Ignition coils wiring (S13 SR)

[Bbandit]

Hello all,

I'm at the ignition coil wirings on my SR right now.. (with LT10s Microtech ECU)

but before I start connecting wires and soldering stuff, I want to make sure where the 12V ign wire should I connect to.

http://www.aww-kittah-aww.com/up/files/119/Ignition%20Wiring%20SR20.JPG

As you can see the picture above, look at the top left of the picture saying "IGN 12V"

I was thinking about connecting this straight to the + battery but that would mean the connection will always be hot.

Second thought was to connect it to the IGN ON wire under the steering column but that doesnt seem right.

Third thought was to connect it to the Constant ON wire under the the steering column but that sounds just wrong.. since this is going into the coils.

Any suggestions guys?

If I would want to use a Relay using IGN ON to trigger the 12V from the battery, would 30 amps relay be good enough?

BTW, I've checked SR FSM and found out that it goes straight into IGN ON wire.

Just want to make sure before I short everything out or blow up my ignition switch hehe

[shame_16]

The IGN 12V should be connected to a hot wire when the ignition is switched on. You do not want constant voltage going to the coils when not firing, or else you'll fry all of your coils. You should'nt have to worry about blowing up your ignition switch since you are supplying the coils with power. The coils should not feedback into the ignition.

[Bbandit]

Awesome! Thanks a lot man!