Según B-S-G la configuración sería está.
Recommended settings for
B-S-G's Modded Google Camera 4.4.020 with HDR+ for Android 7.0 / ARM64 v3.2 All-in-One Full Manual
Long HDR+ On and fast HDR+ Auto (ZSL)
Camera module config - Pixel XL
Buffers size - 37
Total imagereader image count - 52
HDR+ burst frame count - 16
Calculation algorithm for HDR+ imagereader image count - Pixel XL
HDR+ imagereader image count - 10
Saludos.