JIMS, 1364G cam .660" lift for Evo Big Twin

616 Speedo Seats & Luggage- racks Frame Chassis Suspension Forktubes Wheels Brake Fenders Gastanks Motorparts Gaskets Intake Transmission & Driveline Exhaust Electrical & Lights Handlebars, Cables & Mirrors Oil tanks Oil & Chemicals Fasteners Wind- shields Forward controls, Footpegs Miscellaneous MOTORPARTS - LOWER END 10 84-99 EVO CAMSHAFTS S&S CAMSHAFT SPECIFICATION CHART Intake° Exhaust° Duration° Valve Lift Valve Lift TDC Open/Close Open/Close In/Ex In/Ex In/Ex OES* 2/34 36/4 216/220 .475" .060"/.060" 490LR 12/34 41/15 226/236 .490" .146"/.157" 508 11/26 50/06 217/236 .508" .141"/.110" 510V 20/38 52/20 238/252 .510" .187"/.178" 520 0/40 50/2 220/232 .520" .086"/.094" 561 32/40 50/26 252/256 .560" .252/.210" 585V 20/45 60/20 245/260 .585" .186"/.180" 600 20/55 60/20 255/260 .600" .218"/.198" 631 34/61 66/29 275/276 .630" .281"/.221" 640 25/60 65/20 265/265 .640" .222"/.192" Timing and duration measured at zero lash and .053" tappet lift off base circle. To avoid coil bind, allow min. .030" more free valve travel than the max. valve lift that is mentioned. To achieve adequate valve spring clearance, several higher lift top collars are available which require no machining. *OES = Original Equipment Specification Information provided by S&S Cycle Inc. 531980 S&S 84-99 EVO CAMSHAFTS S&S cams are designed and made by the company with most Harley High-Per- formance experience in the world. Extensive dyno & street testing by S&S ensure you of a cam with 'Proven Performance' for the best obtainable real-world results. S&S OES CAM OES = Original Equipment Specification. This is a direct replacement bolt-in camshaft and offers the stock timing specifications of the H-D ® L-grind cam. 532585 S&S OES .475" lift S&S 490LR CAM Bolt-in. Designed for a broad power range impro- vement Good for heavy bikes and trailer towing. Increased low and mid range performance. Works well with stock compression ratio, exhaust and valve train. Idle to 5000 RPM. 532586 S&S 490LR .490" lift S&S 508 CAM Best bolt-in cam for stock, or close to stock 80" (1340cc) engines, with less then 10:1 CR. Quiet valve train. Excellent low/mid range torque for touring and 2-up riding. 531980 S&S 508 .508" lift S&S 510V CAM Bolt-in cam for 80" (1340cc) to 93" engines with stock or ported heads. Up to 10:1 CR. With a stock engine, aftermarket slip-on mufflers and a Super E carb a 10HP power gain was realized at 5500 RPM. 503609 S&S 510V .510" lift S&S 520 CAM .520" valve lift. Up to 96" engine with 8.5 to 10:1 CR. Short duration & overlap reduce emissions of unburned carbohydrates and makes good low and mid-range power. Good for dressers and riding double. Used in many emission compliant engines. Requires high-lift springs and normal clearance checks. 1000- 4500 RPM. 503596 S&S 520 .520" lift S&S 561 CAM 88" to 96" engines with 9.5:1 to 10.5:1 compression ratio. Provides strong midrange power. 3000-5500 rpm. Requires hydraulic tappets and spring spacing. 503562 S&S 561 .560" lift S&S 585V CAM For 80" to 96" engines 10:1 to 10.5:1 CR. Larger engines with 9.5:1 to 10:1 CR. Provides streetable combination of low end torque and top end horsepo- wer. 3500-6000 RPM. 503603 S&S 585 .585" lift S&S 600 CAM Best cam for 4" bore engines with 9.5 to 10.5:1 CR. Originally designed for the limited S&S 110" Anni- versary engine. Good power across the 3500-6000 RPM range. 503598 S&S 600. .600" lift S&S 631 CAM .630" valve lift. For high RPM street/race applications with 11:1 and higher compression ratios. Great per- formance cam but hard on valve train components. Can also be used with solid lifters. Valve spring spac- ing and other normal clearancing checks required. 4500–6500 rpm. 503599 S&S 631 .630" lift S&S 640 CAM Big inch engines with 10.5/11.5:1 CR. Smaller engines with 11:1 to 12:1 CR. With lower TDC lifts, faster ramps and shorter duration it builds higher cyl. pressure and requires less CR and offers a more linear power de- livery as the 631. Supplied with the S&S 124" SSW+ engines. 3000-6000 RPM. 503601 S&S 640 .640" lift JIMS, CAMSHAFTS Designed to fit 84-99 style Evo Big Twin engines. 1361G cam .500" lift For 80" engines with stock heads. Bolt-in cam with a broad useable torque band that comes early and pulls throughout the 2000-6000 RPM range. Works with stock springs. 978589 JIMS .500" lift 1362G cam .565" lift For 89"-113" engines with headwork and 9.75:1CR or higher. Requires free flowing intake and mufflers. 3000- 6000+ RPM range. Performance valve springs required. 978591 JIMS .565" lift 1363G cam .600" lift For 93" to 120" engines with maximum flow heads and high compression. Similar to 1362G, but with more top-end potential. Requires free flowing intake and mufflers. 2800-6000+ RPM range. Performance valve springs required. 978593 JIMS .600" lift 1364G cam .660" lift For racing/strip Big Inch engines. Extensive head & piston modification required. 978595 JIMS .660" lift 978589 In some cases engines with perfor- mance cams & stock mufflers wi l l absolutely not run satisfactory. Any performance engine needs to breath. It is recommended to open-up the stock restricted muffler or use a free flowing aftermarket muffler. A free-flowing air cleaner is recommended and the fuel system may need adjustment. tech-tip 53 JIMS CAMSHAFT SPECIFICATION CHART Intake° Exhaust° Duration° Valve Lift Cam Lobe Open/Close Open/Close In/Ex In/Ex sep.angle 1361G 16/38 50/14 234/244 .500"/.500" 104.5 1362G 24/50 56/22 254/258 .565"/.565" 105 1363G 28/56 68/24 264/272 .600"/.600" 108 1364G 31/59 72/24 270/276 .660"/.660" 109 Information provided by JIMS Machining. EVO BIG TWIN