'd done a bit of research into what was required to get rid of the distributer on the 3S engine, and run one coil per cylinder 'direct' igntion. This was in part because I wanted to change the igniton components (leads / cap / rotor and maybe ignitor) on a newly purchased Rev 2 Turbo, then I discovered that the aftermarket ECU the car came with (Link G3) has the capabilty to run individual COP's without any additional hardware (coil type dependant!).1ZZ-FE coils are readily available
(from MR2 mk3's, celica's, corolla's, Avensis' (Avensii?)) and have the coil and ignitor complete as a single unit, therefore no requirements to mount a remote ignitor unit, and they fit well within the stock 3S head. There is a bit of lateral movement (wobble), but use of the grommet fitted on the original plug wires makes them a snug fit! Height wise the 1ZZ's are spot on.Current Link G3 wiring I'll need to figure out:
Coils in initial position
Installed the celica side of the wiring harness for effect:
Problem is, I'm using a GT4 chargecooler, which severly restricts space here.
The cooler core does fit back on, but effectively sits onto of a couple of the coils, I'd really want a small gap, if nothing to avoid vibration and / or friction between the two.
Although I was ideally hoping to have all coils in alighment to given the conversion a more factory feel, its not required from an operation point, so after various trials with the cooler core, I think this gives me the most clearance, although I'll need to use a larger rubber hose section from the turbo to cooler inlet, the aim being to lift that front side of the cooler
, which although won't give a large gap, should provide just enough space to prevent actual contact. 
This is the mis-alignent with the turbo outlet and the cooler core, which I've heard is due to the slightly different positions of the Rev 2 vs.
Rev 3 manifolds (mine is a Rev 2). Might look at getting the cooler inlet cut and rotated to give a better match, although it was working fine before..
Proposed orientations
Wiring stuff
:icon_confused:
In relation to wiring, I think the biggest thing for me will be correctly connecting the igntion triggers to the ECU, and getting this right, as I'm currently not sure if sufficient spare outputs are available for the four individual coils, meaning I might have to re-pin some other fucntions or delete those I'm not likely to use anyway
(A/C idel up for example.). For the +12v and ground feeds, I'm just going to use those used for the original ignitorIgnitor feed is the wires going to the smaller plug here:
Any comments or assistance gratefully recieved.
. Ross
The celica side of the wiring is actually straight forward 
so i popped to my local breakers and there was loads! they let me cut them off and have em for 
