Although I view this site almost daily I seldom sign in, I just got notice of your message.
Centrifugal advance depends on three things, the advance head that is fitted, the spring rate and engine rpm. I've only seen one 3-5* head, it was mounted to a '83 (first year of CEC). So one might expect either 3* or 5* advance if a heavy spring was attached and depending on which slot was used. If light springs were attached you could/would double the amount available, so either 6 or 10*, still not near enough as should be expected.
As far as I know most YJ's are equipped with 6.75 - 7.75 limits and a few had 10-15* the latter a rarity. So the same rule applies, which head, which slot and then spring rate + rpm.
Only way to be certain is to plot a timing curve, the desired goal would be a range between 32 and 36* total and that should be figured as initial + centrifugal.
I hope this will help, if you will lead me to the post you've referred to I'll visit it to see what might be added.
Centrifugal advance depends on three things, the advance head that is fitted, the spring rate and engine rpm. I've only seen one 3-5* head, it was mounted to a '83 (first year of CEC). So one might expect either 3* or 5* advance if a heavy spring was attached and depending on which slot was used. If light springs were attached you could/would double the amount available, so either 6 or 10*, still not near enough as should be expected.
As far as I know most YJ's are equipped with 6.75 - 7.75 limits and a few had 10-15* the latter a rarity. So the same rule applies, which head, which slot and then spring rate + rpm.
Only way to be certain is to plot a timing curve, the desired goal would be a range between 32 and 36* total and that should be figured as initial + centrifugal.
I hope this will help, if you will lead me to the post you've referred to I'll visit it to see what might be added.