 7000 RPM. 24192 Andrews EV79 cam Andrews ‘EV88’ A high-lift drag cam for 100"+ motors with compression ratios of at least 10.5:1. Provides a wide torque band in motors for all models 84-99, and may be used with the stock hydraulic lifters which are capable of 6,000+ RPM. Andrews ‘EV38’ The newest grind for Evolution Big Twins is perfect for lighter street driven bikes. This combination grind offers great midrange to top end power. Longer exhaust duration helps lower oil temp for longer engine life. Works fine with stock valve springs for easy bolt-in installation. 23909 Andrews EV38 cam Andrews ‘EV23’ Bolt-in cam for heavier touring bikes and high geared bikes with 65 tooth rear pulleys. More power from 1500 to 6000 RPM. Works well at high altitude. 23899 Andrews EV23 cam Andrews ‘EV13’ Bolt-in cam for street or touring use with more mid-range and upper end power than the original EV1. similar to stock 1988 and later OEM cams. Especially effective in reducing oil temperature in hot weather. 24220 Andrews EV13 cam Andrews ‘EV27’ Bolt-in street cam with broad torque range and fast open and close ramps. Pulls from 1,500-6,000 RPM. 24307 Andrews EV27 cam Andrews ‘EV3’ Bolt-in cam for FXR and Softail models. Lots more mid-range power. Idle smoothness unaffected. This is a 6000+ RPM cam for stock springs and hydraulic lifters. Requires no head work to install. 24257 Andrews EV3 cam Andrews ‘EV46’ A bolt-in cam with fast open and close ramps in a grind similar to the EV3, but produces higher static compression pressure permitting 6000+ RPM with stock heads and hydraulic lifters. 24320 Andrews EV46 cam that have headwork. This cam is capable of 6500+ RPM, but requires hi-lift valve springs and collars CC #24198, #24199). 23908 Andrews EV88 cam Use the chart below to determine the specifications for the cam you are interested in purchasing. Duration Valve Grind Open Close @ .053 Lift EV38 Intake 21° 37° 238° .495 Exhaust 52° 20° 252° .500 EV23 Intake 10° 30° 220° .498 Exhaust 40° 8° 228° .498 EV13 Intake 15° 31° 226° .485 Exhaust 45° 13° 238° .495 EV27 Intake 20° 36° 236° .495 Exhaust 44° 16° 240° .495 EV3 Intake 21° 37° 238° .495 Exhaust 43° 15° 238° .495 EV46 Intake 25° 41° 246° .495 Exhaust 49° 17° 246° .495 EV5 Intake 28° 44° 252° .530 Exhaust 52° 20° 252° .530 EV51 Intake 28° 44° 252° .510 Exhaust 54° 22° 256° .510 EV59 Intake 28° 48° 256° .560 Exhaust 56° 24° 260° .560 EV72 Intake 30° 54° 264° .560 Exhaust 60° 28° 268° .560 EV79 Intake 31° 55° 266° .560 Exhaust 64° 32° 276° .550 EV81 Intake 32° 60° 272° .610 Exhaust 66° 30° 276° .610 EV88 Intake 34° 70° 284° .680 Exhaust 76° 32° 288° .680 Note: Late 84-E86 Evolution engines require their pistons to be notched to obtain the necessary valve-to-piston clearance.
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