Ignition choices for BME
10-19-2003 | 06:38 AM
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From: concord, NC
Ignition choices for BME
The question has been asked whether Falkon, DA, 3W or other ignitions may be used with the BME 110. The answer to these questions is simply. . yes. Though BME recommends utilizing the current CH ignition that BME supplies with their engines, it is possible to adapt other forms and makes of ignition to the engines.
For Hall effect triggered ignitions, such as Vlach or Falkon, the installed Hall effect sensor may prove capable of triggering those ignitions types. For Da and 3W style ignitions, the end-user will have to adapt the pickup to the crankshaft, ensuring proper diameter and speed of the "adapter ring" on the front of the crankshaft to achieve proper speed of the magnet, and thus proper timing advance as the engine's speed increases.
For the DA and 3W style ignitions, it is best to set the initial advance at about 12-14 degrees, since the timing will increase to about 28 degrees at full advance. For Vlach and Falkon style ignitions, "reverse" timing the initial ignition point is necessary to ensure that at full advance the timing does not increase past about 26-30 degrees BTDC. Contact the distributor of these ignitions for information about the advance curve, then set the pickup and magnet to trigger at the proper point to ensure correct full-throttle maximum advance (again. . 26-30 degrees).
Remember, with the 110, the cap must match the CM6 type plug.
BME in now way encourages or promotes these modifications to its current setup. The supplied CH ignition is recommended for proper operation of the engine.
Of note, older CH ignitions with the "ground strap" leads can be modified for the 110 using DA or 3W style plug caps, and have proven to be reliable and trouble free if the modification is properly made. Please check with BME and CH ignitions before any modifications are made to the CH ignition, and contact BME for further information on timing or ignition issues.
Kris Welter
For Hall effect triggered ignitions, such as Vlach or Falkon, the installed Hall effect sensor may prove capable of triggering those ignitions types. For Da and 3W style ignitions, the end-user will have to adapt the pickup to the crankshaft, ensuring proper diameter and speed of the "adapter ring" on the front of the crankshaft to achieve proper speed of the magnet, and thus proper timing advance as the engine's speed increases.
For the DA and 3W style ignitions, it is best to set the initial advance at about 12-14 degrees, since the timing will increase to about 28 degrees at full advance. For Vlach and Falkon style ignitions, "reverse" timing the initial ignition point is necessary to ensure that at full advance the timing does not increase past about 26-30 degrees BTDC. Contact the distributor of these ignitions for information about the advance curve, then set the pickup and magnet to trigger at the proper point to ensure correct full-throttle maximum advance (again. . 26-30 degrees).
Remember, with the 110, the cap must match the CM6 type plug.
BME in now way encourages or promotes these modifications to its current setup. The supplied CH ignition is recommended for proper operation of the engine.
Of note, older CH ignitions with the "ground strap" leads can be modified for the 110 using DA or 3W style plug caps, and have proven to be reliable and trouble free if the modification is properly made. Please check with BME and CH ignitions before any modifications are made to the CH ignition, and contact BME for further information on timing or ignition issues.
Kris Welter
10-19-2003 | 10:13 AM
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RE: Ignition choices for BME
Sounds pretty technical....
The "adapter ring" is not on the crank, it's the part that bolts onto the crankcase..
The speed of the magnet relative to the engine speed can't be changed, it rotates in the hub..
Bottom line ...You put the "adapter ring" in the right place on the crankcase and the ignition works..[8D]
The "adapter ring" is not on the crank, it's the part that bolts onto the crankcase..
The speed of the magnet relative to the engine speed can't be changed, it rotates in the hub..
Bottom line ...You put the "adapter ring" in the right place on the crankcase and the ignition works..[8D]
10-19-2003 | 12:09 PM
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From: Riverton,
WY
RE: Ignition choices for BME
.. The 3-W/DA ignitions trigger off ot the reverse side of the magnet that CH triggers from. If you plan on using one you you must use a reversed magnet of a larger dia.
