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dual spark plug distributor for a 2.3


uglyryde

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Does anyone know if they make a dual spark plug distributor for the 2.3? i am curious, wanting to build a dual spark plug 2.3 carbed engine just because I haven't seen or heard of it being done. Seems like there should be a dizzy out there for this application.
 


tomw

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If you are trying to get the 8-plug head to work with a distributor, you could take the signal from a normal distributor, and feed it to another coil, or just ignore the drivers side plugs. They are fired at specific times, not all the time, while the passenger side plugs are used 100% of the time.
tom
 

adsm08

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I don't think there is. The 2.3 went to EDIS the same year it went dual spark. To run a distributor would be tricky, because the two plugs don't fire at exactly the same time.

And since that dual plug system is for emissions, not performance, and there isn't a lot of aftermarket performance support for the 2.3 I am not surprised nobody makes a distributor for that engine.
 

RonD

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No, they don't make a twin plug distributor for the 2.3l Lima engine.

You can have one custom made, although the cost would be high and performance gain would be almost 0, as adsm08 said it was an emissions add-on for the 2.3l.

2.3l Duraspark distributor and HEI module would be the best and easiest to use for a carb 2.3l.

Twin spark can be done with just a custom made cap and rotor, plus second coil
The cap would have the 8 spark plug wires and 2 coil wire hook ups
4 of the cap contacts would be short and 4 long
The rotor would have two separate coil contacts, one for the 4 short and one for the 4 long.
When rotor is at #1 then both coils spark and the short and long contacts send spark out on the two #1 wires

Found pictures of that here: http://www.raceservice4u.com/Twin plug.htm
For 6 cylinder engines but same would apply to 4cyl
 

uglyryde

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My idea is to have both spark plugs fire at the same time, not per the standard emissions waste spark/compression spark. This is just an idea that i am tinkering with.
 

RonD

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The Distributorless 2.3l system does fire both spark plugs at the same time.

Both spark plugs fire on compression stroke and both fire on exhaust stroke, it doesn't alternate.
Each coil pack for the 2.3l distributorless system only has 2 coils inside, each coil is connected to 2 spark plugs, wired in series.
When computer/module fires a coil both cylinders get spark
Both coil packs are wire with 1 and 4 on one coil and 2 and 3 on the other coil.
So 1 and 4 both get spark every time they are at TDC, same for 2 and 3

One heads up on the distributorless 2.3l/2.5l Lima engines, only the Exhaust side spark plugs/coil is working when starter motor is engaged, intake side doesn't start sparking until engine starts, RPMs above 400

Waste spark was the first spark system ever used, magneto spark system is waste spark, it sparks cylinder at each TDC, compression and exhaust.
Your gas lawn mower is waste spark.

It is simply easier to use the crank timing to time spark than using cam timing on smaller engines.
With Multi-cylinder using a distributor became simpler, but when you eliminate the distributor the "waste spark" becomes simpler again.

4cyl, 6cyl, V6 and V8(V10 or V12 as well) all use Matched Pairs of pistons and rods to balance the engine/crank.
This means 2 pistons will be at top dead center(TDC) at the same time, the Matched Pair, because it is a 4-stroke engine one cylinder/piston will be on compression stroke and the other on exhaust stroke.
You can spark both cylinders at that time, the one on compression stroke will power the engine, the one on exhaust stroke won't but also doesn't hurt anything either.
So sparking both Matched Pairs at TDC can be done with just crank timing, using the CKP(crank position) sensor.

If you look at the firing order of any engine you can see the Matched Pairs
2.3l is 1-3-4-2
Split it in half and put one half below the other
1-3-
4-2
1 and 4 are matched pair
2 and 3 are matched pair
And if you look at the coil pack wiring you will see that pairing, on both coil packs

V6 is 1-4-2-5-3-6
1-4-2-
5-3-6
So we have 1-5, 3-4, 2-6 as the matched pairs

V8 is 1-5-4-2-6-3-7-8
1-5-4-2-
6-3-7-8

1-6, 3-5, 4-7, 2-8 are matched pairs

Any matched pairs can both get spark at TDC, compression or exhaust stroke doesn't matter
 
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