Yeah somethings up but timing is def not the issue.
V8 motors dont need alot of timing to make alot of power with a turbo.
All my tunes run 16-17 degrees timing max. Its not overly conservative its just safe and no need for more timing like a blower needs.
My 10psi tune made 490rwhp with 16 degrees timing, that was before the frpp manifold.
My first dyno pull at 16psi was rich and had 15 degrees of timing and made 585rwhp. Cleaned up the air fuel and added 2 degrees of timing from 15 to 17, Netted me 70rwhp gain on the second pull.