- Barnyard BOb - a écrit:


http://www.mwignition.com) = no address for host

Sorry http://www.mwignitions.com

other URLs
http://www.cafefoundation.org/aprs/ignition1.pdf
http://www.cafefoundation.org/aprs/ignition2.pdf
http://www.cafefoundation.org/aprs/ignition3.pdf

I would love to build what you have.
Any way to get FULL details?

From the gear:
1-)an old Slick magneto (4000 serie) with impulse.
I remove all things I can (coil, point, ....)
I drill 8mm holes in the distributor cap and rear plate
I remove the distributor arm inside the distributor gear
I cut a target steel (1,2mm thick or 3/64") and glue it inside the
distributor gear. This target give two pulses for one gear turn, or
two crackshaft turns. I get one pulse each crackshaft turn for one
sensor.

2-) two magnetic sensors from RScomponents
pepperl+fuchs NBB1.5-8GM50-E0
The sensors are bolts on the rear plate (1mm gap between target and
sensor). Their positions are 3 and 4 but may be 4&2, 2&1, 1&3.

3-) CDI box PRO12 and coils from M&W ignitions. The coils are bolt
on the engine case, the CDI box on firewall. You may purchase same
box from MOTEC. This box provide input and output for a
distributorless 4 cylinders engine, a 6 cylinders box is available.

4-) HT wires: automotive "spiral" type , plug cap NGK 5000 ohm
resistor, plug NGK BR8EV. Aircaftsrpuce plug adapter (PN 08-06753).

4-) wiring all together (10 wires), a switch for -12V ON wire
(another +12V wire wthout switch).



The spark sequence is 1&2, 3&4, 1&2, ....... No distributor, no EMI
noise, iddle very smooth and very easy start à 0°C (32°F).
The cost around one half of a new magneto.

The fisrt test is with plugs outside of the engine, turning propeller
with hands and checking the #1 spark position and when the spack is
comming (LED on or LED off)
For advance setting, the sensors have LED in their back. When LED ON,
the advance is OK.

I have two spare holes in the magneto for a second CDI set.



Please, send me your Email for target photo.

By
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Philippe Vessaire Ò¿Ó¬