SUZUKI SWIFT G13B DISTRIBUTOR TO COIL ON PLUG CONVERSION

Hi everyone,

I have decided to install a turbo on my originally N/A G13B engine, so i am thinking about to convert ignition system from distributor to coil on plug system. I will use a Speeduino ECU, really cheap and functionally, because it uses TunerStudio software just like the more popular Megasquirt.

Whit coil on plug system, I want to use a fully sequential ignition (and injection).

So here my questions:

1- Which are the parameters that allow you to choose the correct coil to use?

2- For the trigger input, I know that the ECU needs two input: one for the engine speed and one for knowing which cylinder is on compression stroke. For these two, is it possible to use only one pulley on crankshaft with one missing tooth or should use two pulley (one on crank and one on cam or anyway use input from the old trigger into the distributor?

Thank you for all who will answer.

Regards.

You don't actually NEED the input for the firing stroke, although it would be better - with just the crank position you can run what is called "Batch", or "semi-sequential", which is when 1 & 4 fire togethe on every rotation, as do 2&3, with the injectors opening at 50% of the fuel requirement on each revolution, so for each full cycle 100% fuel is injected.

As I recall, that engine has an electonic hall, or similar, signal generator for the coil, you 'should' be able to remove 3 of the signal generators to give you a crank' firing, or rather cam position, sender. I would suggest picking up a s/h one if you can and modifying it first - other Suzukis of the time may use the same trigger mechanism, which can be swapped out, but not something I have knowledge of.

Thank you for replying Gord.

Also if Batch ignition is really simple to realize from the point of view of trigger input, i prefer to use a full-sequential ignition. So can you please explain me what do you mean by saying "signal generator"? I am really sorry for my lack of knowledge about the terms but i am italian so i would be really glad if you could explain me with easier-understanding terms. Furthermore, what do you mean for s/h? Are these terms about the using of the original distributor trigger for trigger input, are not they?

About the type of coil, how can i select the correct one for my application? Do i need any parameters?

Thank you.

Uh, yes - if I have the right engine in mind, it will have a distributor which uses an electronic module inside the distributor housing that replaces the older style points and condenser, with a ground wire from the coil. If so, that grounding wire is triggered 4 times per two revolutions and it 'should' be possible to modify it by removing three of the four pieces that operate the triger, this will leave one that triggers once every two revolutions and this can be used to indicate the camshaft position - or more to the point, whether #1 is coming up on compression-firing at TDC or on overlap where the exhaust is closing and the intake opening, so the spark is triggered at the correct point.

S/H just means 'second hand', or used. I suggest that in case you make a mistake in modifying it - assuming it can be done.

Is there any particular reason you want to run coil-on-plug as you can keep the current coil if you are able to ground the wire using the ECU in the same way as the OEM trigger did. It would also simplify things, as you will need to fabricate some form of coil mount and figure out the coil-to-plug distance for the correct length 'nose' on the coil packs you decide on.

[edit] Just double checked, I was actually confusing the G13A, which I actually have in the 'shopping basket', with the G13B which a friend had in his group N rally car around 30 years ago. I think there was another chap with that engine in the project/builds forum, if you check?