Don't know about SR20s specifically, but any distributorless ignition will have
a set of power transistors to switch the coils ( usually Field Effect Transistors
).
Unless the FETs are in the ECU box, you won't have any spark since there's nothing
operating your coil(s).
Basically, each coil is switched by the corresponding FET, so if you have an
understanding of power electronics you could actually build a module.
How many wires feed into this transistor box ?
If it's 5, then you have 1 switching wire per FET plus an earth. If 3, then
it's a 'twinned' 2-coil system which fires twice per cycle, one extra spark
at TDC on exhaust stroke. Either would be a doddle to build with the right tools,
but if there's more wires then there's some feedback to the ECU as well - much
harder to suss out.
$100 worth of parts for the 5-wire, including a box and connectors. How much
for a genuine item ?
Hmm...that'll do for now - I guess when you spend some thousands on a motor
a $200+ ignition module is pretty reasonable.
DF
>Does the S13 SR20 have the same setup as the S14 as far as having a power
>transistor wired in before the 4 coils? Is it the same system, and does it
>look the same... Coz I'm buggered if I can find one on my engine, and I
>don't want to try starting the engine without it or I'll have a hell of a
>time won't I?
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