Do you mean the Max spark retard scalar ? Its between The Min Load for open loop fuel control & Nominal AFR scalar values Or do you mean the spark_min_for_tip-in_retard Wich controls the spark during gear shifts ? That one is a little down the Max spark retard. Most of the Scalars are on Alphabetical order.
That is one of those things I found would never do anything by changing it. IIRC its 49 degrees as a default value on both t4m0 and j4j1 I once set it at 21 with my tip in retard at 36 which was same as max value in my base spark table. When I tipped in the throttle, I saw 36. That at least tells me it does not effect or over ride my tip in scalar. I looked it up a good while back in some help notes I got from SCT which seemed to be describing it as working with knock sensors ... which we don't have. Most likely ... They were talking about a pcm of later date than ours. Grady