Basically the GM LS1 coil is an ignitor & coil package in one. Very compact and powerful. It requires 12+, two grounds, and the ignition signal from the ECU. I know for a fact that it works great with both Wolf & Haltech EMS. It *may* even work with the stock Toyota ECU, provided that the ECU's ignition signal to the ignitor is 12 volts, rising edge.
The LS1 coil is a quasi-COP design. In the stock application, the coils sit on the valve cover, connected to the spark plug via a short plug wire. What we did with the SR20s we've done, was to modify a set of SR20DE non turbo Magnacore custom wires, using LS1 coil ends from a Corvette wire set. The coils were mounted on the intake manifold.
Because the Haltech E6X we used only allowed waste spark when using sequential injection, we wired the 4 coils as 2 "virtual" coils. Each coil was connected to its own cylinder, but a pair of coils shared the same ECU ignition signal. So 2 & 3 would fire at the same time, then 1 & 4. Because you're firing two seperate coils, there's no performance degradation.
With the 1JZ, you could get an unassembled set of 2JZ-GE spark plug wires, use LS1 coil end connectors, and that would be it. Just find a good spot to mount the coils in the engine bay, and you're ready to go.
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