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Anyone needing a new distributor or maybe a bit better performance from a 2600 engine follow this link (Also for 4 pot Alfa)

Link Alfa Romeo

Or there is a used Marelli on Ebay - Item 110213900049 - $150


123\ALFA 2600
Price: €299.00
Availability: Op voorraad / In stock

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The 123\ALFA 2600 is designed for 6 cylinders Alfa Romeo engines fitted with a Marelli S93A distributor or a Bosch distributor no. 0 231 111 034.

Description
The 123\ALFA 2600 is designed for 6 cylinders Alfa Romeo engines fitted with a Marelli S93A distributor or a Bosch distributor no. 0 231 111 034. No more wear, no more replacement of points nor condensor EVER again. The advance is now electronically calculated : set it, and forget it! The unit offers a built-in LED for easy static timing and several different advance-curves, which can be selected by means of a little switch. This is a great feature for easy fine-tuning your engine!

It also offers:
- automatic dwell
- spark balancing
- automatic power-cut after 1 second
- etc. etc.

Note: Although used coils all look alike, they should be viewed with suspicion since one cannot tell from the outside whether, and how often they were exposed to overheating in the past. Installing the 123 Ignition system will ensure that the coil will never be overheated again in future. We recommend the Bosch Blue Coil.

Availability: Op voorraad / In stock
 

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I put a 123/Ignition distributor in my 2600 last summer and it has never run as well. I don't know about the rest of you, but I have struggled with a weak spark, fouled spark plugs and an erratic advance curve since 1974. What a difference!

I bought mine from Leen APK in The Netherlands and they were very helpful. It has since become a standard catalog item on their website. The advance curve is from the original Alfa specifications. Installation was very simple (and fully reversible), instructions were clear and the LED made it very easy to set the timing accurately. The cap and rotor are standard Bosch parts and easy to find.

I'm also using a Bosch Blue Coil, which has the appearance of a standard coil from that era (except for the color).

I also found some modern high-performance 5MM spark plug wires made by Accel. I got mine from Summit Racing. They only have kits for V-8s, so there are a couple of extra wires. I haven't installed them yet, but I'm looking forward to the original appearance (except that they are black instead of green) with modern performance.
 

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When ordering a 123 distributor, I sent the Dutch manufacturer a Bosch data sheet for the Marelli S93A unit. Presumably, Alfa used the Marelli unit to determine initially the appropriate advance for Sprint/Spider engines under various conditions. Perhaps, Bosch recorded the Marelli data for use in curving its own distributors. The Bosch data sheet identifies a range of possible advance at various RPM's at with a maximum of 47 (+/- 3) degrees at 5000 RPM for engines using the Solex carb set up.

I asked the manufacturer to include 5 different curves based on the data in the Bosch test sheet, and have found the curves with the most advance (especially in the 1500 - 3000 range) perform the best. I have never experienced any pinging, and therefore think even more advance may be justified for this particular engine. Any one out there testing advance curves?
 
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