I have the same exact setup except for running 6265 dbb turbo. No issue running 18 psi dynoed 490 at 23 psi q16
currently running 16 psi low boost and 21 psi high boost on 93 pump gas but having problems with traction at high boost. That being said Just replaced oem head gasket after over 2yrs of abuse the composite material will not stand up to that kind of power. my plugs or piston show no sign of detonation. The metal rings around the piston slowly deform until your coolant starts overflowing. Good luck with your build
currently running 16 psi low boost and 21 psi high boost on 93 pump gas but having problems with traction at high boost. That being said Just replaced oem head gasket after over 2yrs of abuse the composite material will not stand up to that kind of power. my plugs or piston show no sign of detonation. The metal rings around the piston slowly deform until your coolant starts overflowing. Good luck with your build