distributorless ignition system

[TurboTony]

Sorry dude, wouldn't work. You need some major voltage to jump the air gap, 12 wouldn't cut it.

Adding a cam sensor to the stock distributor shouldn't be that hard, something i'm gonna work at over the winter. Remeber, the whole point to this is to make a trouble free, low maintence type of ignition.


Tony

 

[Ian Turgeon]

we would definatly need a major rework on the cap/rotar.. Im thinking a magnet on a stick, rotating below/next to semi-circular recievers in the cap. (large enough to cover 30-40degrees advance).

once the stick gets within the receiver's relm, it would know thats the correct plug to fire. and the est could still fire advance/retard.

I guess im hoping someone interested will put the effort out.. infact, im surprized no one makes such a conversion.. think of all the applications that could benifit. could be a pretty big money maker.

I'd be interested in trying, but I'd need to do alot of research and learning to accomplish such a piece of hardware/electronics.

Do we know exactly what sort of signal the EST sends? voltage? Is it only one wire sending the signal?

 

[JoeLutz]

Just a couple thoughts.
1. Could we use the existing crank sensor signal rather than a cam sync signal to start the sequence with a waisted spark setup?
2. By using the EST to signal the box which in turn fires the coils, would we not be limited in dwell time which is another drawback to distributors?

 

[jjorgensen52]

Re: distributorless ignition system

Adding a cam sensor to the stock distributor shouldn't be that hard, something i'm gonna work at over the winter. Remeber, the whole point to this is to make a trouble free, low maintence type of ignition.
Tony

Agreed... just for an idea basis, if you were to use something like the MSD Flying Magnet crank trigger, but with a smaller wheel (like 1.5 - 2"), in place of the rotor? Then you could use their control system....

On a different note, does anyone know how the 3800 series v6 (the one i looked at was a '94) coordinates it's ignition? It looks like the same plugs as our distributor , plus one that i assume is the crank trigger? that system (coils / controller) is really cheap.... :2cents:

 

[jjorgensen52]

Re: distributorless ignition system

How much advance / retard can the distributor itself accomplish?
I'm seeing something of this nature ( i think this is what Ian was trying to describe)

 

[vortecfiero]

Re: distributorless ignition system

just a shot in the dark.... would removing 5 of the bumps, leaving no.1, on the magnet part of the stock sensor indicate the start of sequence for your system ?

craig

 

[jjorgensen52]

Re: distributorless ignition system

I wasjust thinking of a way to do it without a brain involved... hence all 6 sensors... with some sort of sequence contorller, 1 would od it

 

[leroy]

Re: distributorless ignition system

One magnet and sensor will do it. All that's needed is a way to determine #1 (A coil on eDist). The stock pickup coil still triggers the ignition module for each cylinder.

Jim

 

[jjorgensen52]

Re: distributorless ignition system

One magnet and sensor will do it. All that's needed is a way to determine #1 (A coil on eDist). The stock pickup coil still triggers the ignition module for each cylinder.

Jim

So, the original coil / EST remain and send a pulse to each coil via the eDist? If thats all the hook up required I'm definitely doing this

 

[leroy]

Re: distributorless ignition system

So, the original coil / EST remain and send a pulse to each coil via the eDist? If thats all the hook up required I'm definitely doing this

Yeah, the original pickup coil, ignition module, and est could be used.

http://www.sunflower.com/~leroy/edist.htm shows how I did it. The stock distributor pickup coil could be used in place of the crank trigger. You'll still have to come up with something for the cam sensor.

Jim