i have a fiesta rs turbo, built the engine myself 1.8zvh etc

at 12psi its 204.4

my question is, why does it says it boosts at 5k in 4th, and fuelling, what injectots would u recomend and fuel pump?

spec

1.8zvh bottom end
stage 1 head
burton power cam and vernier
pace charge cooled
t3 turbo
-31 group a actuator
4" full scorpion
rebuilt lsd box
smacos
bailey dump valve
alloy radiatror
bailey oil breather
ofac ecu with unknown chip, 16psi then cut in with out chip, unlimited with chip
ap racing clutch (uprated to 350bhp)
burton power felpro head gasket & head bolts
induction filter,
standard fuel pump i think
and standard blue injectors