Some SA tuning questions...

What is better for cold start more or less SA?

Mild to choppy idle cam
When tuning idle SA what should one shoot for? Low temps? High Map? while keeping in mind car should run a bit rough with cam

Is there a way to blend tables based on finding a good idle SA and WOT SA, can one mathmaticaly come up with a base curve or is there sort of a set rule to have a jump of SA in relation to RPM MAP... say if I find idle is good at 20 and WOT is good at 32 how would one fill in the blanks sort of speak? Make a smooth graph and let the numbers fill in then just test for ping?

 

More SA the colder the coolant temp at start-up.
There is no set number because engines act differently.

True start-up enrichment and SA is only temporary giving a little time ( or engine revolutions) for the chamber and plugs to warm up. They warm up much quicker than the coolant will.

Warm-up enrichment or open-loop AFR vs Coolant is a different thing, as is the SA vs Coolant. These are not temporary and last until the coolant temp changes.

Warm-up: A general place to start is if you have 16* SA idle while warm (180*F) coolant, then something like 20* SA at 80*F coolant, and 24*SA at 40*F coolant.
The burn needs to be richer the colder the chambers are and the spark has to be started sooner. Each engine acts differently so it's not a linear type of relationship. It's best to just take several days to get it right.
Most tuners can tell by the sound or feel of the engine if it's happy at idle or by putting it in gear to see how strong the idle is, but you can also watch the MAP and the TPS.


Start-up: The true start-up values will need to be higher (more enrichment and more SA) to cover the initial cold start of the engine.
You may not need any extra SA for start up at most temperatures if your SA vs Coolant table supplies enough. For extreme cold you may want to add some like an extra 5*SA if the coolant is zero degrees, but again it depends on what you've put in your other table.

Different systems handle these functions slightly differently.
I wouldn't use a calculation for any of the spark values though. Just take the time to get them right.

Here's some more info about the warm-up as to do with OL tuning.
https://www.thirdgen.org/forums/diy-...op-tuning.html