soo.. this is info on my up coming switch to coil on plug(cop) from coil pack and megasquirtsoobrxdrivingfun in general. thanks to northwet for encouraging public discourse.
this will be done on an ms2 v3.0 029y4(?)msextra firmware attched to my ej22t/dohc with a 36-2-2 crank timing belt gear/ crank trigger from a later ej motor.
The current coil pack is an ej25d unit that matches the heads/intake. the cop's i will be using are svx( dumb coil, no ignitor). the change to the ecu will be a change of scale rather than design. the hardware is wired in the same but 2 more drivers are needed because the coil count goes from 2(2 coils in a coil pack) to 4
wrx/sti(smart coil, on board ignitor) are also an option with slightly different(simpler over all, no drivers required) ecu configuration.
If you go here..
and scroll down to here..
Three or Four Coil Outputs (6 and 8 cyl Wasted Spark or 4cyl COP without ignitors) --its a long page--
You can see the technical bits of what im going to be doing. All the info to modify the ms hardware for this operation is provided.
Ill try and show some of the grunt work of whats involved. i have run on both dumb and smart cop coils, various coil packs and old style coil w/distributor.
Edited by bluto5, 09 July 2013 - 06:42 PM.