[[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] ====== REF: Engine Conversions & Upgrades ====== ====== Performance Upgrades ====== Typical Staged Sportster Engine Upgrades ((Freud- XLFORUM)) ===== Paying Taxes ===== Stage 0: Stock = HP- 40 for 883, HP- 50 for 1200 (average) Stage 0.5 (also known as “The Harley Tax”)= HP- 50 for 883, HP- 60 for factory 1200 (Example)((Freud-http://xlforum.net/forums/showthread.php?t=1606840)) * Stock plus: * High flow air Cleaner OR * SE Slip-On Mufflers or equivalent ===== Stage 1 Upgrades ===== Quote: Stage 1 and Harley Tax are synonims and include Pipes, Air Filter and Carburetor re-jetting/ ECU re-mapping ((Freud-http://xlforum.net/forums/showthread.php?t=1606840)) * Stage 1.0 = HP- 60 for 883/1200, HP- 65-70 for factory 1200 (Example)((Freud-https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/147938-consensus-harley-tax-stages-1-2-and-3?t=1606840)) * High Flow Air Cleaner AND * High Flow Exhaust AND * Fuel/Air ratio adjustment : Jetting for carburetor, modify fuel tables in ecm with EFI bikes. * * === Known Stage 1 883 configurations === This is just examples of what has worked on some bikes. Each motor may be different in it's own unique way. 883 Engines: * Carbureted / Year Model / Jetting / Mods: * . * . * . * . * EFI:/ Year Model / Jetting / Mods: * Screamin' Eagle Air Cleaner/ Screamin' Eagle Slip on exhaust * . * . * . * . === Known Stage 1 1200 configurations === 1200 Engines: * Carbureted / Year Model / Mods: * . * . * . * . * EFI:/ Year Model / Mods: * . * . * . * . ===== Stage 1.5 Upgrades ===== Stage 1.5= HP-65 for 883/1200, HP- 70 for factory 1200 (Example)((Freud-https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/147938-consensus-harley-tax-stages-1-2-and-3?t=1606840)) * Stage 1 plus: * Andrews N2 cams (mild) * * * ===== Stage 2 Upgrades ===== Quote: Stage II: Stage I plus cam upgrades ((rocketmangb- http://xlforum.net/forums/showthread.php?t=1606840)) Quote: Stage II: Camshaft, Larger displacement, Higher compression ((Freud-https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/147938-consensus-harley-tax-stages-1-2-and-3?t=1606840)) * Stage 2: Stage 1.5 plus: (Example)((Freud-https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/147938-consensus-harley-tax-stages-1-2-and-3?t=1606840)) * Andrews N4, N8, or SE bolt-in cams instead of N2 * SE S1 Lightning or other bolt-on +/- 10:1 heads * HP=75 * Options: * 2 into 1 header system, add +/- 7 hp * SE carb (or equivalent), add +/- 3 hp * XR750 (or other) valve springs, no gain * Stage 2.5: Stage 2 plus * Professionally ported 10:1 or higher heads * Matching (to head) domed pistons * XR750 valve springs or SE cam kit * 2 into 1 header system * SE,S&S Super E, or Mikuni HSR42 carb * HP=90+ * Options: * big valves (big twin size), add +/- 5 hp * * * ===== Stage 3 Upgrades ===== Quote:Stage III: Its on like Donkey Kong ! ((rocketmangb- https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/147938-consensus-harley-tax-stages-1-2-and-3?t=1606840)) Quote: Stage III: Boring and/or Headwork and/or Forced Induction and/or Nitrous ((Freud-http://xlforum.net/forums/showthread.php?t=1606840)) Stage 3 = HP- ???? * Stage 2.5 plus:(Example)((Freud-https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/147938-consensus-harley-tax-stages-1-2-and-3?t=1606840)) * Big-bore cylinders and pistons and/or * Stroker kit and/or * Nitrous injection and/or * Supercharging * Options: many * * * ====== Useful Tips Formulas ====== ===== Formulas ===== * Displacement: pi x (radius squared) x height (example: 4 inch bore, 4 inch stroke) = 3.14159 x (2 squared) x 4 = 50.265ci of displacement per cylinder * Cubic Centimeters to Cubic Inches: cc ÷ (2.54 cubed) (example: 1200cc) = 1200 ÷ (2.54 cubed) = 73.23ci * Cubic Inches to Cubic Centimeters: ci x (2.54 cubed) (example: 100ci) = 100 x (2.54 cubed) = 1638.7cc * Horsepower: (torque x rpm) ÷ 5252 (example: 80 ft-lbs at 4000 rpm) = (80 x 4000) ÷ 5252 = 60.93hp * Torque: (horsepower x 5252) / rpm (example: 100hp at 4000 rpm) = (100 x 5252) ÷ 4000 = 80 x 4000) / 5252 = 131 ft-lbs. ===== Building and Performance Tips ===== * [[http://www.hammerperf.com/techtips.shtml|Hammer Performance Tech Tips]] * [[http://nrhsperformance.com/tech.shtml|NRHS Performance Tech Tips]] * [[http://www.floheadworks.com/Departments/articles.htm|Flo Headworks Tech Tips]] \\ [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]]