2000 chevy 5.3 2bar SD enhanded spark tunning

[rs2112]

Looking for links to when and how the spark high & spark low are referenced. I know some of the boats I work on do an octane test on startup but I have no info on how they are used in the 2000 tune or if enhanced 2bar changes anything. Map or maf ref etc. Changing boost from 6 1/2 psi to 11 1/2 psi or more and wish to get the spark right. Using an older ax whipple hope to find pics or parts for intercooler conversion if out there please PM me Thanks

[67firebird455]

Set both of these tables to the same. I believe the PCM forces low octane when maf has been failed. I just programmed both tables to be identical.