Does this high-rpm WOT timing amount to a soft rev limiter? (LGX 3.6)

[CYN_CRVR]

This graph shows that the stock timing for my 2023 LGX Camaro increases sharply between 6800 rpm (peak power) and 7200 rpm (fuel cutoff).

LGX WOT Timing.png

Question 1: Does this behave as a soft rev limiter?
Question 2: Any risk in decreasing the timing at 7200 rpm to 21-22 deg to flatten it out beyond 6800 rpm?
Question 3: Would doing so make the engine pull harder to fuel cutoff?

[KillboyPowerhead]

Odd that the spark advance is reduced past 5200 - I would've expected the advance to slowly increase as RPM increases to compensate for the faster-moving pistons.

Could try dropping the spark at 7200 a couple of degrees at a time and see if the RPM rate of change increases or decreases from 5200 and up (do the same WOT test on the same road, same direction, etc.). Likewise you could slowly increase the advance from 5200 to 7200 and see if there's anything to gain, keeping on eye on your knock sensors. On my LFX I'm around 26 at 5200 with a more or less linear increase to 29 at 7200. Tuned for 91.

Do you see any noticeable change in cylinder airmass from 6800 to 7200?

[CYN_CRVR]

Odd that the spark advance is reduced past 5200 - I would've expected the advance to slowly increase as RPM increases to compensate for the faster-moving pistons.

Could try dropping the spark at 7200 a couple of degrees at a time and see if the RPM rate of change increases or decreases from 5200 and up (do the same WOT test on the same road, same direction, etc.). Likewise you could slowly increase the advance from 5200 to 7200 and see if there's anything to gain, keeping on eye on your knock sensors. On my LFX I'm around 26 at 5200 with a more or less linear increase to 29 at 7200. Tuned for 91.

Do you see any noticeable change in cylinder airmass from 6800 to 7200?

Could the decreasing spark advance past peak torque be related to cam angle changes in that area? ICA goes from -19.5* to -10.5* across this range.

Cylinder airmass seems pretty steady from 5300 (peak torque) to 7000 rpm. If anything, it tails off ever so slightly at the top.

I noticed my low octane table doesn't have the timing jump at 7200 rpm. I think I'll remove the jump from the high octane table, then experiment with gradually increasing the entire curve above 5200 rpm while monitoring KR and RPM rate.

Thanks,