Sorry to jump in .. but mine runs about 0.9 to 1.0 bar too .. HKS induction a de cat and cat back ... So that would be about right then ?? ..An Evo IV should be around 0.7 to 0.8 depending on exhaust and induction, yours is a little high.
Cheers Gray .. got a 5 ECU and usual stage 1 stuff .. getting the mapping done very very soon :thumbup:Changes to the OEM exhaust and induction improve the engine breathing, so you get higher boost. Some of the IV's fuel cut at 1.2, other at 1.7.
Don't go anymore than 1.1 without fitting a later ECU and remapping.