what do you think of this?

**arjunior45** · 13-08-09, 18:27

as promised to Nick and Jim, here are the wire connections for this mod, using :
- 2 pairs of 2 ignition modules. Each pair of ignition modules is 'M. Marelli AEI 450A' with two 'M. Marelli BKL3BD' on it.
and
- 4 stick coils, 'Bosch 0221 504 006 765', used on every 5-cylinder FIAT engine {N/A or Turbo}.

Explanation.

1} The 'ground' connected to pin 2 of each ign. module and each stick coil, goes to connector ?G60b? on the engine {ground engine} on the hall sensor.
It will be better if this wire is connected to battery 'earth' too or to the chassis.

2} the +12V wire for the 'stick coils' {Pin 3} is the same as for the 'ign. modules' {Pin 4} and comes from the 'ignition control relay - S28'

Note:
I still need to check if the Bosch stick coils have not any interference issue with the Alfa cam cover, and if the bl@@@y post employ will be able to find my package I'll check them this weekend.

If you intend to use other brand 'stick coils' then make sure for the pin connections-output. Might vary from the one mentioned above.

**na15575** · 13-08-09, 19:20

any idea for where we can find the conectors for the marelli module and the coils?

**jimnielsen** · 13-08-09, 21:06

Thanks for the comprehensive explanation!

**arjunior45** · 14-08-09, 05:26

Originally Posted by na15575

any idea for where we can find the conectors for the marelli module and the coils?

probably from Τζαβάρα Γ. {210-9215814}. For sure he has the coils connectors.

**arjunior45** · 16-08-09, 08:44

check clearance with Bosch 0 221 504 014 'stick coils' {5 cylinder N/A FIAT engine} as at postal office did not managed to find my parcel with Bosch 0 221 506 765 coils. Hope they will pay for it!
No clearance problems but I do need to make an alu supporting bracket.

Pictures of how they will look. No 'Alfa Romeo' logo for my engine, unless I'll found the cam cover with Alfa logo, from series 1 engine.

**cuore_sportivo_155** · 16-08-09, 12:16

if you want a stronger coil, look for the coils used by the 155 8v twin spark. these coils are also listed in the bosch performance parts catalog, and are in fact the strongest they have....

**arjunior45** · 17-08-09, 08:24

Originally Posted by cuore_sportivo_155

if you want a stronger coil, look for the coils used by the 155 8v twin spark. these coils are also listed in the bosch performance parts catalog, and are in fact the strongest they have....

thanks for the note, although I do not think I'm going to pay for a third set of coils.
This would have been useful a couple of month ago.
Besides in this 155 8v coil there are two output {the one for the second coil} and I do not like to have it open to the air.
I'll stick to the one already bought and see how it goes.

**cuore_sportivo_155** · 17-08-09, 22:11

the 155 8v has 2 coils to fire the 8 plugs. you would just need 1....

**arjunior45** · 18-08-09, 13:38

I knew that and both the coils {in one pair} are connected to each other. That's why there are two output on the 'first' coil - one for the proper spark plug and the second one for the 'second' coil. Wrong?

**na15575** · 19-08-09, 04:47

i don't remember exactly how the pairs go
but i know that the system is a misfire spark to

**Gery83** · 11-04-11, 18:28

What do you think of this solution?
m37.pdf
022710211.jpg

**jimnielsen** · 11-04-11, 22:35

How many coils can it drive Gery? 4?

jim.

**Gery83** · 12-04-11, 13:53

Yes, there is the pdf above the picture!
Have a look at it!
It's not the same coil as fiat uses, but I think the circuit can be modified a little bit.

Originally Posted by jimnielsen

How many coils can it drive Gery? 4?

jim.

**jimnielsen** · 12-04-11, 22:54

I think this is the perfect ignition module for use with an aftermarket ECU such as an Autronic or Motec. It makes it very easy to move from wasted spark to a 4 coil solution (if you have 4 coils...)

**Gery83** · 16-04-11, 14:02

Or why don't you use the modules this way?
These stick coils draw less current than the OEM ones, because their third pin is their trigger, the other two are used to supply the power. But I'll get a datasheet soon for the FIAT 20V ones. I think one ignition module can handle two of these stick coils, like on the picture below. Any comments? Opinions?
ignition.jpg

**Gery83** · 16-04-11, 15:40

Does anyone have a datashhet for Marelli BKL3BD?

**Gery83** · 18-05-11, 17:40

So finally managed to get some info about my COP-s, from fiat 20V engine.
And some pictures from some weeks ago. Right now, the engine is not in it's place...

15.JPG 22.JPG ignition system oeration.jpg

DSCF1889_Bildgr??e ?ndern.JPG

DSCF1890_Bildgr??e ?ndern.JPG