Cut a 5″ piece of hookup wire (22ga is fine) and strip just a 1/8″ or so.Tin each end of the resistor with a bit of solder.Get a 330 ohm 1/4w resistor and cut the leads down to about 1/2″ at each end.Cut out R57 if fitted (this won’t be there on my units though).(Only needed when triggering from the – terminal of the coil, which you are not) Remove D1 and jumper it, or just install a jumper wire across it’s leads.For a V3.0 board, jumper IGBTOUT to IGN to send to IGBT ignition coil driver signal out of pin 36 on the DB37.Flash ECU with MSnS-E version 024s9 or later.For a V3.57 board, put JP1 in the 2-3 position and J1 in the 1-2 position.For a V3.0 board, connect TachSelect to OptoIn, TSEL to OptoOut.Make sure it is set for Hall / optical input.If you are building your unit up from a kit you can implement these changes during assembly. This is assuming you are starting with an ECU built up like I build my assembled MS130-C MegaSquirt-I PCB3.0 units.Using the MS-I PCBv3 or V3.57 with MS1/Extra firmware These modifications use a BIP373 ignition transistor, sold separately from the kit. You can use an MS3 with the MS2 mods shown here, although to take full advantage of the MS3’s capabilities, it is better to use our L28ET trigger disc upgrade to allow sequential injection.
It’s choice time, MS1 with MS1/Extra firmware, MS2, or MS3.
It needs slightly different mods and settings see this article for how to set it up. Note – want to trigger a distributorless ignition or sequential injection from the stock distributor? We now offer a bolt in trigger disc that gives you that option. There is already a great write-up by ‘mobythevan’ at on how to MegaSquirt the 280zx turbo using the MegaSquirt-I PCB2.2 ECU, combined with an HEI-4 module, but what about the more recently released PCB3 ECU? Certainly you could use it the exact same way and follow the same document combining the MS with the HEI-4 module and end up with the same result, but what about that snazzy new IGBT High Current Ignition Coil Driver that’s built into the PCBv3.0 ECU? I was recently contacted by a customer that wanted to try and go this route, and I told him I’d make the necessary modifications and document the process for others to follow… so here we go! Level of control: Full Standalone EMS– Fuel and Ignition Control These same modifications work for the ’84-’89 300ZX, both turbo and non turbo.
Directly driving the coil with the MegaSquirt-I PCB 3.0 and MSnS-E 024s9 or later or the MegaSquirt-IIĪpplication: 1982-1983 280ZX Turbo, or conversions using the 82-83 turbo distributor
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