123 Ignition Distributor Timing Curve, Curve for carbureted 2056 Options

[SteveNMaine]

I am looking for the basic timing curve settings for a 123 TUNE+ 4-R-V-P distributor for a dual 40 IDF carbureted 2056.

I have been all over the different forums and really looking for more specific information for my build.

Thanks.

[flipb]

Here are some of the standard Bosch curves. I'm running 2056 with IDF 40s and I've programmed in the 050 curve; I find that it makes excellent power.

(IMG:http://www.914world.com/bbs2/uploads_offsite/rennlist.com-10752-1739984715.1.jpg)

[JamesM]

Assuming you have the fully programable model, it would benefit you to hold 8-10 degrees advance from just above your intended idle speed all the way down to zero rather than dropping your timing completely to zero. This will give a better, more consistant idle with less tendency to stall. another trick you could use is to have a plateau on your idle range and then slightly advance the timing ~100 RPM below that, so say 8 degrees advance from 800-1100 rpm but set a point at 700 rpm to 10-12 degrees. This will serve to automatically kit up the engine torque/speed if it starts heading for a stall.

As for the curve beyond that, the 009 curve looks like it would be an absolute dog below 3200. The curves I usually setup look more like the 022 and 031 curves you have. Most engines I aim for 28 degrees full advance, hitting it before 3000 rpm with the shape of the curve below that somewhat specific to the engine and if I am using vacuum advance/retard