Just got done building 5.3 forged rotating assembly, btr stage 1 cam, dual springs, harden pushrods, 1000cc injectors, dual #6 meth injection, 75mm turbo 20ish psi

my issue is crackling under high boost pulled a bunch of timing and only ran on 14psi and crackle went away. Now I’m at 20psi running 10 degrees and I’m get pre detonation again (crackle)
My question is can a bad set of spark plug wires and coils cause this and does a Hobbs switch shut off after a certain psi. I’m running a 2 psi Hobbs switch for the meth. Afr seems like the meth is still active but wondering if the switch shuts off because of too much pressure?
don’t really know what else it could be so open to any information you guys may have thanks