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Old 07-08-2007, 08:33 AM   #2
Scooby Guru
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
2003 GGA MBP
12.9 / 105+


well simple form would just be two rectifying diodes to "sum" the two ecu coil driver outputs, but you'd have the voltage drop across the diode (typically ~0.7v) taking some of your spark energy.

it would probably be fine despite that fact.

other than that probably inconsequential issue, i can't see any reason why it would not work. however, i have never done it myself.


edit: if you try this out, consider using schottky diodes instead of normal PN diodes... the lower voltage drop (around half that of PN diodes, or ~0.3v) means higher efficiency and less waste and they are generally much "faster" than PN diodes. the only thing with schottkys is the fact that they are not available in high reverse voltages, and i don't know what kind of flyback you'll be seeing from the coil primaries.
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