so you would need to get a electronic distributor and grind off five teeth so it is now a cylinder #1 trigger. would that work?

zedpapa

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1970 dodge dart w/225 /6 bored .040" over, holley 390cfm w/vac. sec., compcams 252s, clifford shorty headers w/2.5" exhaust w/flowmaster, f-body 11" front discs, aluminum A-833OD, 8 1/4 w/3.21 SG
soon to have 5 gears!!!

That setup would work pretty well, especially for coil-on-plug. Many factory DIS systems work in a similar way.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

if going that way then you could put a cap on it and use one coil and still have the distributor "distribute" spark, but the curve could be determined by whichever ignition system. right? isn't it done that way on the Jeeps and other cars? that would save money as you would only need one coil instead of three or six. the one thing i noticed about the rotors in those setups is the tip is wider to allow for timing changes.

zedpapa

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1970 dodge dart w/225 /6 bored .040" over, holley 390cfm w/vac. sec., compcams 252s, clifford shorty headers w/2.5" exhaust w/flowmaster, f-body 11" front discs, aluminum A-833OD, 8 1/4 w/3.21 SG
soon to have 5 gears!!!

If you're using a distributor but want maximum accuracy, you can just use the three trigger Flying Magnet wheel and not hook up any electronics in the distributor (unless you're also running a sequential EFI setup that requires a cam trigger). Megasquirt and many other aftermarket ECUs can work three equally spaced crank triggers. If you wanted to be really perverse, I suspect you could eve make a Mopar Lean Burn computer work with a crank trigger.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

you still need a cyl. 1 trigger with a flying magnet system, right?

zedpapa

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1970 dodge dart w/225 /6 bored .040" over, holley 390cfm w/vac. sec., compcams 252s, clifford shorty headers w/2.5" exhaust w/flowmaster, f-body 11" front discs, aluminum A-833OD, 8 1/4 w/3.21 SG
soon to have 5 gears!!!

Only if you are either running sequential injection or a distributorless ignition. If you are running a distributor and batch-fire, no.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

If you use just three crank triggers does that make it it fire every plug twice; once on the compression, and once on the exhaust. I looked at the Ford EDIS post that was linked some time back, and the Ford six has just three coils. Pardon the ignorance here. This is perhaps my weekest knowledge base at this time. So many ignition types, and so little time to learn. I am trying to figure out how one would adapt the EDIS style ignition to the Accel ECU and the Mopar slant. The Ford EDIS has a 36 tooth crank trigger, which i guess you would mount on the front of the balancer on the slant. Any insight or thoughts on that?
Sam

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Yes, that's the easiest way(so you don't have to figure out which cylinder is the correct one to fire). The coils usually are dual terminal coils that hook up to 2 plugs (opposite in the firing order ( 1&6, 5@2, 3@4) and often called wasted spark). Another possibility is individual coils that you'd fire simultaneously.

1 plug is firing at the normal time, while it's pair is on the exhaust cycle where the spark doesn't do any harm.

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

With three crank triggers plus a single cam trigger, you could get a coil on plug system to work with six independant coil drivers. It starts the count each time it sees the cam trigger, and it would have six pulses from the crank wheel between cam pulses.

The only really tricky part about EDIS is mounting the trigger wheel on the crank pulley and making a bracket. I haven't tried that yet, but I'm planning on it. You could either weld a trigger ring to the outside of the pulley or use the crank bolt to hold it in place.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

Is there a magnetic pickup placed near the teeth on the crank trigger? Is this a universal inductance pickup similar to the little one inside the Mopar distributor? As I am begininning to undersand, then you would still have a distributor, but no spark plug wires come from it. They come from a seperate coil pack which is told when to fire by the EDIS microporcessor. What triggers the EDIS module. Would it be the same lead that fires an MSD box in the Accel ECU? I haven't checked, but I would imagine the Accel ECU can be set to a Ford EDIS inside the software. Ther eare a number of types that can be selected. The shop that tried to tune this before owns a 5L Mustang that they control with the ACcel set up. Maybe I will talk to him.
Sam

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Yes, you can use a universal inductance pickup (also called a VR sensor or variable reluctor) next to the crank trigger. This is the way Ford and many other OEM systems do this. A few use Hall effect sensors, another sort of magnetic trigger.
You can use a modified distributor for a cam trigger, but only need it if you are running coil-on-plug or sequential injection. If you are running EDIS or another wasted spark system along with batch-fire injection, you can just remove the distributor and plug the hole with a freeze plug.
Not sure about the Accel system, but most systems that support Ford EDIS would use a similar circuit to drive an MSD box. The EDIS module uses a 36-1 crank trigger to determine cylinder position and a signal from the ECU to determine spark timing.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

I had to speak up,

still can do it with cam with 4 and up triggers to spark 4 cylinders? I cannot put the 36-1 wheel on crank by way the chrysler had built the 2.2/2.5. Crank pulley have no room for VR wheel behind the pulley and putting on front is tricky.

Cheers, Wizard

Matt, do I understand you right that the EDIS does not use a cam sensor? How does it keep track of number one? I assumed this was a sequential EFI, but I guess since we are talking ignition, then the issue of injector firing is seperate. Still, how does the EDIS module know which crank trigger is number one? It would have to get some sort of initial signal upon start up to get things syncronized would it not? Does anyone have a photo they can post that shows the crank trigger and the associated pickup; not necessarily on a slant. Sorry to be so slow here. I do know more now than I did a year ago at this time. Thanks for your patience.
Sam

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Ford edis uses only crank pickup. It is a 36 tooth wheel, but one tooth is missing. Thats how it knows #1 - so I guess you can call it 35+1 tooth.

Let me dig up my old post I know I pasted some links about the edis setup somewhere.

Edit: Here it is...

http://www.bgsoflex.com/mjl/mjl_edis_summary.html gets into technical nittygritty of the signaling

http://megasquirt.sourceforge.net/extra ... uneed.html shows pictures of the parts. If you click the links on the top "Finding EDIS in..." it will give you part# and pix of item locations / part#s.

I believe there may be more about it in the megamanual as well

And #6 (for a slant)........................

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes