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.

[Jack Standz]

So why I was asking is this. If the initial advance is say "8 to 14 degrees" and you add 30 degrees to it, you end up with 38 to 44 degrees all-in.

Is that too much? (For a 2056 with something around an 8.6 to 9.0 CR) You say 28 degrees is your target. Don't see how you can keep to that kind of a target with 30 degrees advance?

[914_teener]

So why I was asking is this. If the initial advance is say "8 to 14 degrees" and you add 30 degrees to it, you end up with 38 to 44 degrees all-in.

Is that too much? (For a 2056 with something around an 8.6 to 9.0 CR) You say 28 degrees is your target. Don't see how you can keep to that kind of a target with 30 degrees advance?

Jeez....I must be getting old or there are not enough of us old guys that understand the difference between static timing and dynamic advance timing.

When you set your idle timing, that is set first...so static timing. The rest is handled by the distributor wether it's a 123 or a set of weights and or vacuum signals from the engine.

The "curve" which is really a set of points "linear interpolation" is based on the engines VE or volumetric efficiency.


edit: Dwell ( when you have a set up points) is voodo as it sets the degrees of the cam angle(s) to fire the spark. Since it's voodo....the electronic dizzy's don't have em.

There; My Krusty comments.


Simple as that...no voodo math or mystery's about it.