Advance curve for 280 with 123 ignition ?

[yves]

I try to adjust the curve for my 123 ign
With the one attached.
Am i correct?
I have adjusted the static advance with  5 deg advance

[Pawel66]

yves, I am attaching what I use (courtesy of a Member here), but there are also posts about this topic if you do a search.

I have 6deg advance.

I guess in higher revs you may go up to 38deg total if it is not pinging, I left it a bit lower.

Best is to go through search and related posts.

[yves]

Thank’s Pawel, your’ right about more advance to higher revs , manu told me to adjust 30 degres at 3000 revs

[stickandrudderman]

manu told me to adjust 30 degres at 3000 revs

Which is correct if you have the vacuum advance disconnected. This is what the factory recommended. Once set you then re-connect the vacuum advance and confirm you've now got 38°.

[Pawel66]

Some more materials:
https://123ignitionusa.com/curve-tutorial/

and from forum

https://www.sl113.org/forums/index.php?topic=25880.msg185310#msg185310

And more curves from Members attached.