Hi, it's me again, with a crazy idea.



j9fd3s and RacerX have been talking about the use of two ignitors and two coils

to directly fire the leading spark plugs.



I, a broke M.F., can't locally find a MAZDA ignitor and coil in good used condition.

Plus after reading Jeff20b's Ignition upgrade, I realized that making a plate to install

the ignitors on properly would take more time and effort than I want to put out.



For the past week, I have kept my eyes open for a easier solution. I found that

GM HEI ignition modules (a fancy way to say ignitors) would function properly, and

be easier to use because of their configuration.

Also, they are @ $20US brand new at a parts store that delivers to my work. https://www.nopistons.com/forums/pub...#>/biggrin.png

as you can see, they have a flat backside and spade connectors.

you can wire it up like this:

(I "Borrowed" Jeff20b's diagram and "re-worked" it)

cool, im prolly still too lazy to do it



mike

https://www.nopistons.com/forums/upl...1044338810.gif

lol

just when i had convinced my friend to give me his dizzy. hmm, so that would also work, eh. any more specific details on them gm ignitors, ie: year, car, model, etc...

gm stuff is hard cause they are all basically the same from 78-98 but they gotta have 2-3 different numbers, so you have to keep giving them applications until you find one that they stock.



mike

Thats what I want to know,Car,year and model.

Here is where I found the picture:

http://www.partsamerica.com/PartDetails.as...=0&SpecialType=



the part # is also a "Standard Ignition" part# (DR= Delco Remy)

the vehicle I used to find this is a 1976 chevrolet Impala 350 4bbl

https://www.nopistons.com/forums/pub...#>/biggrin.png

Those look like standard ignitors for 5.7L carbed applications.I looked thru several makes of GM and the 5.7L engines all use that type of ignitor.I know what I might upgrade too. https://www.nopistons.com/forums/pub...#>/biggrin.png

Yup, you got it! Plus if you look here:

http://www.partsamerica.com/PartDetails.as...=0&SpecialType=

You will see a 42000-45000V ignition coil that should blast through just about anything.

It is also a H.E.I (High Energy Ignition) coil, so it should mate with the module well.

It's also under $25US new. :smirk:

p.s. I just made rotor nut! https://www.nopistons.com/forums/pub...#>/biggrin.png

I got your rotor nuts.. https://www.nopistons.com/forums/pub...#>/biggrin.png j/k :bigthumg:

funny... they do feel different... Hmmm.... https://www.nopistons.com/forums/pub...IR#>/bling.gif

LMFAO! :bigok:

If youre not gonna make a plate, where are you gonna mount them? Also, how are you gonna mount the third coil if youre not gonna make anything? Are you sure the output on those is "right"?



~T.J.

thats actually my other problem, i have a racing beat strut bar and ac, so there isnt a good place to mount any new coils



mike

Just mount them ny where the stockers are.If I do this ignition I'll just get another stock coil and use those ignitors.Should work good enough.

the plate idea works better with these because all the terminals are accessible. The

mazda ignitor was designed to screw to the distributer and plug into the pickup coil inside.

Which means that in order to plug the extention wires (from pickup coil to ignitor) in, you

need to cut a hole in the plate.



The same side that NEEDS to be attatched to a larger heat sink (plate). is the same side

that has the pickup coil terminals.



With the Delco's the bottom needs the heat sink.

You do need to make sure that you get one for pre-1983 applications, because I think that the modules changed in 83 to a five prong design, 2 on one end and 3 on the other. If it is 1983 that is the cutoff year, the reason is the computer ignition was added then. I think. I do know that 83's have a five prong design because I replaced mine in the Blazer that I used to own.

click this link...

repost of wiring diagram

I have three accell superstock coils they should work shouldn't they?

I need to edit my wiring diagram...

Give me 2 sec's..

I had to re do my diagram to get the proper slope timing.

I got my wiring from a datson 240 website the pickup coil looked the same as the mazda's one green one red wire so I used that and modified it for three igniters and two pickups.

Yes the accel super coils should work great.

make sure you have a good ground at the module mounting screws, that's where

the module gets it's ground from.

See Here:

Here's the test procedure for the original module:

in both pics you'll notice the coil - terminal is wired to the "C" terminal and the ignition + is

wired to the "B" terminal.

Ok I've got mine wired like you'r first diagram now I'll try the second one. I got my diagram from herehttp://www.zhome.com/ZCMnL/tech/gmhei.html. Will it make a diferance that I'm useing three gm mods not two?

Not really, just make sure that the leading pickup coil is going to the leading 2 modules and

the trailing 1 is going to the trailing module. otherwise the timing will be all off.



Raul

could my timing problem be because I have it wired up the first way?

The slope looks like this:

The module "fires" the coil on the sharp downward spike. if you have the wires backwards,

then the sharply defined downward spike becomes a up spike. The timing can become erratic

and wander 2-3 degrees.