02GF74
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 posted on 6/5/09 at 02:10 PM |
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halfway house to wasted spark igniton?
eventually I plan to install a megsa jolt but before that would like to fit the coil pack but have is triggered by distributor - badsially replace the
coil by the coil pack.
the idea is to feed 12 V to the distributor cap that then feeds the signal using the rotor arm to the appropriaqte coil pack.
has anything like this been tried?
will the low voltage, 12 V, ne enough to jump from rotor arm to the cap?
and what sort of trigger do the coil packs need? I wold expect they have the same or very similar dwell angle requirments as the coil so a driver
would be needed for them.
(and in case you are wondering why, I have the coil pack but not megajolt and would like to fit the coilpack & trigger wheel/pickup rather than
have them kicking about)
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blakep82
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| posted on 6/5/09 at 03:25 PM |
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i can't think why it wouldn't work, but i also can't think why you'd need it to. stick a HT lead in the top of the dizzy, plug
leads to the plugs and you're done. i can't think of any benefit in running a coil pack unless you've got some sort of ECU to take
care of the advance
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dhutch
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| posted on 6/5/09 at 03:42 PM |
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Surely what you want to do is fit the Coil pack with the Edis unit, and Vr sensor.
- Then use it in the limp-home fixed-advance mode?
Ulitmatly, not quite sure what your aiming for.
Im also planning to go down the MJ route eventually and have started amassing parts, but at the same time, see no point in starting to fit them (other
than the trig wheel and sensor bracket) untill i have the MJ unit.
Daniel
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SPYDER
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| posted on 6/5/09 at 04:09 PM |
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12v simply won't jump across the small gap between the rotor arm and distributor cap terminals. It would need actual physical contact to be
made.
Geoff.
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MikeRJ
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| posted on 6/5/09 at 05:49 PM |
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This is completely unworkable as Geoff says.
An electronic coil pack has very low primary resistance, so a constant dwell time is required in order to prevent excessive currents burning out the
coils. This means you can't drive them from a points type system that gives a constant dwell angle.
As mentioned, you need an EDIS unit. This will interface between your trigger wheel and coil pack and provide you with a constant 10 degree advance
(plus whatever advance you add with the trigger wheel/sensor location). This will allow you to get the engine running before you add your MegaJolt
unit.
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