I decided to modify my engine's distributor to
accommodate a dual ignition system. A few
years ago, Paul Messinger wrote an instruction manual for converting a
distributor for dual ignition. This manual entitled "The Dual
Pickup Modification for the Subaru EA-81 ND Distributor and Related HI
distributor - Instruction Manual" is freely available from Paul (firstname.lastname@example.org").
He also makes a kit for the conversion.
Although I could have purchased a second pickup coil to put in my
distributor, I did not need that as I had two Nippodenso distributors on
hand (and one Hitachi). I got that second ND distributor on eBay a
while ago for something like $10US.
When I first installed this
combination (June or July 2003), I found it was difficult to start the
engine. The engine starter was not turning fast enough to get the
ignition module to detect the pulses from the pickups.... I thought it was
because of my flywheel/starter combination. Later, in April
2004, I found someone using the ND/GM system with the same engine as I
have... so I decided to try again and it worked! I figure my
2003 attempts failed because of too long battery leads (10 feet of 4AWG
booster cables and 15 feet of cables in the aircraft (from the back of the
and testing of the Nippodenso dual dizzy
I was getting difficulties with the ND/GM setup, I
consulted the Airsoob discussion forum and a few
people suggested I try to make a different conversion using Mitsubishi
integrated pickups/control modules. I discussed this with Paul and I
sent him a Hyundai dizzy for testing on his distributor machine.
Paul then made a conversion kit that I used to convert a Subaru Hitachi
distributor using two Mitsubishi control modules. I ended up not
using the system since I got the ND/GM HEI to work.
of the Hitachi/Mitsubishi dual dizzy