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techtalk:ih:engctl01 [2020/05/03 14:17]
ixl2relax [Timing Advance]
techtalk:ih:engctl01 [2021/05/20 15:53] (current)
hippysmack [Spark Coil]
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 \\ \\
  
-====== ​VOES - Vacuum-Operated Electric Switch ​====== +====== ​Engine Control Related Components ​====== 
-. . . [[techtalk:​ih:​engctl01d#​voes_-_vacuum-operated_electric_switch|See more on the Voes Switch]] +===== Sub-Documents ===== 
 +  ​* [[techtalk:​ih:​engctl01d#​voes_-_vacuum-operated_electric_switch|See more on the Voes Switch]] 
 +  * [[techtalk:​ih:​engctl01#​voes_-_vacuum-operated_electric_switch|See Testing the VOES Operation]].  
 +  * [[techtalk:​ih:​engctl01f|Pics and information on Ironhead Coils and Bracketry]]. ​
  
 +\\
 +===== VOES - Vacuum-Operated Electric Switch =====
  
   * The computerized,​ microprocessor ignition module is programmed with two spark advance curves to meet varying engine loads. The system includes a vacuum operated electric switch (VOES). ((HD Service Bulletin #M-856 dated August 6, 1982))   * The computerized,​ microprocessor ignition module is programmed with two spark advance curves to meet varying engine loads. The system includes a vacuum operated electric switch (VOES). ((HD Service Bulletin #M-856 dated August 6, 1982))
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-=====Coil ======+===== Spark Coil =====
  
 **Coil Mix-up on 1973-1974 Models** **Coil Mix-up on 1973-1974 Models**
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 | 1980-1984 | 31609-80 | | 1980-1984 | 31609-80 |
 |1985 | 31614-83A | |1985 | 31614-83A |
 +
 +
  
 \\ \\
  
-====== Spark Plugs ======+===== Spark Plugs ===== 
 The HD plug number corresponds to the recommended heat range of the plug. \\  The HD plug number corresponds to the recommended heat range of the plug. \\ 
 HD 4 represents a spark plug with a heat range number of "​4"​. \\ HD 4 represents a spark plug with a heat range number of "​4"​. \\
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 ^  ^Ign. Retard ((57-69 HD Sportster FSM pg 3A-11)) ((70-78 HD Sportster FSM pg 3-1)) ((79-85 HD Sportster FSM pg 3-3))^Ign. Advance^ ^  ^Ign. Retard ((57-69 HD Sportster FSM pg 3A-11)) ((70-78 HD Sportster FSM pg 3-1)) ((79-85 HD Sportster FSM pg 3-3))^Ign. Advance^
 |**57-70**|15° (5/​64"​) BTDC)|45° (11/16” BTDC)| ​ |**57-70**|15° (5/​64"​) BTDC)|45° (11/16” BTDC)| ​
-|**71-72**|10° (1/32”) BTDC)|40° (17/32” BTDC)|+|**71-79**|10° (1/32”) BTDC)|40° (17/32” BTDC)
 +|Using Mechanical Advance mechanism = 30° range||| 
 +|Static Timing is set with Flywheel at Full Advance Mark|||
  
 ^  ^Ign. Retard^Idle Advance^Full Advance ((79-85 HD Sportster FSM pg 3-3))^ ^  ^Ign. Retard^Idle Advance^Full Advance ((79-85 HD Sportster FSM pg 3-3))^
 |**80-82**|8° (BTDC)|26° BTDC - (600-1600 RPM)|40° BTDC) - (above 1600 RPM)| |**80-82**|8° (BTDC)|26° BTDC - (600-1600 RPM)|40° BTDC) - (above 1600 RPM)|
 ^  ^Startup Advance^Fast Idle Advance^1800-2800 RPM ((79-85 Sportster FSM pg 3-3))^ ^  ^Startup Advance^Fast Idle Advance^1800-2800 RPM ((79-85 Sportster FSM pg 3-3))^
-|**83-85**|10° (before TDC)|40° (before TDC)|55° (before TDC| +|**83-85**|10° (before TDC)|40° (before TDC)|55° (before TDC)
 +|Using Electronic Module (computerized) allows calculating a wide range of advance spark timing|||| 
 +|Static Timing is set with Flywheel at TDC Mark - Used as a reference to calculate needed advance||||
 ==== Points Gap and Trigger Sensor Gap ==== ==== Points Gap and Trigger Sensor Gap ====
  
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 ===== Setting Ignition Timing ===== ===== Setting Ignition Timing =====
  
-  * During the 1969 model year, the MoCo began a new practice of setting ignition timing on Electra Glide, Servicar and Sportster models with the circuit breaker cam fully advanced instead of in the retarded position done in the past. Correct timing position was changed to 45° BTDC on Sportsters. Good engine performance requires correct advanced timing and this procedure eliminates any variations which may happen , in degrees of timing, due to a tolerance buildup in the parts. Retarded cam timing is not as critical since it is effective only at low speeds. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))+  * During the 1969 model year, the MoCo began a new practice of setting ignition timing on Electra Glide, Servicar and Sportster models with the circuit breaker cam plate fully advanced instead of in the retarded position done in the past. Correct timing position was changed to 45° BTDC on Sportsters. Good engine performance requires correct advanced timing and this procedure eliminates any variations which may happen , in degrees of timing, due to a tolerance buildup in the timing weight ​parts. Retarded cam timing is not as critical since it is effective only at low speeds. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
   * When checking / setting timing with a circuit tester or timing light (according to the FSM), ignition should occur when the single mark on the flywheel is in the center of the timing inspection hole in the crankcase. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))   * When checking / setting timing with a circuit tester or timing light (according to the FSM), ignition should occur when the single mark on the flywheel is in the center of the timing inspection hole in the crankcase. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
-    * Timing with a circuit tester: The cam must be turned clockwise with the flywheels locked down or held in position. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261)) +    * Timing with a circuit tester: The cam plate must be turned clockwise with the flywheels locked down or held in position. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261)) 
-    * Timing with a timing light: The engine must be run at 2,000 RPMs to be sure the cam is fully advanced. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261)) \\ +    * Timing with a timing light: The engine must be run at 2,000 RPMs to be sure the timing weights are fully advanced. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261)) \\ 
  
  
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 Paint the timing mark with bright pink fingernail polish (or something florescent). \\ Paint the timing mark with bright pink fingernail polish (or something florescent). \\
 Install the clear plug into the timing hole. \\ Install the clear plug into the timing hole. \\
-It should be very near but not touching the flywheel. (go in till you touch the wheel and back off a 1/8-1/4 turn).+It should be very near but not touching the flywheel. (go in until you touch the wheel and back off a 1/8-1/4 turn). 
 + 
 +\\ 
 + 
 +The OEM Timing Rotor used for electronic ignitions on 1980-82 models is 32401-80 (Silver color). 
 + 
 +For 1983-later, the OEM Timing Rotor is 32402-83 (Gold color). This later version is usually also used for aftermarket nosecone electronic ignitions installed in Ironhead models. 
 + 
 +|  Example of timing cup window positions per piston positions. (Crane HI-4 on 73 model) ((photos by vivisix of the XLFORUM, labeled by Hippysmack, http://​xlforum.net/​forums/​showthread.php?​t=323376&​page=3)) ​ || 
 +|{{:​techtalk:​ih:​engctl:​timing_window-piston_position_1_by_vivisix.jpg?​direct&​300|}}|{{:​techtalk:​ih:​engctl:​timing_window-piston_position_2_by_vivisix.jpg?​direct&​300|}}|