ENGINE SECTION RED PART NUMBERS INDICATE NEW PARTS 6-65 1 2 3 4 5 6 7 8 9 10 11 CONTENTS ELECTRICAL FRAME FRONT END CONTROL WHEEL ENGINE DRIVE TRAIN FUEL EXHAUST GENERAL REFERENCE Cams Timing Duration Valve Lift Application (1) (1) Grind Shovel Pan Year Part # Stock “H” grind Harley-Davidson® front cylinder -6/46 220 Stock .390” .412” –– –– timing listed for comparison. 44/20 244 H .390” .412” –– –– Stock “H” grind Harley-Davidson® rear cylinder 14/38 232 Stock .390” .412” –– –– timing listed for comparison. 44/20 244 H .390” .412” –– –– Mild Street - Panheads and Shovelheads, smooth 21/41 242 .405” .425” 1948/1969 66800 idle, more power through RPM range. Bolts in with 41/21 242 J .405” .425” 1970/Early 1977 66801 no head work. .405 .425” Late 1977/1984 66802 Street/Drags - Bolts into Shovelhead (except 19/43 242 .450” .470” 1948/1969 66803 1980/1981) with no head work. More mid range 50/18 248 A2 .450” .470” 1970/Early 1977 66804 and high end power. Idle smoothness unaffected. .450” .470” Late 1977/1984 66805 Street/Drags - Much more mid range and high end 26/50 256 .485” .507” 1948/1969 66806 power. Idle smoothness unaffected. The cam for modified 53/25 258 B2 .485” .507” 1970/Early 1977 66807 74ci/80ci and small strokers. Spring spacing required. .485” .507” Late 1977/1984 66808 Hydraulic version of a “B” cam. Usually a bolt-in spring 24/52 256 BH .450” .470” 1948/1969 66812 spacing may be required on Shovelheads 1980/1981. 52/24 256 .450” .470” 1970/Early 1977 66813 .450” .470” Late 1977/1984 66811 Hotter version of a “B” grind. Great street cam 29/53 262 7 .510” .535” Late 1977/1984 66814 especially for 84ci/88ci strokers. Maximum torque 59/27 266 .510” .535” available from 2500-6500 RPM. Best cam made for big street engines. Strokers from 37/61 278 C .525” .550” 1948/1969 66818 84 to 96 inches will really turn on with this cam. 61/37 278 .525” .550” 1970/Early 1977 66816 Broad torque band from 2000-7000+ RPM. .525” .550” Late 1977/1984 66817 CAMS WITH GEAR FOR PANHEAD & SHOVELHEAD Panhead and Shovelhead 1948/1984 (1) Timing and Duration measured at .053” cam lift. Note: Rocker arm ratios are as follows, Panhead 1.5:1, Shovelhead 1.43:1. 1980/1981 Shovelhead motors with anything higher than a valve lift of .430” will require valve guide to top spring collar clearancing. Whether you want a better street cam for a stock motor, a big lift cam for a hotrod bike, or something in between, then these Andrews Cams are what you are looking for. All of these cams are computer designed and precision ground from alloy steel billet. Note: 1948/1957 Panhead models require engine case machining for installation of a 1958/1984 style cam shaft needle bearing. Motorcycles which are manufactured for on-road use have been pollution controlled since the 1979 model year. Starting the 1979 model year, add-on and modified parts for on-road motorcycles have been required to receive an anti-tampering exemption.
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