123ignition distributor - 15000 miles road test - Page 6 - Alfa Romeo Bulletin Board & Forums
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post #76 of 510 (permalink) Old 07-04-2013, 12:38 AM
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As I understand the wiring diagram from the 123ignition manual:

BLUE: directly to ground (earth)
RED: directly to coil positive +
BLACK: directly to coil negative -
YELLOW: to a 12V source through a switch.
When this switch is OPEN = Curve#1.
When this switch is CLOSED = Curve#2


Am I reading it correctly? Is that how you're doing it?
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post #77 of 510 (permalink) Old 07-04-2013, 04:58 AM
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No, I have the blue wire also switched. I'll relook at my wiring (ground the blue wire) and see what happens.
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post #78 of 510 (permalink) Old 07-04-2013, 09:39 AM
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Douglas,

After looking at your post and re-looking at the wiring diagram the "light bulb" went on. Blue wire is grounded and the yellow wire is switched: all is well, everything works!

thanks, -John
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post #79 of 510 (permalink) Old 07-04-2013, 10:23 AM
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good news!
It will be interesting to hear about the curves you choose and your impressions.

D o u g l a s
1984 spider "veloce"
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post #80 of 510 (permalink) Old 11-19-2013, 11:11 AM
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I've been considering getting a 123Ignition for my 74 Spider and am debating whether to get the standard 123/ALFA-4-R and just use the curve that seems to match my car the best - or get the Tune version.

I guess I'm a little dissapointed that it doesnt seem like the curves from the standard one are available - or are they?

If I was able to load up the data from the curves that came in the normal system, that would seem ideal in terms of being able to evaluate the ones they provide but not have to compromise.

The OP said:
Quote:
The "006 tuning" curve #D is the Jim Karamalakis curve. It seems to be the best choice for my engine. The idle is easy to adjust since the curve is flat at 1000 rpm and the throttle response is good, if not as good as the Shankle.
Wouldnt it be ideal if he had the data for both the E and D curves and was able to combine the parts that work best?
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post #81 of 510 (permalink) Old 11-19-2013, 01:30 PM Thread Starter
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Curve #1, the Bosch 045 should be good for you. It was was used for European 2L motors and it is a good all round curve.

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
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post #82 of 510 (permalink) Old 11-27-2013, 08:51 PM
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Purchased the Tune version

I watched the videos they have on YouTube going over the whole system for the Tune version and played with the software a little - it looks awesome.

So I went ahead and purchased the Tune version and am looking forward to experimenting with it.

Does anyone know what the details are for the #E and #D curves in the standard 123\ALFA-4-R distributor?
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post #83 of 510 (permalink) Old 11-27-2013, 08:57 PM Thread Starter
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You may have to search a bit to find it but there is a post that details everyone of the curves. I may have a print-out of it somewhere.

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
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post #84 of 510 (permalink) Old 11-27-2013, 09:17 PM
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Search Success!

I think this may be the thread you are thinking of:
http://www.alfabb.com/bb/forums/engi...tml#post608678

Should be pretty easy to enter the data from these into the software and experiment from there!
Attached Images
  
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post #85 of 510 (permalink) Old 11-28-2013, 06:03 AM Thread Starter
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There is a post that consists of tables of spark advance vs rpm. The graph that you reproduced looks like one of mine that I constructed from the tables.

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
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post #86 of 510 (permalink) Old 11-28-2013, 06:11 PM Thread Starter
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Here is the original data for the curves in question.
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File Type: pdf 123 curves C&D.pdf (483.2 KB, 386 views)
File Type: pdf 123 curves E&F.pdf (484.4 KB, 314 views)

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
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post #87 of 510 (permalink) Old 11-28-2013, 06:16 PM
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Yay, thank you so much!

And just to add to the collection of information, attached is an XML file for the 123 Tune Software which represents the #1 curve for the 2L engine. I had to rename it to a .txt file to attach - but just change it back to .xml and load it in.
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File Type: txt Alfa Spider 2000_curve_1.txt (1.4 KB, 313 views)
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post #88 of 510 (permalink) Old 11-29-2013, 06:02 PM
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Is anyone running a curve in a fast road /track car that is significantly different from those in the charts above? I'm using the curve below and would be interested in the experience of others especially if they have been able to set best curve from running on a dyno. Thanks, John
Revs Advance
500 20
1000 20
1600 24
2400 28
3000 32
4200 34
5100 38
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post #89 of 510 (permalink) Old 11-30-2013, 07:36 AM
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Garage
I have a 123 in my 71 and it is a big improvement over my worn-out? Marelli. However it's the older version where the curves are chosen by removing a plug -in the bottom- of the distributor, and then rotating a switch. This means that you have to pull the distributor to change the curve. No a big deal once you've chosen the right curve and decided to stay with it. Still, if you like to play, and I do, I think I'd recommend the newer model with the USB port -in the side- where it's accessible.

71 Spider
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post #90 of 510 (permalink) Old 01-18-2014, 03:52 PM
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I'm finally getting to experiment with my 123-Tune distributor.

I have set the curve via the software to be the same as the stock Marelli.

First question is whether the static timing should be done to the P or F mark?

The shop manual I have makes it sound like you get the engine to P for compression on #1 and then roll it back to F to set the static timing. Is it the same for the 123?

1974 Alfa Spider
2010 Porsche Cayman-S (will trade for a 4C)
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